How to use php to find all images in text and assign new attributes to them?

Question

PHP

Actually, there is a publication (all in the database), which consists of text and pictures.
The task is to find images and assign them certain attributes.
How can this be implemented?

Answer 1

Retrieve a post from the database.
Create a DomDocument from it, recursively bypass childNodes, checking the node type, if it's an image, then setAttribute, render back to html. Save the document.
Theoretically, you can still try to fasten xpath, but I'm not very sure about referential integrity.

Answer 2

If the text is stored in HTML, then it's very simple
Use regular expressions.

$text = preg_replace('/<img(.*)(class="([a-z ]*)")([^>]*)>/isU', '<img \1 class="\3 myclass" \4>', $text);

Answer 3

Give this work to JS. Don't torture the poor server