3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array=array("number"=>"3","string"=>"abc","null"=>null); $ncache=array(); $scache=array(); foreach(range(1,10000) as $it) { $ncache[]=$array; $scache[]=$array; } function ncompress(&$v) { if(is_numeric($v)) $v=floatval($v); elseif(is_string($v)) $v=trim($v); elseif(is_null($v)) $v=null; } function scompress(&$v) { if(is_numeric($v)) $v=floatval($v); elseif(is_string($v)) $v=trim($v); elseif(is_null($v)) $v=""; } array_walk_recursive($ncache,"ncompress"); array_walk_recursive($scache,"scompress"); echo "Length of null : ".strlen(json_encode($ncache)) .' ('.strlen(gzdeflate(json_encode($ncache))).')' .' ('.strlen(gzencode(json_encode($ncache),9)).')'; echo "\n"; echo "Length of string: ".strlen(json_encode($scache)) .' ('.strlen(gzdeflate(json_encode($scache))).')' .' ('.strlen(gzencode(json_encode($scache),9)).')';
Output for 5.2.0 - 7.1.0
Length of null : 400001 (1223) (1241) Length of string: 380001 (1163) (1181)
Output for 5.0.1 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/WZeQH on line 24
Process exited with code 255.
Output for 5.0.0

Process exited with code 139.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_walk_recursive() in /in/WZeQH on line 22
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: array_walk_recursive() in /in/WZeQH on line 22
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_walk_recursive() in /in/WZeQH on line 22