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<?php $str = 'else if($rule==\'somerule1\') echo \'{"s":1,"n":"name surname"}\'; else if($rule==\'somerule2\') echo \'{"s":1,"n":"another text here"}\';'; $rule = "somerule1"; $pattern = "/else if\(\\\$rule=='$rule'\)\necho '{\"s\":\d+,\"n\":\"[^\"]*\"}';/"; $str = preg_replace($pattern, "", $str); echo $str;

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