3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php defined('PHP_INT_MAX') or define('PHP_INT_MAX', is_int(0x7FFFFFFF + 1) ? 0x7FFFFFFFFFFFFFFF : 0x7FFFFFFF); var_dump(PHP_INT_MAX); $a = array(PHP_INT_MAX => 42); $a[] = 37; var_dump($a);
Output for 5.2.10 - 7.2.0
int(9223372036854775807) Warning: Cannot add element to the array as the next element is already occupied in /in/Hl0uL on line 6 array(1) { [9223372036854775807]=> int(42) }
Output for 4.3.0 - 5.2.9
int(9223372036854775807) array(2) { [9223372036854775807]=> int(42) [-9223372036854775808]=> int(37) }