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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 |
|---|---|
| 1111 | * |
| 1112 | * @param string $html HTML img element or empty string on failure. |
| 1113 | * @param int $attachment_id Image attachment ID. |
| 1114 | * @param string|int[] $size Requested image size. Can be any registered image size name, or |
| 1115 | * an array of width and height values in pixels (in that order). |
| 1116 | * @param bool $icon Whether the image should be treated as an icon. |
| 1117 | * @param string[] $attr Array of attribute values for the image markup, keyed by attribute name. |
| 1118 | * See wp_get_attachment_image(). |
| 1119 | */ |
| 1120 | return apply_filters( 'wp_get_attachment_image', $html, $attachment_id, $size, $icon, $attr ); |
| 1121 | } |
| 1122 | |
| 1123 | /** |
| 1124 | * Gets the URL of an image attachment. |
| 1125 | * |
| 1126 | * @since 4.4.0 |
| 1127 | * |
| 1128 | * @param int $attachment_id Image attachment ID. |
| 1129 | * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array of |