php error control operator

PHP supports an error control operator: @. When placed before a PHP expression, any error message that expression may produce is ignored.

If you set a custom error handling function with set_error_handler(), it will still be called, but this error handling function can (and should) call error_reporting(), and this function will return when there is @ before the error statement 0.

If the track_errors feature is activated, any error messages generated by the expression are stored in the variable $php_errormsg. This variable is overwritten on every error, so check it as early as possible if you want to use it.

<?php
/* Intentional file error */
$my_file = @file (&#39;non_existent_file&#39;) or
    die ("Failed opening file: error was &#39;$php_errormsg&#39;");
// this works for any expression, not just functions:
$value = @$cache[$key];
// will not issue a notice if the index $key doesn&#39;t exist.
?>

Note: The @ operator is only valid for expressions. A simple rule for beginners is: if you can get a value from somewhere, prepend it with the @ operator. For example, you can put it before variables, function and include calls, constants, etc. It cannot be placed before the definition of a function or class, nor can it be used in conditional structures such as if and foreach.

Warning

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