3v4l.org

run code in 300+ PHP versions simultaneously
<?php // First array, wont use unset $arr = array( 'a' => array('value' => 2), 'b' => array('value' => 4), 'c' => array('value' => 6) ); // Second copy, for unset $arr2 = $arr; // Loop and display without unset foreach ($arr as &$a) { $a['value'] /= 2; } echo "Without Unset:"; foreach ($arr as $a) { print_r($a); } // Loop and display with unset foreach ($arr2 as &$b) { $b['value'] /= 2; } unset($b); echo "With Unset:"; foreach ($arr2 as $b) { print_r($b); }
Output for 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 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.3.7
Without Unset:Array ( [value] => 1 ) Array ( [value] => 2 ) Array ( [value] => 2 ) With Unset:Array ( [value] => 1 ) Array ( [value] => 2 ) Array ( [value] => 3 )
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/69vW4 on line 13
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/69vW4 on line 13
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/69vW4 on line 13
Process exited with code 255.
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216.99 ms | 401 KiB | 357 Q