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<?php var_dump( array_filter( array( '1', 2, -3, '-4', 'a', 'zero' ), \is_numeric ) );
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant "is_numeric" in /in/Lamsv:2 Stack trace: #0 {main} thrown in /in/Lamsv on line 2
Process exited with code 255.

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