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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2251 | * Returning anything else than `true` will not add the attributes. |
| 2252 | * |
| 2253 | * @since 5.5.0 |
| 2254 | * |
| 2255 | * @param bool $value The filtered value, defaults to `true`. |
| 2256 | * @param string $image The HTML `img` tag where the attribute should be added. |
| 2257 | * @param string $context Additional context about how the function was called or where the img tag is. |
| 2258 | * @param int $attachment_id The image attachment ID. |
| 2259 | */ |
| 2260 | $add = apply_filters( 'wp_img_tag_add_width_and_height_attr', true, $image, $context, $attachment_id ); |
| 2261 | |
| 2262 | if ( true === $add ) { |
| 2263 | $image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 2264 | $size_array = wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id ); |
| 2265 | |
| 2266 | if ( $size_array && $size_array[0] && $size_array[1] ) { |
| 2267 | // If the width is enforced through style (e.g. in an inline image), calculate the dimension attributes. |
| 2268 | $style_width = preg_match( '/style="width:\s*(\d+)px;"/', $image, $match_width ) ? (int) $match_width[1] : 0; |
| 2269 | if ( $style_width ) { |