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<?php $s = ''; for($i=0;$i<1000;$i++) $s .= "abcdefgh"; var_dump(preg_match('/[-_.0-9A-Za-z]{1,64}@[-_0-9A-Za-z]+[-_.0-9A-Za-z]+/', $s));
Output for git.master, git.master_jit, rfc.property-hooks
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