How to random array?

[achoo254]

thank so much!, i using code:

<?php
$display = 'hello word - hello word - hello word';
global $find, $replace;
$find = 'h'; 
$replace = array('1','2','3','4');
$output = preg_replace_callback("/$find/", create_function(
            '$matches',
            'global $find, $replace; return $find . array_rand($replace);'
        ),
        $display
    );
	
echo $output;

How to $find is array?

Example:

h1ello word - h2ello word - h3ello word

to:

h1ello3 wo2rd - h2ello1 wo3rd - h3ello2 wo1rd