apply_filters( 'get_image_tag_class', string $class, int $id, string $align, string|int[] $size )

Filters the value of the attachment’s image tag class attribute.


$class string
CSS class name or space-separated list of classes.
$id int
Attachment ID.
$align string
Part of the class name for aligning the image.
$size string|int[]
Requested image size. Can be any registered image size name, or an array of width and height values in pixels (in that order).

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File: wp-includes/media.php. View all references

$class = apply_filters( 'get_image_tag_class', $class, $id, $align, $size );

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Version Description
2.6.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    Contributed by Emil

    To add the .img-fluid class, for responsive images in Bootstrap 4:

    function example_add_img_class( $class ) {
    	return $class . ' img-fluid';
    add_filter( 'get_image_tag_class', 'example_add_img_class' );

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