3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = []; $x = 63; for ($x = 0; $x < 10000; $x++) { $a[] = substr($x, 0, 1); $a[] = substr($x, 1, 1); // $x_arr = str_split($x); // $a[] = $x_arr[0]; // $a[] = $x_arr[1]; } echo count($a);
Output for 5.6.38, 7.0.33, 7.1.25 - 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
20000
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 20000

preferences:
186.21 ms | 402 KiB | 183 Q