3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr=array("aa", "az", "an","am", "ba", "by", "alien","i"); usort($arr, function ($a, $b) { return strlen($a) == strlen($b) ? $a <=> $b : strlen($a) <=> strlen($b); }); print_r($arr);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Array ( [0] => i [1] => aa [2] => am [3] => an [4] => az [5] => ba [6] => by [7] => alien )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
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153.43 ms | 407 KiB | 5 Q