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run code in 300+ PHP versions simultaneously
<?php $a = array('contract' => 1); $b = !empty($a['xxx']) ? $a['xx'] : 'ble'; var_dump($b)
Output for 5.4.0 - 5.4.24
Parse error: syntax error, unexpected end of file in /in/qsdtA on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected $end in /in/qsdtA on line 5
Process exited with code 255.

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