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<?php $rx = "^.+(?:@\..+)? $"; $ip = '8.8.8.8'; $mary = 'mary@'.$ip; $g = 'google.com:80/test?abc=123#a1'; $c = 'john:smith@8.8.8.8:80/test?abc=123#a1'; preg_match("/$rx/",$ip,$matches); echo $matches[0],"\n"; preg_match("/$rx/",$mary,$matches); echo $matches[0],"\n"; preg_match("/$rx/",$g,$matches); echo $matches[0],"\n"; preg_match("/$rx/",$c,$matches); echo $matches[0];
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key 0 in /in/XnSHP on line 10 Warning: Undefined array key 0 in /in/XnSHP on line 14 Warning: Undefined array key 0 in /in/XnSHP on line 18 Warning: Undefined array key 0 in /in/XnSHP on line 21

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