CODEWITHSUNDEEP
php
Tommy
Tommy

Reputation:

why @ before functions

What does adding @ before a function do? I've seen this in some scripts

example:

$connect = @mysql_connect('localhost', 'root', 'password');
 instead of
$connect = mysql_connect('localhost', 'root', 'password');

Upvotes: 3

Views: 181

Answers (2)

Luca C.
Luca C.

Reputation: 12574

this is the Error Control Operator, from php documentation:

PHP supports one error control operator: the at sign (@). When prepended to an expression in PHP, any error messages that might be generated by that expression will be ignored.

If you have set a custom error handler function with set_error_handler() then it will still get called, but this custom error handler can (and should) call error_reporting() which will return 0 when the call that triggered the error was preceded by an @.

If the track_errors feature is enabled, any error message generated by the expression will be saved in the variable $php_errormsg. This variable will be overwritten on each error, so check early if you want to use it.

Upvotes: 0

Paolo Bergantino
Paolo Bergantino

Reputation: 488414

It suppresses any errors that might happen inside the function. Documentation here.

All things considered, this is not recommended as it can lead to some sneaky bugs.

Upvotes: 12

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