PHP Error Control Operator

In PHP, the @ symbol is defined as the Error Control Operator. When it is prefixed to any expression, any error encountered by PHP parser while executing it will be suppressed and the expression will be ignored.

Example Without Error Control Operator

Following code tries to open a non-existing file for read operation, but PHP parser reports warning −

<?php
$fp = fopen("nosuchfile.txt", "r");
echo "Hello World
";
?>

The output of the above code is −

Hello World
PHP Warning: fopen(nosuchfile.txt): failed to open stream: No such file or directory in /home/cg/root/1569997/main.php on line 2

Example With Error Control Operator

Prepending @ symbol to fopen() expression suppresses the error message −

<?php
$fp = @fopen("nosuchfile.txt", "r");
echo "Hello World";
?>

The output of the above code is −

Hello World

Important Considerations

The @ operator only suppresses error messages, but does not handle the actual error. It's recommended to check for errors explicitly using functions like error_get_last() or proper error handling mechanisms when needed.

Conclusion

The error control operator @ is useful for suppressing expected errors, but should be used carefully as it can hide important debugging information. Always implement proper error handling for production code.