3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(10, 20); $n = 0; foreach($a as &$v) { echo $v; $a[] = 42; var_dump($a); if ($n++ > 3) {break;} }
Output for 5.2.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
10array(3) { [0]=> &int(10) [1]=> int(20) [2]=> int(42) } 20array(4) { [0]=> int(10) [1]=> &int(20) [2]=> int(42) [3]=> int(42) } 42array(5) { [0]=> int(10) [1]=> int(20) [2]=> &int(42) [3]=> int(42) [4]=> int(42) } 42array(6) { [0]=> int(10) [1]=> int(20) [2]=> int(42) [3]=> &int(42) [4]=> int(42) [5]=> int(42) } 42array(7) { [0]=> int(10) [1]=> int(20) [2]=> int(42) [3]=> int(42) [4]=> &int(42) [5]=> int(42) [6]=> int(42) }
Output for 5.0.0 - 5.2.1
10array(3) { [0]=> &int(10) [1]=> int(20) [2]=> int(42) } 20array(4) { [0]=> &int(10) [1]=> int(20) [2]=> int(42) [3]=> int(42) }
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/RM7eP on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/RM7eP on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/RM7eP on line 4
Process exited with code 255.