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run code in 300+ PHP versions simultaneously
<?php $array = array(1=>"test",2=>"test2"); $array[1]=&$array; $array[2]=&$array[1]; $array[2]=$array[1] print_r($array);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
Parse error: syntax error, unexpected 'print_r' (T_STRING) in /in/nblTM on line 6
Process exited with code 255.

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