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<?php $regex = '#[\-\d]$#'; $regex2 = '#[\\-\d]$#'; $regex3 = '#[\\\-\d]$#'; $value = '12-4'; preg_match($regex, $value, $matches); var_dump($matches); preg_match($regex2, $value, $matches); var_dump($matches); preg_match($regex3, $value, $matches); var_dump($matches);
Output for rfc.property-hooks, git.master, git.master_jit
array(1) { [0]=> string(1) "4" } array(1) { [0]=> string(1) "4" } Warning: preg_match(): Compilation failed: invalid range in character class at offset 6 in /in/HOedn on line 15 array(1) { [0]=> string(1) "4" }

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