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Replace/remove if starts with


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Im trying to modify the following expression:


$str = preg_replace('~^\s*\?>~', '', $str);


Currently it replaces ?> if its proceeded by whitespace, however I also want it to replace the ?> if its not proceed by <?(php)? before the ?>, I've tried the following:


$str = preg_replace( '~^(?<!<\?)\s*\?>~', '', $str);


But that did'nt seem to work.

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