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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 |
|---|---|
| 780 | if ( $permalink ) |
| 781 | $url = get_attachment_link($_post->ID); |
| 782 | |
| 783 | $post_title = attribute_escape($_post->post_title); |
| 784 | |
| 785 | $link_text = wp_get_attachment_image($id, $size, $icon); |
| 786 | if ( !$link_text ) |
| 787 | $link_text = $_post->post_title; |
| 788 | |
| 789 | return apply_filters( 'wp_get_attachment_link', "<a href='$url' title='$post_title'>$link_text</a>", $id, $size, $permalink, $icon ); |
| 790 | } |
| 791 | |
| 792 | /** |
| 793 | * Retrieve HTML content of attachment image with link. |
| 794 | * |
| 795 | * @since 2.0.0 |
| 796 | * @deprecated Use {@link wp_get_attachment_link()} |
| 797 | * @see wp_get_attachment_link() Use instead. |
| 798 | * |