PHP error syntax error, unexpected T_goto, expecting t_string, error file and line number pointing to the above code, what is the reason

PHP error syntax error, unexpected T_goto, expecting t_string, error file and line number point to the following code, what is the reason?
Native PHP version is 5.3.8,apache/2.2.21, I guess is the environmental problem, because it is normal operation, is put on another computer when the problem occurs
How to solve it? Worry Ah!

Public Function goto ($url, $msg =null) {
if ($msg) {
$this->jsalert ($msg);
}
$this->js (' document.location= '. $url. '";');
$this->output (TRUE);
Exit
}

------Solution--------------------
Starting with php5.3 PHP restores goto instructions discarded by structured programming over the years
Now that Goto has been upgraded to a reserved word, you can't use it as a function (method) name

The goto operator can be used to jump to a specified location in a program. The target location can be tagged with the target name plus a colon. The Goto in PHP has a certain limit and can only jump in the same file and scope, meaning you can't jump out of a function or class method, or jump into another function. You can't jump into any loop or switch structure either. A common use is to jump out of a loop or switch, instead of a multi-layered break.

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