3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ( $i = 0; $i < 3000; $i++ ) { $test_array[ "key$i" ] = $i; } $test1 = $test_array; for ( $i = 0; $i < 3000; $i++ ) { $k = key($test1); $dummy = $test1[$k]; unset($test1[$k]); }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 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 - 8.3.6
preferences:
229.82 ms | 406 KiB | 313 Q