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<?php function is_regex($string) { return false !== @preg_match($string, 'anything'); } foreach (array('/foobar/', '/foobar/i', '`test{1,3}`', '/foo', '/foo(bar/') as $candidate) { var_dump(array($candidate, is_regex($candidate))); }
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(8) "/foobar/" [1]=> bool(true) } array(2) { [0]=> string(9) "/foobar/i" [1]=> bool(true) } array(2) { [0]=> string(11) "`test{1,3}`" [1]=> bool(true) } array(2) { [0]=> string(4) "/foo" [1]=> bool(false) } array(2) { [0]=> string(9) "/foo(bar/" [1]=> bool(false) }

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