CODEWITHSUNDEEP
phpregexpreg-matchpreg-match-all
Linkjuice57
Linkjuice57

Reputation: 3771

preg_match inside a preg_match

I'm using the following preg_match to get the [title] tag of a webpage.

// get <title>
$search = "/\<title\>(.*)\<\/title>/i";
preg_match($search, $url_contents, $result);
$title = $result[1];

Now I want to search inside that [title] tag, so I wrote this:

// search for $keyword
$keyword_slash = "/". $keyword ."/";
preg_match_all($keyword_slash, $title, $result);
print_r($result); // just for testing

I've added $keyword_slash because else it gave me an error. Yet, this doesn't work. It always returns an empty array even though I know that $keyword is inside the [title].

Upvotes: 1

Views: 734

Answers (1)

anubhava
anubhava

Reputation: 785156

Your regex first preg_match doesn't seem to be right. It should be:

$search = "~<title>([^<]*)</title>~i";

However I must remind you that extracting title using regex like this is extremely error prone and you should consider using DOM parser to get that.

Update: Here is the suggested DOM parsing for title of a page:

$dom = new DOMDocument();
libxml_use_internal_errors(true);
$dom->loadHTML($content);
$xpath = new DOMXPath($dom);
$title = $xpath->query("//head/title")->item(0)->nodeValue;
printf("title=[%s]\n", $title);

Upvotes: 3

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