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<?php var_dump( filter_var( 'http://www.youtube.com', FILTER_VALIDATE_URL ), filter_var( 'tp://www.youtube.com', FILTER_VALIDATE_URL ), filter_var( 'youtube.com', FILTER_VALIDATE_URL ));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant " FILTER_VALIDATE_URL" in /in/p5nS3:5 Stack trace: #0 {main} thrown in /in/p5nS3 on line 5
Process exited with code 255.

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