Source View: wp_get_attachment_thumb_url

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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
5021
5022      /**
5023       * Filter the attachment thumbnail URL.
5024       *
5025       * @since 2.1.0
5026       *
5027       * @param string $url     URL for the attachment thumbnail.
5028       * @param int    $post_id Attachment ID.
5029       */
5030      return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
5031 }
5032
5033 /**
5034  * Check if the attachment is an image.
5035  *
5036  * @since 2.1.0
5037  *
5038  * @param int $post_id Optional. Attachment ID. Default 0.
5039  * @return bool Whether the attachment is an image.