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run code in 300+ PHP versions simultaneously
<?php $x = array_fill(0, 1, '..'); $x[] = 'a'; var_dump($x);

Looking for PHP 7.0.6 bugs?

Version 7.0.6 was released twice by the PHP Team. We're using the latest version;
meaning this script no longer shows the bug which the original release had.

The bugs that were fixed in the second release are 72116 and 72119.

Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.23, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 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
array(2) { [0]=> string(2) ".." [1]=> string(1) "a" }
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 array(2) { [0]=> string(2) ".." [1]=> string(1) "a" }
preferences:
168.86 ms | 402 KiB | 216 Q