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run code in 150+ php & hhvm versions
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<?php $txt ='<!-- [newsletter:123123] --> <html style="font-size:14px;font:inherit;vertical-align:baseline;font-family:'Open Sans',sans-serif;height:100%;"> <head><meta http-eq'; preg_match('\[newsletter:(\d*?)\]', $txt, $matches); var_dump($matches);
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected 'Open' (T_STRING) in /in/YpZYm on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_STRING in /in/YpZYm on line 3
Process exited with code 255.