Source View: wp_mime_type_icon

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
5257       * Filter the mime type icon.
5258       *
5259       * @since 2.1.0
5260       *
5261       * @param string $icon    Path to the mime type icon.
5262       * @param string $mime    Mime type.
5263       * @param int    $post_id Attachment ID. Will equal 0 if the function passed
5264       *                        the mime type.
5265       */
5266      return apply_filters( 'wp_mime_type_icon', $icon, $mime, $post_id );
5267 }
5268
5269 /**
5270  * Check for changed slugs for published post objects and save the old slug.
5271  *
5272  * The function is used when a post object of any type is updated,
5273  * by comparing the current and previous post objects.
5274  *
5275  * If the slug was changed and not already part of the old slugs then it will be