Using PHP to Replace URL in HTML

[AYcoo]

Using PHP I want to remove a whole \[code\]<iframe>\[/code\] element that contains the string \[code\]abc.com\[/code\]If I were to search the following for abc.com:\[code\]?iframe src="http://abc.com/abcd.html"??/iframe??iframe src="http://abc.com/lmno.html"??/iframe??iframe src="http://xyz.com/wxyz.html"??/iframe?\[/code\]I wish to be left with the following text after the first two elements are removed:\[code\]?iframe src="http://xyz.com/wxyz.html"??/iframe?\[/code\]