note 21361 added to function.function-exists

If you know a function exists but want to see if it is available you should execute it and compare it's return value to false. eg: The getmxrr() function on a Windows platform exists but is not available (as of 4.2.0). To check: $result = @getmxrr("me@hotmail.com"); if ( false === $result ) { # do unavailable function handling } The @ silences the unavailable function warning. -- http://www.php.net/manual/en/function.function-exists.php http://master.php.net/manage/user-notes.php?action=edit+21361 http://master.php.net/manage/user-notes.php?action=delete+21361 http://master.php.net/manage/user-notes.php?action=reject+21361