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<?php function is_intstr($val, $negative=false) { return preg_match("/^".($negative?"-?":"")."(0|[1-9][0-9])*$/", $val); } foreach(range(0, 10) as $n) { print_r(is_intstr($n)); }
Output for git.master, git.master_jit, rfc.property-hooks
10000000001

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