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run code in 300+ PHP versions simultaneously
<?php $pwd=array('456'); var_dump(md5($pwd)); var_dump(substr(md5($pwd), 5, 20));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: md5(): Argument #1 ($string) must be of type string, array given in /in/ET69D:4 Stack trace: #0 /in/ET69D(4): md5(Array) #1 {main} thrown in /in/ET69D on line 4
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: md5() expects parameter 1 to be string, array given in /in/ET69D on line 4 NULL Warning: md5() expects parameter 1 to be string, array given in /in/ET69D on line 5 bool(false)

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