Delete Width And Height Attributes From Image Tag

The following snippet will let you delete both width and height attributes from image tag.

<?php
$image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'thumbnail' );
if ($image) : ?>
    <img src="<?php echo $image[0]; ?>" alt="" />
<?php endif; ?>

<?php

$image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'thumbnail' );

if ($image) : ?>

<?php endif; ?>

Snippet Source/Credit: Stackexchange

Delete Width And Height Attributes From Image Tag

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