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run code in 300+ PHP versions simultaneously
<?php $string 'ab'; unset($string[0]); var_dump($string):
Output for 5.4.0 - 5.4.23
Parse error: syntax error, unexpected ''ab'' (T_CONSTANT_ENCAPSED_STRING) in /in/FJ0Ao on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in /in/FJ0Ao on line 2
Process exited with code 255.

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