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<?php function is_intstr($val) { return preg_match("/^(0|[1-9][0-9]*)$/", $val); } foreach(range(0, 10) as $n) { echo $n; echo " - "; echo is_intstr("$n"); echo "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
0 - 1 1 - 1 2 - 1 3 - 1 4 - 1 5 - 1 6 - 1 7 - 1 8 - 1 9 - 1 10 - 1

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