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run code in 300+ PHP versions simultaneously

@ 2016-10-07T08:12:48Z

<?php
$expression = "/(?J)\b(?:
(?<obj>i)(?:(?<part>'m)|\s(?<part>am|was))?
|(?<obj>you|they)(?:(?<part>'re)|\s(?<part>are|were))?
|(?<obj>it|he|she)(?:(?<part>'s)|\s(?<part>is|was))?
|(?<obj>(my|your|it)sel(f|ves))
)\b/uix";

$message = "that you are not who you think you're but I'm not myself either";
echo $output = preg_replace_callback($expression,
    function ($matches){
        $o = '';
        $object = strtolower($matches['obj']);
        
        switch($object){
            case 'i': 
                $o = 'you';
                break;
            case 'you': 
                $o = 'I'; 
                break;
            case 'yourself': 
                $o = 'myself'; 
                break;
            case 'myself': 
                $o = 'yourself'; 
                break;
            default:
                $o = $object;
        }
        
        if(isset($matches['part'])){
            switch($part = strtolower($matches['part'])){
                case "'re":
                case "are":
                    if($object == 'you') 
                    $o .= ' am'; 
                    break;
                case 'am':
                    $o .= ' are'; 
                    break;
                case "'m":
                    $o .= "'re"; 
                    break;
                case 'was': 
                    if(!in_array($object, ['he','she','it'])) 
                        $o .= ' were'; 
                    
                    break;
                case 'were':
                    if($object == 'you') 
                        $o .= ' was'; 
                        
                    break;
            }
        }
        return $o;
    }, $message
);

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: that I am not who I think I am but you're not yourself either
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 that I am not who I think I am but you're not yourself either

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239.97 ms | 402 KiB | 291 Q