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Instead, use the superglobals that were ; introduced in PHP 4. With some errors, the error message ; content may expose information about your script, web server, or database ; server that may be exploitable for hacking. Production sites should have this ; directive set to off. Any errors that occur during the ; execution of your script will be logged typically, to your server's error log, ; but can be configured in several ways.


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Enabling output buffering typically results in less ; writes, and sometimes less packets sent on the wire, which can often lead to ; better performance. The gain this directive actually yields greatly depends ; on which Web server you're working with, and what kind of scripts you're using. Instead, you should use the ; function addslashes on each input element you wish to send to a database. To access ; environment variables, you can use getenv instead.

These error messages ; are emitted for non-critical errors, but that could be a symptom of a bigger ; problem. Most notably, this will cause error messages about the use ; of uninitialized variables to be displayed. The PHP 4 style to do this is by making the ; function require the relevant argument by reference. For portable, redistributable code, ; be sure not to use short tags.

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You can enable output buffering during runtime by calling the output ; buffering functions. You can also enable output buffering for all files by ; setting this directive to On. If you wish to limit the size of the buffer ; to a certain size - you can use a maximum number of bytes instead of 'On', as ; a value for this directive e.

PHP ; outputs chunks that are few hundreds bytes each as a result of ; compression. Turning this option on has serious performance ; implications and is generally recommended for debugging purposes only. The default value ensures that when floats ; are decoded with unserialize, the data will remain the same. The encouraged method of ; specifying which arguments should be passed by reference is in the function ; declaration.

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You're encouraged to try and turn this option Off and make ; sure your scripts work properly with it in order to ensure they will work ; with future versions of the language you will receive a warning each time ; you use this feature, and the argument will be passed by value instead of by ; reference. In Safe Mode, ; the user may only alter environment variables whose names begin with the ; prefixes supplied here. This directive makes most sense if used in a per-directory ; or per-virtualhost web server configuration file.

Consider enabling it if executing long request, which may end up ; being interrupted by the user or a browser timing out. This value should ; be increased on systems where PHP opens many files to reflect the quantity of ; the file operations performed.

For systems with rarely changing files, consider increasing this ; value. It is no security ; threat in any way, but it makes it possible to determine whether you use PHP ; on your server or not. For production web sites, ; you're strongly encouraged to turn this feature off, and use error logging ; instead see below. The default is and 0 allows to not apply any maximum length at all. When this setting ; is On you will not log errors with repeated messages from different files or ; source lines. You must also specify the file extension being used including ; the dot.

Registration is done from left to right, newer ; values override older values. You may ; want to turn this off if you don't want to clutter your scripts' global scope ; with user data.

Guide Sécurité PHP 5 et MySQL (Blanche) (French Edition)

If you're not using them, it's recommended to turn them off, ; for performance reasons. If you don't use these variables, you ; should turn it off for increased performance. If these variables ; are not used within a script, having this directive on will result in a ; performance gain. To disable sending of the charset, simply ; set it to be empty. The alternate is to use the ; cgi. Left undefined, PHP turns this on by default.

This allows IIS to define the ; security context that the request runs under. Default is zero. Turning it off is a good idea performance-wise. You may supply arguments as well default: "sendmail -t -i". These parameters will always replace the value of ; the 5th parameter to mail , even in safe mode.

Returns number of bytes to variables. Prix To access ; environment variables, you can use getenv instead. These error messages ; are emitted for non-critical errors, but that could be a symptom of a bigger ; problem.

Most notably, this will cause error messages about the use ; of uninitialized variables to be displayed. The PHP 4 style to do this is by making the ; function require the relevant argument by reference. For portable, redistributable code, ; be sure not to use short tags. You can enable output buffering during runtime by calling the output ; buffering functions. You can also enable output buffering for all files by ; setting this directive to On. If you wish to limit the size of the buffer ; to a certain size - you can use a maximum number of bytes instead of 'On', as ; a value for this directive e.

PHP ; outputs chunks that are few hundreds bytes each as a result of ; compression. Turning this option on has serious performance ; implications and is generally recommended for debugging purposes only. The default value ensures that when floats ; are decoded with unserialize, the data will remain the same. The encouraged method of ; specifying which arguments should be passed by reference is in the function ; declaration.

You're encouraged to try and turn this option Off and make ; sure your scripts work properly with it in order to ensure they will work ; with future versions of the language you will receive a warning each time ; you use this feature, and the argument will be passed by value instead of by ; reference. In Safe Mode, ; the user may only alter environment variables whose names begin with the ; prefixes supplied here.

This directive makes most sense if used in a per-directory ; or per-virtualhost web server configuration file.

Sécurité PHP 5 et MySQL by Damien Seguy

Consider enabling it if executing long request, which may end up ; being interrupted by the user or a browser timing out. This value should ; be increased on systems where PHP opens many files to reflect the quantity of ; the file operations performed. For systems with rarely changing files, consider increasing this ; value. It is no security ; threat in any way, but it makes it possible to determine whether you use PHP ; on your server or not. For production web sites, ; you're strongly encouraged to turn this feature off, and use error logging ; instead see below.

The default is and 0 allows to not apply any maximum length at all.

When this setting ; is On you will not log errors with repeated messages from different files or ; source lines. You must also specify the file extension being used including ; the dot.

Comment corriger une erreur 500 internal server sur votre site WordPress

Registration is done from left to right, newer ; values override older values. You may ; want to turn this off if you don't want to clutter your scripts' global scope ; with user data. If you're not using them, it's recommended to turn them off, ; for performance reasons. If you don't use these variables, you ; should turn it off for increased performance.

If these variables ; are not used within a script, having this directive on will result in a ; performance gain. To disable sending of the charset, simply ; set it to be empty.