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<html>
<head>
<meta http-equiv=Content-Type content="text/html; charset=windows-1252">
<meta name=Generator content="Microsoft Word 11 (filtered)">
<title>Introduction</title>
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<div class=Section1>
<h1><span style='font-size:14.0pt;font-family:Arial;color:navy;font-weight:
normal'>ezSQL Overview </span><span style='font-size:7.5pt;font-family:Arial;
color:navy;font-weight:normal'><a
href="http://php.justinvincent.com/download.php?ez_sql">download ez_sql.zip</a><br>
To email the creator: justin_at_jvmultimedia_dot_com</span></h1>
<p class=MsoNormal style='margin-left:18.0pt'><b><span style='font-size:10.0pt;
font-family:Arial;color:#003366'> </span></b></p>
<p class=MsoBodyText style='margin-left:36.0pt;text-indent:-18.0pt'><span
style='font-size:11.0pt;font-family:Symbol;color:#003366'>·</span><span
style='font-size:7.0pt;font-family:"Times New Roman";color:#003366'>
</span><span style='font-size:11.0pt;color:#003366'>ezSQL is a widget that
makes it very fast and easy for you to use database(s) within your PHP scripts
( mySQL / Oracle8/9 / InterBase/FireBird / PostgreSQL / MS-SQL / SQLite /
SQLite c++).</span></p>
<p class=MsoNormal style='text-indent:3.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoBodyText2 style='margin-left:36.0pt;text-indent:-18.0pt'><span
style='font-family:Symbol;color:#003366'>·</span><span style='font-size:7.0pt;
font-family:"Times New Roman";color:#003366'>
</span><span style='color:#003366'>It is one php file that you include at the
top of your script. Then, instead of using standard php database functions
listed in the php manual, you use a much smaller (and easier) set of
ezSQL functions.</span></p>
<p class=MsoBodyText2><span style='color:#003366'> </span></p>
<p class=MsoBodyText2 style='margin-left:36.0pt;text-indent:-18.0pt'><span
style='font-family:Symbol;color:#003366'>·</span><span style='font-size:7.0pt;
font-family:"Times New Roman";color:#003366'>
</span><span style='color:#003366'>It automatically caches query results and
allows you to use easy to understand functions to manipulate and extract them
without causing extra server overhead</span></p>
<p class=MsoBodyText2><span style='color:#003366'> </span></p>
<p class=MsoBodyText2 style='margin-left:36.0pt;text-indent:-18.0pt'><span
style='font-family:Symbol;color:#003366'>·</span><span style='font-size:7.0pt;
font-family:"Times New Roman";color:#003366'>
</span><span style='color:#003366'>It has excellent debug functions making it
lightning-fast to see what’s going on in your SQL code</span></p>
<p class=MsoBodyText2><span style='color:#003366'> </span></p>
<p class=MsoBodyText2 style='margin-left:36.0pt;text-indent:-18.0pt'><span
style='font-family:Symbol;color:#003366'>·</span><span style='font-size:7.0pt;
font-family:"Times New Roman";color:#003366'>
</span><span style='color:#003366'>Most ezSQL functions can return results as
Objects, Associative Arrays, or Numerical Arrays</span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt'><span
style='font-size:11.0pt;font-family:Symbol;color:#003366'>·</span><span
style='font-size:7.0pt;color:#003366'>
</span><span style='font-size:11.0pt;font-family:Arial;color:#003366'>It can
dramatically decrease development time and in most cases will streamline your
code and make things run faster as well as making it very easy to debug and
optimise your database queries.</span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt'><span
style='font-size:11.0pt;font-family:Symbol;color:#003366'>·</span><span
style='font-size:7.0pt;color:#003366'>
</span><span style='font-size:11.0pt;font-family:Arial;color:#003366'>It is a
small class and will not add very much overhead to your website.</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:gray'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><b><i><span style='font-size:
11.0pt;font-family:Arial;color:#003366'>Note:</span></i></b><i><span
style='font-size:11.0pt;font-family:Arial;color:#003366'> It is assumed that
you are familiar with PHP, basic Database concepts and basic SQL constructs.
Even if you are a complete beginner ezSQL can help you once you have read and
understood <u><a href="http://www.jvmultimedia.com/portal/node/14">this
tutorial</a></u>.</span></i></p>
<p class=MsoNormal style='margin-left:36.0pt'><i><span style='font-size:10.0pt;
font-family:Arial;color:#003366'> </span></i></p>
<div style='border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:#003366'> </span></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:#003366'> </span></i></p>
</div>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:gray'> </span></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:gray'> </span></i></p>
<h1><span style='font-size:14.0pt;font-family:Arial;color:navy;font-weight:
normal'>Quick Examples..</span></h1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'>Note:
In all these examples no other code is required other than including ez_sql.php</span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'>
----------------------------------------------------</span></p>
<h1 style='margin-left:36.0pt'><i><span style='font-size:11.0pt;font-family:
Arial;color:navy'>Example 1</span></i></h1>
<p class=MsoNormal style='text-indent:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Select multiple records from the database
and print them out..</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$users = $db->get_results("SELECT
name, email FROM users");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>foreach ( $users as $user )</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>{</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
</span><span style='font-size:11.0pt;font-family:Arial;color:purple'>// Access
data using object syntax</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
echo $user->name;</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
echo $user->email;</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>}</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h1 style='margin-left:36.0pt'><i><span style='font-size:11.0pt;font-family:
Arial;color:navy'>Example 2</span></i></h1>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Get one row from the database and print it
out..</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$user = $db->get_row("SELECT
name,email FROM users WHERE id = 2");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>echo $user->name;</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>echo $user->email;</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 3</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Get one variable from the database and print
it out..</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$var = $db->get_var("SELECT count(*)
FROM users");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>echo $var;</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 4</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Insert into the database</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$db->query("INSERT INTO users (id,
name, email) VALUES (NULL,'justin','jv@foo.com')");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 5</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Update the database</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$db->query("UPDATE users SET name =
'Justin' WHERE id = 2)");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 6</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Display last query and all associated
results</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$db->debug();</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 7</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Display the structure and contents of any
result(s) .. or any variable</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$results = $db->get_results("SELECT
name, email FROM users");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$db->vardump($results);</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 8</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Get 'one column' (based on column index) and
print it out..</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$names = $db->get_col("SELECT
name,email FROM users",0)</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>foreach ( $names as $name )</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>{</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
echo $name;</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>}</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 9</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Same as above ‘but quicker’</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>foreach ( $db->get_col("SELECT
name,email FROM users",0) as $name )</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>{</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
echo $name;</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>}</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<h6>Example 10</h6>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>----------------------------------------------------</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:purple'>// Map out the full schema of any given
database and print it out..</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$db->select("my_database");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>foreach ( $db->get_col("SHOW
TABLES",0) as $table_name )</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>{</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
$db->debug();</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
$db->get_results("DESC $table_name");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>}</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>$db->debug();</span></p>
<div style='border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:#003366'> </span></i></p>
</div>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:gray'> </span></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:gray'> </span></i></p>
<h1><span style='font-size:14.0pt;font-family:Arial;color:navy;font-weight:
normal'>Introduction</span></h1>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:Arial'> </span></b></p>
<p class=MsoBodyText style='margin-left:36.0pt'><span style='font-size:11.0pt;
color:#003366'>When working with databases most of the time you will want to do
one of four types of basic operations.</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:90.0pt;text-indent:-18.0pt'><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>1.</span><span
style='font-size:7.0pt;color:#003366'> </span><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>Perform a query such
as Insert or Update (without results)</span></p>
<p class=MsoNormal style='margin-left:90.0pt;text-indent:-18.0pt'><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>2.</span><span
style='font-size:7.0pt;color:#003366'> </span><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>Get a single variable
from the database</span></p>
<p class=MsoNormal style='margin-left:90.0pt;text-indent:-18.0pt'><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>3.</span><span
style='font-size:7.0pt;color:#003366'> </span><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>Get a single row from
the database</span></p>
<p class=MsoNormal style='margin-left:90.0pt;text-indent:-18.0pt'><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>4.</span><span
style='font-size:7.0pt;color:#003366'> </span><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>Get a list of results
from the database</span></p>
<p class=MsoBodyText style='margin-left:36.0pt'><span style='font-size:11.0pt;
color:#003366'> </span></p>
<p class=MsoBodyText style='margin-left:36.0pt'><span style='font-size:11.0pt;
color:#003366'>ezSQL wraps up these four basic actions into four very easy to
use functions. </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:72.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>bool <b>$db->query</b>(query)</span></p>
<p class=MsoNormal style='margin-left:72.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>var <b>$db->get_var</b>(query)</span></p>
<p class=MsoNormal style='margin-left:72.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>mixed <b>$db->get_row</b>(query)</span></p>
<p class=MsoNormal style='margin-left:72.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>mixed <b>$db->get_results</b>(query)</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><b><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></b></p>
<p class=MsoBodyText style='margin-left:36.0pt'><span style='font-size:11.0pt;
color:#003366'>With ezSQL these four functions are all you will need 99.9% of
the time. Of course there are also some other useful functions but we will get
into those later.</span></p>
<p class=MsoBodyText style='margin-left:36.0pt'><span style='font-size:11.0pt;
color:#003366'> </span></p>
<p class=MsoBodyText style='margin-left:36.0pt'><b><i><span style='font-size:
11.0pt;color:#003366'>Important Note:</span></i></b><i><span style='font-size:
11.0pt;color:#003366'> If you use ezSQL inside a function you write, you will
need to put <b>global $db;</b> at the top.</span></i></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:Arial'> </span></b></p>
<div style='border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:#003366'> </span></i></p>
</div>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:gray'> </span></i></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:Arial'> </span></b></p>
<h1><span style='font-size:14.0pt;font-family:Arial;color:navy;font-weight:
normal'>Installation</span></h1>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:Arial'> </span></b></p>
<p class=MsoBodyText style='margin-left:36.0pt'><span style='font-size:11.0pt;
color:#003366'>To install ezSQL download, unzip and install the contents of <b><a
href="http://php.justinvincent.com/download.php?ez_sql">ez_sql.zip</a></b> into
the same directory within your web server.</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><b><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></b></p>
<p class=MsoNormal style='margin-left:36.0pt'><b><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>Put the following at the top of your script:</span></b></p>
<p class=MsoNormal style='margin-left:36.0pt'> </p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // Include ezSQL core</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> include_once "ez_sql_core.php";</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // Include ezSQL database specific
component (in this case mySQL)</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> include_once
"ez_sql_mysql.php";</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // Initialise database object and
establish a connection</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // at the same time - db_user /
db_password / db_name / db_host</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> $db = new
ezSQL_mysql('db_user','db_password','db_name','db_host');</span></p>
<p class=MsoNormal style='margin-left:36.0pt'> </p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>Note: On most systems <b>localhost</b> will be
fine for the dbhost value. If you are unsure about any of the above settings
you should contact your provider or look through your providers documentation.</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>If you are running on a local machine and have
just installed mySQL for the first time, you can probably leave the user name
and password empty ( i.e. = “”) until you set up a mySQL user account.</span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial'> </span></p>
<div style='border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:#003366'> </span></i></p>
</div>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:gray'> </span></i></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial'> </span></p>
<h1><span style='font-size:14.0pt;font-family:Arial;color:navy;font-weight:
normal'>Running the ezSQL demo</span></h1>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>Once you have installed ezSQL as described
above you can see it in action by running ez_demo.php via your web browser. To
do this simply go to..</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:36.0pt'><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>http://yourserver.com/install_path/mysql/demo.php</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>If you are running your web server on your
local machine this will be..</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:36.0pt'><span
style='font-size:11.0pt;font-family:Arial;color:#003366'>http://127.0.0.1/install_path/mysql/demo.php</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>What the demo does… is use ezSQL functions to
map out the table structure of your database (i.e the database you specified at
the top of ez_sql.php). You will be surprised how little code is required to do
this when using ezSQL. I have included it here so you can get a quick feel for
the compactness and speed of ezSQL.</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'><?php</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // Include ezSQL core</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> include_once "ez_sql_core.php";</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // Include ezSQL database
specific component</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> include_once
"ez_sql_mysql.php";</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // Initialise database object and
establish a connection</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> // at the same time - db_user /
db_password / db_name / db_host</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> $db = new
ezSQL_mysql('db_user','db_password','db_name','db_host');</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
$my_tables = $db->get_results("SHOW TABLES",ARRAY_N);</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
$db->debug();</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
foreach ( $my_tables as $table )</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
{</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
$db->get_results("DESC $table[0]");</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
$db->debug();</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
}</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>
</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>?></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial'> </span></p>
<div style='border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:#003366'> </span></i></p>
</div>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:Arial;
color:gray'> </span></i></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial'> </span></p>
<h1><span style='font-size:14.0pt;font-family:Arial;color:navy;font-weight:
normal'>The ezSQL demo explained</span></h1>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt'><b><span style='font-size:10.0pt;
font-family:Arial;color:red'><?php</span></b></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>This is the standard way to start php
executing within your web page.</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><span style='font-size:10.0pt;
font-family:Arial'> </span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:36.0pt'><b><span
style='font-size:10.0pt;font-family:Arial;color:red'>include_once “ez_sql.php”;</span></b></p>
<p class=MsoNormal style='margin-left:72.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>This is how you include ezSQL in your script.
Normally you include it at the top of your script and from that point forward
you have access to any ezSQL function.</span></p>
<p class=MsoNormal style='margin-left:36.0pt'><b><span style='font-size:11.0pt;
font-family:Arial;color:#003366'> </span></b></p>
<p class=MsoNormal style='margin-left:36.0pt'><b><span style='font-size:10.0pt;
font-family:Arial;color:red'>
$my_tables = $db->get_results(“SHOW TABLES”,ARRAY_N);</span></b></p>
<p class=MsoBodyTextIndent2 style='margin-left:72.0pt'>get_results() is how you
get ‘a list’ of things from the database using ezSQL. The list is returned as
an array. In this case the std mySQL command of ‘SHOW TABLES’ is called
and the resulting list is stored in a newly created array $my_tables. </p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:36.0pt'><span
style='font-size:10.0pt;font-family:Arial'> </span></p>
<p class=MsoNormal style='margin-left:72.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>When using $db->get_results(), if there are
any results, they are always returned as multi-dimensional array. The first
dimension is a numbered index. Each of the numbered indexes is either an
object, associative array or numerical array containing all the values for ‘one
row’.</span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:36.0pt'><b><span
style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></b></p>
<p class=MsoNormal style='margin-left:72.0pt'><span style='font-size:11.0pt;
font-family:Arial;color:#003366'>For example using the switch ARRAY_A would
produce an array that looked something like this.</span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:36.0pt'><b><span
style='font-size:11.0pt;font-family:Arial;color:#003366'> </span></b></p>
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