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I want to add a CSS class "myimg" to every image both inside and outside of a post. What is the best way to approach this?

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function add_image_class($class){
    $class .= ' additional-class';
    return $class;
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Try to use this j query function like this in header file

$(document).ready(function() {
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is there a way to do this via PHP or a WP function rather than JS? – manc Aug 3 '13 at 9:59
The better way is not php or wordpress for all images. – Bindiya Patoliya Aug 3 '13 at 10:04

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