Php uses ini_get to obtain the variable value in php. ini

This article mainly introduces how php uses ini_get to obtain the variable value in php. ini. The example shows how to use the ini_get function. For more information, see

This article mainly introduces how php uses ini_get to obtain the variable value in php. ini. The example shows how to use the ini_get function. For more information, see

This example describes how php uses ini_get to obtain the variable value in php. ini. Share it with you for your reference. The specific analysis is as follows:

To get php. you can use phpinfo (); to obtain all the php configuration information, but how do you get a variable value?

Php provides a function to obtain the variable value in php. ini: ini_get ()

The usage of ini_get () is very simple. The following example shows how to use it.

Syntax:

String ini_get (string varname)

The return value is 0 or 1 if it is boolean.

Instance:

<? Php/* Our php. ini contains the following settings: display_errors = Onregister_globals = Offpost_max_size = 8 M */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_byt Es (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 5.1.0case 'G ': $ val * = 1024; case 'M': $ val * = 1024; case 'K': $ val * = 1024;} return $ val ;}?>

The running result of the above Code is similar to the following:

Display_errors = 1register_globals = 0post_max_size = 8Mpost_max_size + 1 = 9post_max_size in bytes = 8388608

If you want to obtain the variable value in the entire php. ini file, use the ini_get enhancement function ini_get_all ().

The ini_get_all () function returns the environment variables of the entire php in the form of arrays, which is also easy to use.

Instance 1:

<? Phpprint_r (ini_get_all ("pcre"); print_r (ini_get_all ();?>

The running result of the above Code is similar to the following:

Array ([pcre. backtrack_limit] => Array ([global_value] => 100000 [local_value] => 100000 [access] => 7) [pcre. recursion_limit] => Array ([global_value] => 100000 [local_value] => 100000 [access] => 7 )) array ([allow_call_time_pass_reference] => Array ([global_value] => 0 [local_value] => 0 [access] => 6) [allow_url_fopen] => Array ([global_value] => 1 [local_value] => 1 [access] => 4 )...)

Example 2:

<? Phpprint_r (ini_get_all ("pcre", false); // Added in PHP 5.3.0print _ r (ini_get_all (null, false); // Added in PHP 5.3.0?>

The output result is similar to the following:

Array ([pcre. backtrack_limit] => 100000 [pcre. recursion_limit] => 100000) Array ([allow_call_time_pass_reference] => 0 [allow_url_fopen] => 1 ...)

The function opposite to ini_get () is ini_set (), and ini_set has the function of changing php. ini settings. For example, when a script times out, you can set its maximum execution time.

I hope this article will help you with php programming.