wordpress - How to add image link as hyperlink to all images in content using preg_replace? -

i want change hyperlink of images post in content image link. can edit link using

function add_image_responsive_class($content) {    global $post;    $pattern ="~<a .*?>\s*<img(.*?)class=\"(.*?)\"(.*?)>\s*</a>~i";    $replacement = '<a href="$1"><img$1class="$2"$3></a>';    $content = preg_replace($pattern, $replacement, $content);    return $content; } add_filter('the_content', 'add_image_responsive_class'); 

but cant copy image link hyperlink.

for example:

now have this:

<a href="http://www.mywebsite.com/mypage"><img src="imagelink"></a> 

i want change to:

<a href="imagelink"><img src="imagelink"></a> 

okay, there few ways can this. i'll show 1 easy way, know can customize down finer granularity. process same, though.

basically we're going split string chunks , save each chunk putting set of parenthesis around it. can interchange chunks please.

let's take string , divide different parts.

<a href="http://www.mywebsite.com/mypage"><img src="imagelink"></a> |---1---||---------------2-------------||-----3----||---4---||--5-| 

really want here replace #2 #4. order be:

#1 #4 #3 #4 #5 

this pretty easy achieve preg_replace , here's how:

$link_text = '<a href="http://www.mywebsite.com/mypage"><img src="imagelink"></a>';  // add parenthesis around each item want capture $link_text = preg_replace('~(<a href=")(.*?)("><img src=")(.*?)("></a>)~i', '$1$4$3$4$5', $link_text);  print $link_text; 

that give following:

<a href="imagelink"><img src="imagelink"></a> 

that being said, can divide string wish ... doesn't have how did it. concept same. each set of parenthesis captures 1 item , gives number. can plug in number other part of string.

here working demo:

http://ideone.com/49nh6v