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    <p>For a one-time fix, you might consider an SQL solution. Some assumptions with the following SQL:</p> <ul> <li>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).</li> <li>The iframes to be replaced ALL are in the form:</li> </ul> <p><code>&lt;iframe src="https://w.soundcloud.com/player/?url="..." other-stuff&lt;/iframe&gt;</code></p> <ul> <li>All you care about is what's between the quotes for the url parameter</li> <li>The end result is [soundcloud url="..."]</li> </ul> <p>If all of this is true, then the following SQL should do the trick. It can be tweaked if you want a different shortcode, etc.</p> <p>Be sure to backup your wp_posts table before performing ANY mass update.</p> <pre><code>CREATE TABLE wp_posts_backup SELECT * FROM wp_posts ; </code></pre> <p>Once the backup is complete, the following SQL should fix all of your posts in a single shot:</p> <pre><code>UPDATE wp_posts p SET p.post_content = CONCAT( SUBSTRING_INDEX( p.post_content, '&lt;iframe src="https://w.soundcloud.com/player/?url=', 1 ) ,'[soundcloud url="' , REPLACE( REPLACE( SUBSTRING_INDEX( SUBSTR( p.post_content , LOCATE( '&lt;iframe src="https://w.soundcloud.com/player/?url=', p.post_content ) + 50 ) , '&amp;amp;', 1 ) , '%3A', ':' ), '%2F', '/' ) ,'?' ,SUBSTRING_INDEX( SUBSTR( p.post_content , LOCATE( '&lt;iframe src="https://w.soundcloud.com/player/?url=', p.post_content ) + 50 + LOCATE( '&amp;amp;', SUBSTR( p.post_content , LOCATE( '&lt;iframe src="https://w.soundcloud.com/player/?url=', p.post_content ) + 50 ) ) + 4 ) , ' ', 1 ) ,']' ,SUBSTR( p.post_content, LOCATE( '&lt;/iframe&gt;', p.post_content ) + 9 ) ) WHERE p.post_content LIKE '%&lt;iframe src="https://w.soundcloud.com/player/?url=%&lt;/iframe&gt;%' ; </code></pre> <p>I would suggest you TEST a few posts before running this against all of them. An easy way to test would be to add the following to the WHERE clause above (immediately before ';') changing '?' to the Post ID(s) to be tested.</p> <pre><code>AND p.ID IN (?,?,?) </code></pre> <p>If for any reason you need to restore your posts, you can do something like:</p> <pre><code>UPDATE wp_posts p JOIN wp_posts_backup b ON b.ID = p.ID SET p.post_content = b.post_content ; </code></pre> <p>One other thing to consider. I wasn't sure if you wanted to pass on the parameters that are currently a part of the url, so I included them. You can easily remove them by changing:</p> <pre><code> ,'?' ,SUBSTRING_INDEX( SUBSTR( p.post_content , LOCATE( '&lt;iframe src="https://w.soundcloud.com/player/?url=', p.post_content ) + 50 + LOCATE( '&amp;amp;', SUBSTR( p.post_content , LOCATE( '&lt;iframe src="https://w.soundcloud.com/player/?url=', p.post_content ) + 50 ) ) + 4 ) , ' ', 1 ) ,']' </code></pre> <p>to:</p> <pre><code> ,'"]' </code></pre> <p>resulting in:</p> <pre><code>UPDATE wp_posts p SET p.post_content = CONCAT( SUBSTRING_INDEX( p.post_content, '&lt;iframe src="https://w.soundcloud.com/player/?url=', 1 ) ,'[soundcloud url="' , REPLACE( REPLACE( SUBSTRING_INDEX( SUBSTR( p.post_content , LOCATE( '&lt;iframe src="https://w.soundcloud.com/player/?url=', p.post_content ) + 50 ) , '&amp;amp;', 1 ) , '%3A', ':' ), '%2F', '/' ) ,'"]' ,SUBSTR( p.post_content, LOCATE( '&lt;/iframe&gt;', p.post_content ) + 9 ) ) WHERE p.post_content LIKE '%&lt;iframe src="https://w.soundcloud.com/player/?url=%&lt;/iframe&gt;%' ; </code></pre> <p><strong>Updated to allow for no parameters in the url</strong></p> <pre><code>UPDATE wp_posts p SET p.post_content = CONCAT( SUBSTRING_INDEX( p.post_content, '&lt;iframe src="https://w.soundcloud.com/player/?url=', 1 ) ,'[soundcloud url="' , REPLACE( REPLACE( SUBSTRING_INDEX( SUBSTRING_INDEX( SUBSTR( p.post_content , LOCATE( '&lt;iframe src="https://w.soundcloud.com/player/?url=', p.post_content ) + 50 ) , '&amp;amp;', 1 ) , '"', 1 ) , '%3A', ':' ), '%2F', '/' ) ,'"]' ,SUBSTR( p.post_content, LOCATE( '&lt;/iframe&gt;', p.post_content ) + 9 ) ) WHERE p.post_content LIKE '%&lt;iframe src="https://w.soundcloud.com/player/?url=%&lt;/iframe&gt;%' ; </code></pre> <p>Good luck.</p>
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    1. COThis works great man. can you just let me know if we can be more specific. Currently after running the script i am getting `[soundcloud url="http://api.soundcloud.com/tracks/107374286?color=000000&auto_play=false&show_artwork=true"]` can't we make it `[soundcloud url="http://api.soundcloud.com/tracks/107374286"]` ?
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    2. COSure can. As I stated at the end of the answer, "One other thing to consider. I wasn't sure if you wanted to pass on the parameters that are currently a part of the url, so I included them. You can easily remove them by changing: ...". So, replace `,'?',SUBSTRING_INDEX ... ,']'` with `,'"]'` and you get a URL without the parameters.
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    3. COSee the last UPDATE statement in the updated answer.
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