PHP Replace number within string with max value

Question

I want to replace any number bigger than X with X in a string if it matches a pattern.

Example with X = 4000 and matching function(?)

I have a string like this:

 $code = "function(4500),function(3900),function2(12345)";

I want a string like this:

 $code = "function(4000),function(3900),function2(12345)";

I have tried this but it doesn't work:

preg_replace('function\(\d+>4000\)', '4000', $code)

Answer 1

You can use the function preg_replace_callback() here:

$str = 'String "function(4500),function(3900),function(12345)"';
$x = 4000;

$str = preg_replace_callback('/[0-9]+/', function($match) use($x) {
    return min($match[0], $x);
}, $str);

echo $str;

Output:

String "function(4000),function(3900),function(4000)"