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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 |
|---|---|
| 2022 | * Returning anything else than `true` will not add the attributes. |
| 2023 | * |
| 2024 | * @since 5.5.0 |
| 2025 | * |
| 2026 | * @param bool $value The filtered value, defaults to `true`. |
| 2027 | * @param string $image The HTML `img` tag where the attribute should be added. |
| 2028 | * @param string $context Additional context about how the function was called or where the img tag is. |
| 2029 | * @param int $attachment_id The image attachment ID. |
| 2030 | */ |
| 2031 | $add = apply_filters( 'wp_img_tag_add_width_and_height_attr', true, $image, $context, $attachment_id ); |
| 2032 | |
| 2033 | if ( true === $add ) { |
| 2034 | $image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 2035 | $size_array = wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id ); |
| 2036 | |
| 2037 | if ( $size_array ) { |
| 2038 | $hw = trim( image_hwstring( $size_array[0], $size_array[1] ) ); |
| 2039 | return str_replace( '<img', "<img {$hw}", $image ); |
| 2040 | } |