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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 |
|---|---|
| 1094 | /** |
| 1095 | * Filters the list of custom logo image attributes. |
| 1096 | * |
| 1097 | * @since 5.5.0 |
| 1098 | * |
| 1099 | * @param array $custom_logo_attr Custom logo image attributes. |
| 1100 | * @param int $custom_logo_id Custom logo attachment ID. |
| 1101 | * @param int $blog_id ID of the blog to get the custom logo for. |
| 1102 | */ |
| 1103 | $custom_logo_attr = apply_filters( 'get_custom_logo_image_attributes', $custom_logo_attr, $custom_logo_id, $blog_id ); |
| 1104 | |
| 1105 | /* |
| 1106 | * If the alt attribute is not empty, there's no need to explicitly pass it |
| 1107 | * because wp_get_attachment_image() already adds the alt attribute. |
| 1108 | */ |
| 1109 | $image = wp_get_attachment_image( $custom_logo_id, 'full', false, $custom_logo_attr ); |
| 1110 | |
| 1111 | // Check that we have a proper HTML img element. |
| 1112 | if ( $image ) { |