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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 |
---|---|
6765 | * Filters the mime type icon. |
6766 | * |
6767 | * @since 2.1.0 |
6768 | * |
6769 | * @param string $icon Path to the mime type icon. |
6770 | * @param string $mime Mime type. |
6771 | * @param int $post_id Attachment ID. Will equal 0 if the function passed |
6772 | * the mime type. |
6773 | */ |
6774 | return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); |
6775 | } |
6776 |
|
6777 | /** |
6778 | * Check for changed slugs for published post objects and save the old slug. |
6779 | * |
6780 | * The function is used when a post object of any type is updated, |
6781 | * by comparing the current and previous post objects. |
6782 | * |
6783 | * If the slug was changed and not already part of the old slugs then it will be |