ini_get
(PHP 4, PHP 5)
ini_get -- Gets the value of a configuration option
Description
string
ini_get ( string varname )
Returns the value of the configuration option on success. Failure, such
as querying for a non-existent value, will return an empty string.
When querying boolean values:
A boolean ini value of off will be returned as an
empty string or "0" while a boolean ini value of on will
be returned as "1".
When querying memory size values:
Many ini memory size values, such as
upload_max_filesize, are
stored in the php.ini file in shorthand notation.
ini_get() will return the exact string stored in the
php.ini file and NOT its integer
equivalent. Attempting normal arithmetic functions on these values
will not have otherwise expected results. The example below shows one
way to convert shorthand notation into bytes, much like how the PHP
source does it.
Example 1. A few ini_get() examples
<?php
/*
Our php.ini contains the following settings:
display_errors = On
register_globals = Off
post_max_size = 8M
*/
echo 'display_errors = ' . ini_get('display_errors') . "\n";
echo 'register_globals = ' . ini_get('register_globals') . "\n";
echo 'post_max_size = ' . ini_get('post_max_size') . "\n";
echo 'post_max_size+1 = ' . (ini_get('post_max_size')+1) . "\n";
echo 'post_max_size in bytes = ' . return_bytes(ini_get('post_max_size'));
function return_bytes($val) {
$val = trim($val);
$last = strtolower($val{strlen($val)-1});
switch($last) {
// The 'G' modifier is available since PHP 5.1.0
case 'g':
$val *= 1024;
case 'm':
$val *= 1024;
case 'k':
$val *= 1024;
}
return $val;
}
?>
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This script will produce:
display_errors = 1
register_globals = 0
post_max_size = 8M
post_max_size+1 = 9
post_max_size in bytes = 8388608 |
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See also
get_cfg_var(),
ini_get_all(),
ini_restore(), and
ini_set().