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<?php var_dump(ctype_digit('123')); var_dump(ctype_digit(123)); var_dump(ctype_digit('123.45'));
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) Deprecated: ctype_digit(): Argument of type int will be interpreted as string in the future in /in/0e5Gq on line 3 bool(false) bool(false)

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