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<?php preg_match("#[\w()-]#", 'some text'); // ok preg_match("#[-\w()]#", 'some text'); // ok preg_match("#[\w-()]#", 'some text'); // NOPE! preg_match("#[\w(-)]#", 'some text'); // ok
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Compilation failed: invalid range in character class at offset 3 in /in/dRG8U on line 5

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