preg_match find and replace a string pattern

preg_match find and replace a string pattern

I have a wordpress database which has some embeded iframes from sound cloud. I want the the iframes to be replaced with some sort of shortcode. I have even created a shortcode and it works pretty good.

The problem is that i have an old database with approx 2000 posts which has already embeded codes. What i want to do is to write a code so that it would replace the iframe with the shortcode.

Here is the code which i am using to find the url from the content but it always returns blank.

$string = 'Think Kavinsky meets Futurecop! meets your favorite 80s TV show theme song and you might be pretty close to Swedish producer Johan Bengtsson\'s retro project, Mitch Murder. Title track, "The Touch," is genuinely lighthearted and fun, crossing over from 80s synth work into a bit of French Touch influence; also including a big time guitar solo straight out of your dad\'s record collection. B-side "Race Day" could very easily be the soundtrack to a video montage of all of your favorite beach scenes from every 80s movie you\'ve ever watched, or as the PR put it, "quite possibly a contender to be the title screen music to a Wave Race 64 sequel." Sounds awesome to me. Also included in this package out today on Mad Decent\'s Jeffree\'s sub-label are two remixes of the A-side from Lifelike and Nite Sprite. Download below.  ';    preg_match("/url=(.*?)/", $string, $matches);    print_r($matches);  

The above code doesn't work and i am not so familiar with regex so if any one can figure out what is wrong here then it would be great. And also if anyone can guide me the right process to do this then that would be great.

Answer by lePunk for preg_match find and replace a string pattern

so basically you would like to match any characters (1+) after url= but not after the "

Answer by Ja?ck for preg_match find and replace a string pattern

Since you're working with HTML here, I would recommend using DOM functions:

$doc = new DOMDocument;  $doc->loadHTML($string);    foreach ($doc->getElementsByTagName('iframe') as $iframe) {      $url = $iframe->getAttribute('src');      // parse the query string      parse_str(parse_url($url, PHP_URL_QUERY), $args);      // save the modified attribute      $iframe->setAttribute('src', $args['url']);  }    echo $doc->saveHTML();  

This outputs the full document, so you would need to trim it down:

$body = $doc->getElementsByTagName('body')->item(0);  foreach ($body->childNodes as $node) {      echo $doc->saveHTML($node);  }  

Output:

Think Kavinsky meets Futurecop! meets your favorite 80s TV show theme song and you might be pretty close to Swedish producer Johan Bengtsson's retro project, Mitch Murder. Title track, "The Touch," is genuinely lighthearted and fun, crossing over from 80s synth work into a bit of French Touch influence; also including a big time guitar solo straight out of your dad's record collection. B-side "Race Day" could very easily be the soundtrack to a video montage of all of your favorite beach scenes from every 80s movie you've ever watched, or as the PR put it, "quite possibly a contender to be the title screen music to a Wave Race 64 sequel." Sounds awesome to me. Also included in this package out today on Mad Decent's Jeffree's sub-label are two remixes of the A-side from Lifelike and Nite Sprite. Download below.  
  

Answer by vollie for preg_match find and replace a string pattern

This should do for what you've specified

$new_string = preg_replace('/(?:]+src="[^\"]*url=([^\"]*soundcloud\.com[^\"]*))"[^\/]*\/[^\>]*>/i', '[soundcloud url="$1"]', $string);  

It's limited to iframes with the url=?soundcloud? part in the src attribute and replaces the entire iframe code with [soundcloud url="{part after url=}"]

Answer by gwc for preg_match find and replace a string pattern

For a one-time fix, you might consider an SQL solution. Some assumptions with the following SQL:

• There is only ONE iframe per post to be replaced (the SQL can be run multiple times if there are posts with more than one iframe).
• The iframes to be replaced ALL are in the form:

', p.post_content ) + 9 ) ) WHERE p.post_content LIKE '%', p.post_content ) + 9 ) ) WHERE p.post_content LIKE '%%' ;

Good luck.

Answer by Gillian Lo Wong for preg_match find and replace a string pattern

I'd suggest looking into simplehtmldom. It is a DOM parser that uses a selector similar to jQuery and CSS.

http://simplehtmldom.sourceforge.net/

$html = load($html_from_database);  // Find all frames  foreach($html->find('frame') as $element){     $source = $element->src; // extract the source from the frame.     // This is where you do your magic like changing links.      $element->href = $source ; // This is where you replace the old source  }      // UPDATE $html back into the table.  

Make sure you make a complete backup of all tables before you UPDATE any tables after parsing :)

http://simplehtmldom.sourceforge.net/manual.htm

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