preg_match（）检查没有[img] BB标签的图片网址，并使用PHP返回布尔值

Question

In my text field I have images enclosed within [img] BB tags like

[img]http://i58.tinypic.com/i3yxar.jpg[/img]

and plain image URLs like

http://www.jonco48.com/blog/tongue1.jpg

I want preg_match to look for plain image urls and if found return 1 otherwise 0, How to do this???

Thanks

Answer 1

With regex is quite difficult to look for a pattern without a piece, in this case the img open and closure tag.

So I would search the urls within the tag, then search all the urls and compare these counts

$text = "";

$tagPattern = "/\[img\].+?\[\/img\]/";
preg_match_all($pattern, $text, $tagMatches);

$urlInTagCount = count($tagMatches[0]);

$plainPattern = "~https?://\S+\.(?:jpe?g|gif|png)(?:\?\S*)?(?=\s|$|\pP)~i";
preg_match_all($pattern, $text, $plainMatches);

$allUrlCount = count($plainMatches[0]);

return $allUrlCount > $urlInTagCount;