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<?php
/**********************************************************************
* Author: Justin Vincent (jv@vip.ie)
* Web...: http://justinvincent.com
* Name..: ezSQL
* Desc..: ezSQL Core module - database abstraction library to make
* it very easy to deal with databases. ezSQLcore can not be used by
* itself (it is designed for use by database specific modules).
*
*/
/**********************************************************************
* ezSQL Constants
*/
define('EZSQL_VERSION','2.17');
define('OBJECT','OBJECT',true);
define('ARRAY_A','ARRAY_A',true);
define('ARRAY_N','ARRAY_N',true);
/**********************************************************************
* Core class containg common functions to manipulate query result
* sets once returned
*/
class ezSQLcore
{
var $trace = false; // same as $debug_all
var $debug_all = false; // same as $trace
var $debug_called = false;
var $vardump_called = false;
var $show_errors = true;
var $num_queries = 0;
var $last_query = null;
var $last_error = null;
var $col_info = null;
var $captured_errors = array();
var $cache_dir = false;
var $cache_queries = false;
var $cache_inserts = false;
var $use_disk_cache = false;
var $cache_timeout = 24; // hours
var $timers = array();
var $total_query_time = 0;
var $db_connect_time = 0;
var $trace_log = array();
var $use_trace_log = false;
var $sql_log_file = false;
var $do_profile = false;
var $profile_times = array();
// == TJH == default now needed for echo of debug function
var $debug_echo_is_on = true;
/**********************************************************************
* Constructor
*/
function ezSQLcore()
{
}
/**********************************************************************
* Get host and port from an "host:port" notation.
* Returns array of host and port. If port is omitted, returns $default
*/
function get_host_port( $host, $default = false )
{
$port = $default;
if ( false !== strpos( $host, ':' ) ) {
list( $host, $port ) = explode( ':', $host );
$port = (int) $port;
}
return array( $host, $port );
}
/**********************************************************************
* Print SQL/DB error - over-ridden by specific DB class
*/
function register_error($err_str)
{
// Keep track of last error
$this->last_error = $err_str;
// Capture all errors to an error array no matter what happens
$this->captured_errors[] = array
(
'error_str' => $err_str,
'query' => $this->last_query
);
}
/**********************************************************************
* Turn error handling on or off..
*/
function show_errors()
{
$this->show_errors = true;
}
function hide_errors()
{
$this->show_errors = false;
}
/**********************************************************************
* Kill cached query results
*/
function flush()
{
// Get rid of these
$this->last_result = null;
$this->col_info = null;
$this->last_query = null;
$this->from_disk_cache = false;
}
/**********************************************************************
* Get one variable from the DB - see docs for more detail
*/
function get_var($query=null,$x=0,$y=0)
{
// Log how the function was called
$this->func_call = "\$db->get_var(\"$query\",$x,$y)";
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// Extract var out of cached results based x,y vals
if ( $this->last_result[$y] )
{
$values = array_values(get_object_vars($this->last_result[$y]));
}
// If there is a value return it else return null
return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
}
/**********************************************************************
* Get one row from the DB - see docs for more detail
*/
function get_row($query=null,$output=OBJECT,$y=0)
{
// Log how the function was called
$this->func_call = "\$db->get_row(\"$query\",$output,$y)";
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// If the output is an object then return object using the row offset..
if ( $output == OBJECT )
{
return $this->last_result[$y]?$this->last_result[$y]:null;
}
// If the output is an associative array then return row as such..
elseif ( $output == ARRAY_A )
{
return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
}
// If the output is an numerical array then return row as such..
elseif ( $output == ARRAY_N )
{
return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
}
// If invalid output type was specified..
else
{
$this->show_errors ? trigger_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N",E_USER_WARNING) : null;
}
}
/**********************************************************************
* Function to get 1 column from the cached result set based in X index
* see docs for usage and info
*/
function get_col($query=null,$x=0)
{
$new_array = array();
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// Extract the column values
for ( $i=0; $i < count($this->last_result); $i++ )
{
$new_array[$i] = $this->get_var(null,$x,$i);
}
return $new_array;
}
/**********************************************************************
* Return the the query as a result set - see docs for more details
*/
function get_results($query=null, $output = OBJECT)
{
// Log how the function was called
$this->func_call = "\$db->get_results(\"$query\", $output)";
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// Send back array of objects. Each row is an object
if ( $output == OBJECT )
{
return $this->last_result;
}
elseif ( $output == ARRAY_A || $output == ARRAY_N )
{
if ( $this->last_result )
{
$i=0;
foreach( $this->last_result as $row )
{
$new_array[$i] = get_object_vars($row);
if ( $output == ARRAY_N )
{
$new_array[$i] = array_values($new_array[$i]);
}
$i++;
}
return $new_array;
}
else
{
return array();
}
}
}
/**********************************************************************
* Function to get column meta data info pertaining to the last query
* see docs for more info and usage
*/
function get_col_info($info_type="name",$col_offset=-1)
{
if ( $this->col_info )
{
if ( $col_offset == -1 )
{
$i=0;
foreach($this->col_info as $col )
{
$new_array[$i] = $col->{$info_type};
$i++;
}
return $new_array;
}
else
{
return $this->col_info[$col_offset]->{$info_type};
}
}
}
/**********************************************************************
* store_cache
*/
function store_cache($query,$is_insert)
{
// The would be cache file for this query
$cache_file = $this->cache_dir.'/'.md5($query);
// disk caching of queries
if ( $this->use_disk_cache && ( $this->cache_queries && ! $is_insert ) || ( $this->cache_inserts && $is_insert ))
{
if ( ! is_dir($this->cache_dir) )
{
$this->register_error("Could not open cache dir: $this->cache_dir");
$this->show_errors ? trigger_error("Could not open cache dir: $this->cache_dir",E_USER_WARNING) : null;
}
else
{
// Cache all result values
$result_cache = array
(
'col_info' => $this->col_info,
'last_result' => $this->last_result,
'num_rows' => $this->num_rows,
'return_value' => $this->num_rows,
);
file_put_contents($cache_file, serialize($result_cache));
if( file_exists($cache_file . ".updating") )
unlink($cache_file . ".updating");
}
}
}
/**********************************************************************
* get_cache
*/
function get_cache($query)
{
// The would be cache file for this query
$cache_file = $this->cache_dir.'/'.md5($query);
// Try to get previously cached version
if ( $this->use_disk_cache && file_exists($cache_file) )
{
// Only use this cache file if less than 'cache_timeout' (hours)
if ( (time() - filemtime($cache_file)) > ($this->cache_timeout*3600) &&
!(file_exists($cache_file . ".updating") && (time() - filemtime($cache_file . ".updating") < 60)) )
{
touch($cache_file . ".updating"); // Show that we in the process of updating the cache
}
else
{
$result_cache = unserialize(file_get_contents($cache_file));
$this->col_info = $result_cache['col_info'];
$this->last_result = $result_cache['last_result'];
$this->num_rows = $result_cache['num_rows'];
$this->from_disk_cache = true;
// If debug ALL queries
$this->trace || $this->debug_all ? $this->debug() : null ;
return $result_cache['return_value'];
}
}
}
/**********************************************************************
* Dumps the contents of any input variable to screen in a nicely
* formatted and easy to understand way - any type: Object, Var or Array
*/
function vardump($mixed='')
{
// Start outup buffering
ob_start();
echo "<p><table><tr><td bgcolor=ffffff><blockquote><font color=000090>";
echo "<pre><font face=arial>";
if ( ! $this->vardump_called )
{
echo "<font color=800080><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Variable Dump..</b></font>\n\n";
}
$var_type = gettype ($mixed);
print_r(($mixed?$mixed:"<font color=red>No Value / False</font>"));
echo "\n\n<b>Type:</b> " . ucfirst($var_type) . "\n";
echo "<b>Last Query</b> [$this->num_queries]<b>:</b> ".($this->last_query?$this->last_query:"NULL")."\n";
echo "<b>Last Function Call:</b> " . ($this->func_call?$this->func_call:"None")."\n";
echo "<b>Last Rows Returned:</b> ".count($this->last_result)."\n";
echo "</font></pre></font></blockquote></td></tr></table>".$this->donation();
echo "\n<hr size=1 noshade color=dddddd>";
// Stop output buffering and capture debug HTML
$html = ob_get_contents();
ob_end_clean();
// Only echo output if it is turned on
if ( $this->debug_echo_is_on )
{
echo $html;
}
$this->vardump_called = true;
return $html;
}
/**********************************************************************
* Alias for the above function
*/
function dumpvar($mixed)
{
$this->vardump($mixed);
}
/**********************************************************************
* Displays the last query string that was sent to the database & a
* table listing results (if there were any).
* (abstracted into a seperate file to save server overhead).
*/
function debug($print_to_screen=true)
{
// Start outup buffering
ob_start();
echo "<blockquote>";
// Only show ezSQL credits once..
if ( ! $this->debug_called )
{
echo "<font color=800080 face=arial size=2><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Debug..</b></font><p>\n";
}
if ( $this->last_error )
{
echo "<font face=arial size=2 color=000099><b>Last Error --</b> [<font color=000000><b>$this->last_error</b></font>]<p>";
}
if ( $this->from_disk_cache )
{
echo "<font face=arial size=2 color=000099><b>Results retrieved from disk cache</b></font><p>";
}
echo "<font face=arial size=2 color=000099><b>Query</b> [$this->num_queries] <b>--</b> ";
echo "[<font color=000000><b>$this->last_query</b></font>]</font><p>";
echo "<font face=arial size=2 color=000099><b>Query Result..</b></font>";
echo "<blockquote>";
if ( $this->col_info )
{
// =====================================================
// Results top rows
echo "<table cellpadding=5 cellspacing=1 bgcolor=555555>";
echo "<tr bgcolor=eeeeee><td nowrap valign=bottom><font color=555599 face=arial size=2><b>(row)</b></font></td>";
for ( $i=0; $i < count($this->col_info); $i++ )
{
/* when selecting count(*) the maxlengh is not set, size is set instead. */
echo "<td nowrap align=left valign=top><font size=1 color=555599 face=arial>{$this->col_info[$i]->type}";
if (!isset($this->col_info[$i]->max_length))
{
echo "{$this->col_info[$i]->size}";
} else {
echo "{$this->col_info[$i]->max_length}";
}
echo "</font><br><span style='font-family: arial; font-size: 10pt; font-weight: bold;'>{$this->col_info[$i]->name}</span></td>";
}
echo "</tr>";
// ======================================================
// print main results
if ( $this->last_result )
{
$i=0;
foreach ( $this->get_results(null,ARRAY_N) as $one_row )
{
$i++;
echo "<tr bgcolor=ffffff><td bgcolor=eeeeee nowrap align=middle><font size=2 color=555599 face=arial>$i</font></td>";
foreach ( $one_row as $item )
{
echo "<td nowrap><font face=arial size=2>$item</font></td>";
}
echo "</tr>";
}
} // if last result
else
{
echo "<tr bgcolor=ffffff><td colspan=".(count($this->col_info)+1)."><font face=arial size=2>No Results</font></td></tr>";
}
echo "</table>";
} // if col_info
else
{
echo "<font face=arial size=2>No Results</font>";
}
echo "</blockquote></blockquote>".$this->donation()."<hr noshade color=dddddd size=1>";
// Stop output buffering and capture debug HTML
$html = ob_get_contents();
ob_end_clean();
// Only echo output if it is turned on
if ( $this->debug_echo_is_on && $print_to_screen)
{
echo $html;
}
$this->debug_called = true;
return $html;
}
/**********************************************************************
* Naughty little function to ask for some remuniration!
*/
function donation()
{
return "<font size=1 face=arial color=000000>If ezSQL has helped <a href=\"https://www.paypal.com/xclick/business=justin%40justinvincent.com&item_name=ezSQL&no_note=1&tax=0\" style=\"color: 0000CC;\">make a donation!?</a> <!--[ go on! you know you want to! ]--></font>";
}
/**********************************************************************
* Timer related functions
*/
function timer_get_cur()
{
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
function timer_start($timer_name)
{
$this->timers[$timer_name] = $this->timer_get_cur();
}
function timer_elapsed($timer_name)
{
return round($this->timer_get_cur() - $this->timers[$timer_name],2);
}
function timer_update_global($timer_name)
{
if ( $this->do_profile )
{
$this->profile_times[] = array
(
'query' => $this->last_query,
'time' => $this->timer_elapsed($timer_name)
);
}
$this->total_query_time += $this->timer_elapsed($timer_name);
}
/**********************************************************************
* Creates a SET nvp sql string from an associative array (and escapes all values)
*
* Usage:
*
* $db_data = array('login'=>'jv','email'=>'jv@vip.ie', 'user_id' => 1, 'created' => 'NOW()');
*
* $db->query("INSERT INTO users SET ".$db->get_set($db_data));
*
* ...OR...
*
* $db->query("UPDATE users SET ".$db->get_set($db_data)." WHERE user_id = 1");
*
* Output:
*
* login = 'jv', email = 'jv@vip.ie', user_id = 1, created = NOW()
*/
function get_set($params)
{
if( !is_array( $params ) )
{
$this->register_error( 'get_set() parameter invalid. Expected array in '.__FILE__.' on line '.__LINE__);
return;
}
$sql = array();
foreach ( $params as $field => $val )
{
if ( $val === 'true' || $val === true )
$val = 1;
if ( $val === 'false' || $val === false )
$val = 0;
switch( $val ){
case 'NOW()' :
case 'NULL' :
$sql[] = "$field = $val";
break;
default :
$sql[] = "$field = '".$this->escape( $val )."'";
}
}
return implode( ', ' , $sql );
}
}
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