3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $hashes = array(); $collisions = 0; for($i=0; $i < 600000; $i++){ $hash = hash("crc32", $i); if (in_array($hash, $hashes)) { $collisions++; } else { array_push($hashes, $hash); } } echo $collisions; ?>
based on SV9Yj
Output for 5.1.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0

Process exited with code 137.
Output for 5.0.0 - 5.1.1
Fatal error: Call to undefined function hash() in /in/NlpBa on line 7
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: hash() in /in/NlpBa on line 7
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: hash() in /in/NlpBa on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: hash() in /in/NlpBa on line 7