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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 |
---|---|
2010 | * Returning anything else than `true` will not add the attributes. |
2011 | * |
2012 | * @since 5.5.0 |
2013 | * |
2014 | * @param bool $value The filtered value, defaults to `true`. |
2015 | * @param string $image The HTML `img` tag where the attribute should be added. |
2016 | * @param string $context Additional context about how the function was called or where the img tag is. |
2017 | * @param int $attachment_id The image attachment ID. |
2018 | */ |
2019 | $add = apply_filters( 'wp_img_tag_add_width_and_height_attr', true, $image, $context, $attachment_id ); |
2020 |
|
2021 | if ( true === $add ) { |
2022 | $image_meta = wp_get_attachment_metadata( $attachment_id ); |
2023 | $size_array = wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id ); |
2024 |
|
2025 | if ( $size_array ) { |
2026 | $hw = trim( image_hwstring( $size_array[0], $size_array[1] ) ); |
2027 | return str_replace( '<img', "<img {$hw}", $image ); |
2028 | } |