Where does phpinfo() get its info?

If you run a phpinfo(); does it show exactly开发者_运维知识库 what is in the php.ini or if settings are changed on the fly via php with methods like ini_set() or via .htaccess will they be shown in phpinfo?

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phpinfo() shows, in the "Local Value" column, the current configuration ; i.e.

• what is in php.ini
• eventually, overriden in Apache's VirtualHost or in .htaccess files
• eventually, overriden by ini_set

In the end, it shows the configuration values that would be / are used by your script.

As a sidenote : it also display informations that are not-really "configuration" per-se, like the configure line that was used to compile PHP, the version of the Zend Engine, ...

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It will show the current running environment, not just what is in php.ini. Anything that changes the environment like the methods you mentioned will be reflected.

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I think that's what the meaning of the "global" and "local" columns is - "global" is what's set in the central php.ini, "local" is whatever changes have been applied to the global setting using one of the methods you describe.

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If you use ini_set(), the changes are made on-the-fly for the current script only, it does not permanently change php.ini settings. The phpinfo() shows current settings of what is there in the php.ini file which is also influenced by apache and ini_set function.

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phpinfo() always display the settings value in 2 column. First column is the global value that set in php.ini file. Second column is per user value, that set in php.ini or can be override by .htaccess file or override through ini_set before calling phpinfo().

Please note that not all settings value can be override by .htaccess or ini_set. See the complete list here and take a look at Changeable column. See the explanation og the Changeable column value here.

Try it by yourself.