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<?php $searchTerm = "abcd"; $replaceTerm = "XXXX"; $test=array("$searchTerm/$searchTerm_.mp3", "$searchTerm", "xay$searchTerm", "asdasd/$searchTerm.mp3", "$searchTerm.", "blahahbasd$searchTerm"); foreach ($test as $t) echo "$t => " . preg_replace("/(". preg_quote($searchTerm) . "([^_.])|". preg_quote($searchTerm) . "$)/x", preg_quote($replaceTerm) . "\${2}", $t) . "\n";
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $searchTerm_ in /in/fR8oX on line 5 abcd/.mp3 => XXXX/.mp3 abcd => XXXX xayabcd => xayXXXX asdasd/abcd.mp3 => asdasd/abcd.mp3 abcd. => abcd. blahahbasdabcd => blahahbasdXXXX

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