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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 |
---|---|
6915 | * Filters the mime type icon. |
6916 | * |
6917 | * @since 2.1.0 |
6918 | * |
6919 | * @param string $icon Path to the mime type icon. |
6920 | * @param string $mime Mime type. |
6921 | * @param int $post_id Attachment ID. Will equal 0 if the function passed |
6922 | * the mime type. |
6923 | */ |
6924 | return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id ); |
6925 | } |
6926 |
|
6927 | /** |
6928 | * Checks for changed slugs for published post objects and save the old slug. |
6929 | * |
6930 | * The function is used when a post object of any type is updated, |
6931 | * by comparing the current and previous post objects. |
6932 | * |
6933 | * If the slug was changed and not already part of the old slugs then it will be |