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ini_get
(PHP 4, PHP 5, PHP 7)
ini_get — Gets the value of a configuration option
Description
$varname
) : stringReturns the value of the configuration option on success.
Return Values
Returns the value of the configuration option as a string on success, or an
empty string for null values. Returns FALSE
if the
configuration option doesn't exist.
Examples
Example #1 A few ini_get() examples
<?php
/*
Our php.ini contains the following settings:
display_errors = On
register_globals = Off
post_max_size = 8M
*/
echo 'display_errors = ' . ini_get('display_errors') . "\n";
echo 'register_globals = ' . ini_get('register_globals') . "\n";
echo 'post_max_size = ' . ini_get('post_max_size') . "\n";
echo 'post_max_size+1 = ' . (ini_get('post_max_size')+1) . "\n";
echo 'post_max_size in bytes = ' . return_bytes(ini_get('post_max_size'));
function return_bytes($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;
}
?>
The above example will output something similar to:
display_errors = 1 register_globals = 0 post_max_size = 8M post_max_size+1 = 9 post_max_size in bytes = 8388608
Notes
Note: 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". The function can also return the literal string of INI value.
Note: 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 above shows one way to convert shorthand notation into bytes, much like how the PHP source does it.
Note:
ini_get() can't read "array" ini options such as pdo.dsn.*, and returns
FALSE
in this case.
Changelog
Version | Description |
---|---|
5.3.0 | Previously, the empty string was returned if the configuration
option didn't exist. now, FALSE is returned instead.
|
See Also
- get_cfg_var() - Gets the value of a PHP configuration option
- ini_get_all() - Gets all configuration options
- ini_restore() - Restores the value of a configuration option
- ini_set() - Sets the value of a configuration option
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