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<?php

/**

*

* This file is part of the phpBB Forum Software package.

*

* @copyright (c) phpBB Limited <https://www.phpbb.com>

* @license GNU General Public License, version 2 (GPL-2.0)

*

* For full copyright and license information, please see

* the docs/CREDITS.txt file.

*

*/

namespace phpbb\php;

/**

* Wrapper class for ini_get function.

*

* Provides easier handling of the different interpretations of ini values.

*/

class ini

{

/**

* Simple wrapper for ini_get()

* See http://php.net/manual/en/function.ini-get.php

*

* @param string $varname The configuration option name.

* @return bool|string False if configuration option does not exist,

* the configuration option value (string) otherwise.

*/

public function get($varname)

{

return ini_get($varname);

}

/**

* Gets the configuration option value as a trimmed string.

*

* @param string $varname The configuration option name.

* @return bool|string False if configuration option does not exist,

* the configuration option value (string) otherwise.

*/

public function get_string($varname)

{

$value = $this->get($varname);

if ($value === false)

{

return false;

}

return trim($value);

}

/**

* Gets configuration option value as a boolean.

* Interprets the string value 'off' as false.

*

* @param string $varname The configuration option name.

* @return bool False if configuration option does not exist.

* False if configuration option is disabled.

* True otherwise.

*/

public function get_bool($varname)

{

$value = $this->get_string($varname);

if (empty($value) || strtolower($value) == 'off')

{

return false;

}

return true;

}

/**

* Gets configuration option value as an integer.

*

* @param string $varname The configuration option name.

* @return bool|int False if configuration option does not exist,

* false if configuration option value is not numeric,

* the configuration option value (integer) otherwise.

*/

public function get_int($varname)

{

$value = $this->get_string($varname);

if (!is_numeric($value))

{

return false;

}

return (int) $value;

}

/**

* Gets configuration option value as a float.

*

* @param string $varname The configuration option name.

* @return bool|float False if configuration option does not exist,

* false if configuration option value is not numeric,

* the configuration option value (float) otherwise.

*/

public function get_float($varname)

{

$value = $this->get_string($varname);

if (!is_numeric($value))

{

return false;

}

return (float) $value;

}

/**

* Gets configuration option value in bytes.

* Converts strings like '128M' to bytes (integer or float).

*

* @param string $varname The configuration option name.

* @return bool|int|float False if configuration option does not exist,

* false if configuration option value is not well-formed,

* the configuration option value otherwise.

*/

public function get_bytes($varname)

{

$value = $this->get_string($varname);

if ($value === false)

{

return false;

}

if (is_numeric($value))

{

// Already in bytes.

return phpbb_to_numeric($value);

}

else if (strlen($value) < 2)

{

// Single character.

return false;

}

else if (strlen($value) < 3 && $value[0] === '-')

{

// Two characters but the first one is a minus.

return false;

}

$value_lower = strtolower($value);

$value_numeric = phpbb_to_numeric($value);

switch ($value_lower[strlen($value_lower) - 1])

{

case 'g':

$value_numeric *= 1024;

case 'm':

$value_numeric *= 1024;

case 'k':

$value_numeric *= 1024;

break;

default:

// It's not already in bytes (and thus numeric)

// and does not carry a unit.

return false;

}

return $value_numeric;

}

}