PHP Anonymous function with array_walk

I'm trying to use array_walk with an anonymous function, but I always get the error

 // Parse error: syntax error, unexpected T_FUNCTION in ... on line X
 if(!empty($myArray)) {
   array_walk($myArray, function(&$value, $key){ // Line X
     $value = '"'.$value.'"'; // Add quotes
   });
 }

The surrounding file synt开发者_C百科ax is correct. Any thoughts?

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Yes, true anonymous functions (closures) are only available from PHP 5.3, however you can still create an anonymous function in earlier versions of PHP using the create_function() call, which can be used with array_walk(). Something like:

array_walk($myArray, create_function('&$value,$key', '$value = \'"\'.$value.\'"\';'));

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Check your PHP version... Anonymous functions are only available since 5.3...