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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.

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
2003           }
2004      } else {
2005           $constraint = '';
2006      }
2007
2008      $post_title = esc_attr($post->post_title);
2009
2010      $icon = "<img src='$src' title='$post_title' alt='$post_title' $constraint/>";
2011
2012      return apply_filters( 'attachment_icon', $icon, $post->ID );
2013 }
2014
2015 /**
2016  * Retrieve HTML content of image element.
2017  *
2018  * @since 2.0.0
2019  * @deprecated 2.5.0
2020  * @deprecated Use wp_get_attachment_image()
2021  * @see wp_get_attachment_image()