You can’t, it’s as simple as that.
Why Not?
First of all, because the DIV is not part of your content. It’s either generated by WordPress’ filters, or the browser itself. So, you can’t do preg_replace on something that doesn’t exist.
Secondly, there’s a matter of cross-domain policy. It’s not possible to manipulate the content of an iframe unless the two webpages belong to the same domain. Anything else, and you will get a security error. This is intentional, and to prevent acts such as spoofing.
For further information, take a look at this link.
Related Posts:
- str_replace function in theme
- Shortcode to eliminate and replace with
- opening links in new tab using – add_filter( ‘the_content’, ‘make_clickable’);
- Default or Preset Content for Custom Post Types
- How would go about if I just want a temporary function?
- Adding HTML to the end of every post with the Block Editor
- Insert image in WordPress with HTML5 tag and caption function
- Add Element as a Filter to the_content
- login_headertitle is deprecated since version 5.2.0
- Insert Content Before div#main from the functions.php File
- Problem with images URL after filter applying
- Save_post – Warning: Cannot modify header information
- Remove External Links from WordPress posts Using add_filter() in Theme functions.php
- $content is empty while using DOMDocument
- How to make an If Else on Excerpt Filter
- child_of not working while searching
- Removing default image size list in Media Box
- How to restrict actions and filters “properly” by conditions
- How to customize search result page title?
- Removing Unnecessary Text from Admin Menu without CSS
- Display WordPress Search
- How to add a rel attribute to images that contains their categories?
- Preferred Use of home_url()?
- Custom function for user register in wp?
- Exclude Empty Child Categories in Menu
- Automatically insert php function into post $the_content
- add_filter priority problem
- Clean-up script tags
- Refactor create_function
- Super simple shortcode not working
- How to filter out shortcode when displaying the_excerpt() in the loop?
- Adding multiple taxonomy filters to functions.php
- Last updated date function
- is_customize_preview() like function to check if Customizer “Live Preview” in JavaScript
- How to set default archive image without overriding first attached image? [closed]
- How to customly read JWPlayer’s “Playlist” items by using its “playlistid”?
- Only let plugin add actions to wp_head & wp_footer on single posts
- Hard-coding custom menu elements for menu manager
- Twentyten Child Theme: header images display messed up in admin panel
- How to make custom column Admin>Users sortable?
- IF Statement on Button to make it complete and “uncomplete” based on user action / click
- Get Current Post ID in functions php, meta query filter
- Gravity Forms Button Text
- Find resources dynamically loading and change or add to the url
- Output and filter data from a XML url
- When sale price is 0.00 show only regular price
- What did I do wrong in my functions code, that will not change the “Get New Password” text to “Send It”?
- How to filter $content in shortcode function
- Move Custom Fields on General Settings Page to New Location
- Can’t properly set the_title add_filter to show short_URL
- How to retrieve the current post’s generated featured image size?
- Filter an WordPress Function in (general-template.php)
- Remove links from the_content when using filters wp_trim_excerpt
- Custom Behavior when Adding New Custom Post Type in Dashboard
- Why There Is No “get content by ID” Function
- Filter nav menu items HTML tags and wrap inner text with span
- Create custom function for hero image
- Randomizing wp_tag_cloud() in child theme
- Modify gform_other_choice_value for specific form and specific field in Gravity Forms
- Set “woocommerce_is_purchasable” to false for specific “$product->is_stock_status”
- How to append classname to body tag if guest user
- Where do I go to edit this area? [closed]
- How to add custom li item to wordpress menu
- Replace plugin function with a custom function?
- remove_action not working, even after changing priority [duplicate]
- remove/hide wp-editor
- Add a class to post if it has been recently updated
- search form leads to 404
- how to add_filter to non hook function
- Overwrite text in a complicated filter hook
- How to use WP conditional tag in a functions.php with OCEANWP Theme?
- custom error message for empty username and password using authenticate filter not working
- Modifying a WordPress Plugin
- CF7 select value get to function and reciept value from function
- Add #primary at the end of navlink permalinks on single posts
- How to add a custom class attribute into code wrapper? [duplicate]
- remove_filter function to unhook twentysixteen parent theme function
- only update titles of single posts
- OOP Switch statement with array as parameter
- How can I automatically delete comments that contain a URL?
- Appending „read more” to the excerpt conditionally
- How to add class dynamically from templates
- Woocommerce custom calculation function
- Remove all video attachment, both files and post/postmeta from database?
- ACF Filter return value
- Replace image attributes for lazyload plugin on image elements with specific class
- Regex works in regexr, but not if I filter content [closed]
- Retrieve a custom form field modified by a filter
- Function the_content
- functions.php / replacing div’s with new ones?
- How accomplish modification the_content if home/start page?
- Force resize for all video content
- Way of getting queried loop before the query with a filter hook?
- Post variables not displaying correctly in custom function
- Trying to get this function to show below the content
- Creating mixture of shortcodes to use in the visual/text editor
- How to crop image in WordPress with aspect ratio for any size of image
- How can I modify or filter this variable in an existing class? (Mai Theme)
- Customizer cuistom CSS Priority ordre Issue
- Copy and Modified WooCommerce function is_coupon_valid [closed]