How can I replace preg_replace with preg_replace_callback in PHP5.4?

Question

I have a PHP page in which I am using following command:-

$abc = preg_replace('/&#(\d+);/me', "chr(\\1)", $abc);

Now I want to replace the above command with the "preg_replace_callback" function as preg_replace is deprecated in PHP 5.4 .

How can I achieve it?

EnKrypt · Answer 1 · 2014-10-21T11:19:53.753

-1

Try using anonymous functions like this :

$abc = preg_replace_callback(
    '/&#(\d+);/me',
    function ($match) 
    { 
        return chr($match[1]);
    },
    $abc
);

edited Oct 21 '14 at 11:19

answered Oct 21 '14 at 10:55

EnKrypt

Thanks a lot for the reply. I used the code you specified but I am getting an error in it saying:preg_replace_callback() "Requires argument 2, 'function($a) { return chr($a[1]); }', to be a valid callback" – Gaurang Oct 21 '14 at 11:02
Not sure why that was happening. Maybe $a is a reserved variable. Try the edited code. – EnKrypt Oct 21 '14 at 11:15
Actually it is giving me error at the function keyword saying incorrect syntax.Do I need to put the entire thing in single quotes? – Gaurang Oct 21 '14 at 11:16
Not quite. [The documentation](http://php.net/manual/en/function.preg-replace-callback.php) requires it to be an actual function without quotes. Allow me to add indentation to the code. – EnKrypt Oct 21 '14 at 11:18
Yup I too saw the definition. But I am getting the same issue. – Gaurang Oct 21 '14 at 11:40
Hey I sorted out the above mentioned issue. But now I am getting the error : "Modifier /e cannot be used with replacement callback" – Gaurang Oct 21 '14 at 12:05

1 Answers1