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run code in 300+ PHP versions simultaneously
<?php $foo = ['apple']; $test =& $foo; $bar = $foo; $bar[0] = 'orange'; var_dump($test[0]); $foo = ['apple']; $bar = $foo; $test =& $foo[0]; $bar[0] = 'orange'; var_dump($test); $foo = ['apple']; $test =& $foo[0]; $bar = $foo; $bar[0] = 'orange'; var_dump($test);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
string(5) "apple" string(5) "apple" string(6) "orange"

preferences:
150.58 ms | 404 KiB | 192 Q