3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arrarr = array( array('a' => 0), array('a' => 1, 'b' => 2), array('a' => 2, 'b' => 3, 'c' => 4), array('a' => 3, 'b' => 4, 'c' => 5, 'd' => 6) ); foreach ($arrarr as $row) { foreach ($row as $key => &$value) { if ($key === 'b' || $key === 'd') { $value = 'foo'; } } print(implode(",", $row) . "\n"); } var_dump($arrarr);
based on YOYbR
Output for 5.0.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
0 1,foo 2,foo,4 3,foo,5,foo array(4) { [0]=> array(1) { ["a"]=> int(0) } [1]=> array(2) { ["a"]=> int(1) ["b"]=> int(2) } [2]=> array(3) { ["a"]=> int(2) ["b"]=> int(3) ["c"]=> int(4) } [3]=> array(4) { ["a"]=> int(3) ["b"]=> int(4) ["c"]=> int(5) ["d"]=> int(6) } }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/8IX9l on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/8IX9l on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/8IX9l on line 11
Process exited with code 255.