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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 |
|---|---|
| 1086 | * |
| 1087 | * @since 2.8.0 |
| 1088 | * |
| 1089 | * @param string[] $attr Array of attribute values for the image markup, keyed by attribute name. |
| 1090 | * See wp_get_attachment_image(). |
| 1091 | * @param WP_Post $attachment Image attachment post. |
| 1092 | * @param string|int[] $size Requested image size. Can be any registered image size name, or |
| 1093 | * an array of width and height values in pixels (in that order). |
| 1094 | */ |
| 1095 | $attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment, $size ); |
| 1096 | |
| 1097 | $attr = array_map( 'esc_attr', $attr ); |
| 1098 | $html = rtrim( "<img $hwstring" ); |
| 1099 | |
| 1100 | foreach ( $attr as $name => $value ) { |
| 1101 | $html .= " $name=" . '"' . $value . '"'; |
| 1102 | } |
| 1103 | |
| 1104 | $html .= ' />'; |