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run code in 300+ PHP versions simultaneously
<?php echo strstr('Important: you are NOT allowed to use a built-in function that converts the string (or just one character) to lowercase (such as ToLower() in .NET, strtolower() in PHP , ...)! You\'re allowed to use all other built-in functions, however.', array_combine(range('A', 'Z'), range('a', 'z')));
Output for git.master_jit, git.master, rfc.property-hooks
Fatal error: Uncaught TypeError: strstr(): Argument #2 ($needle) must be of type string, array given in /in/3fN09:2 Stack trace: #0 /in/3fN09(2): strstr('Important: you ...', Array) #1 {main} thrown in /in/3fN09 on line 2
Process exited with code 255.

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