3v4l.org

run code in 300+ PHP versions simultaneously
<?php function hash2($n) { for ($i = 0; $i < $n; $i++) { $hash1["foo_$i"] = $i; $hash2["foo_$i"] = 0; } for ($i = $n; $i > 0; $i--) { foreach($hash1 as $key => $value) { $hash2[$key] += $value; } } $first = "foo_0"; $last = "foo_".($n-1); print "{$hash1[$first]} {$hash1[$last]} {$hash2[$first]} {$hash2[$last]}\n"; } hash2(1000);
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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 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 - 8.3.7
0 999 0 999000
preferences:
325.58 ms | 406 KiB | 453 Q