3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(E_ALL); // Simple array: $array = array('1' => 'satu', '2' => 'dua'); $count = count($array); for ($i = 0; $i < $count; $i++) { echo "\nChecking $i: \n"; echo "Bad: " . $array['$i'] . "\n"; echo "Good: " . $array[$i] . "\n"; echo "Bad: {$array['$i']}\n"; echo "Good: {$array[$i]}\n"; }
Output for 5.3.0 - 7.1.0
Checking 0: Notice: Undefined index: $i in /in/cM9oQ on line 8 Bad: Notice: Undefined offset: 0 in /in/cM9oQ on line 9 Good: Notice: Undefined index: $i in /in/cM9oQ on line 10 Bad: Notice: Undefined offset: 0 in /in/cM9oQ on line 11 Good: Checking 1: Notice: Undefined index: $i in /in/cM9oQ on line 8 Bad: Good: satu Notice: Undefined index: $i in /in/cM9oQ on line 10 Bad: Good: satu
Output for 4.3.0 - 5.2.17
Checking 0: Notice: Undefined index: $i in /in/cM9oQ on line 8 Bad: Notice: Undefined offset: 0 in /in/cM9oQ on line 9 Good: Notice: Undefined index: $i in /in/cM9oQ on line 10 Bad: Notice: Undefined offset: 0 in /in/cM9oQ on line 11 Good: Checking 1: Notice: Undefined index: $i in /in/cM9oQ on line 8 Bad: Good: satu Notice: Undefined index: $i in /in/cM9oQ on line 10 Bad: Good: satu