3v4l.org

run code in 300+ PHP versions simultaneously
<?php $types = array( 'boolean' => true, 'integer' => 1, 'double' => 2.2, 'NULL' => NULL); foreach ($types as $key => $type) { echo "$key -> " . var_export($type, 1) . "\n"; }
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 - 5.4.21, 5.5.0 - 5.5.5, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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
boolean -> true integer -> 1 double -> 2.2 NULL -> NULL
Output for 5.6.28, 7.0.14 - 7.0.20
boolean -> true integer -> 1 double -> 2.2000000000000002 NULL -> NULL
Output for 5.4.22 - 5.4.45, 5.5.6 - 5.5.38, 5.6.0 - 5.6.25, 7.0.0 - 7.0.10
boolean -> true integer -> 1 double -> 2.20000000000000017763568 NULL -> NULL
preferences:
263.24 ms | 402 KiB | 356 Q