wp-includes/post-template.php:1652Retrieves an attachment page link using an image or icon, if possible.
$postint|WP_Postoptional0$sizestring|int[]optional'thumbnail'$permalinkbooloptionalfalse$iconbooloptionalfalse$textstring|falseoptionalfalse$attrarray|stringoptional''string2 hooks fire while wp_get_attachment_link() runs, in this order:
Filters the list of attachment link attributes.
Filters a retrieved attachment page link.
function wp_get_attachment_link( $post = 0, $size = 'thumbnail', $permalink = false, $icon = false, $text = false, $attr = '' ) { $_post = get_post( $post ); if ( empty( $_post ) || ( 'attachment' !== $_post->post_type ) || ! wp_get_attachment_url( $_post->ID ) ) { return __( 'Missing Attachment' ); } $url = wp_get_attachment_url( $_post->ID ); if ( $permalink ) { $url = get_attachment_link( $_post->ID ); } if ( $text ) { $link_text = $text; } elseif ( $size && 'none' !== $size ) { $link_text = wp_get_attachment_image( $_post->ID, $size, $icon, $attr ); } else { $link_text = ''; } if ( '' === trim( $link_text ) ) { $link_text = $_post->post_title; } if ( '' === trim( $link_text ) ) { $link_text = esc_html( pathinfo( get_attached_file( $_post->ID ), PATHINFO_FILENAME ) ); } /** * Filters the list of attachment link attributes. * * @since 6.2.0 * * @param array $attributes An array of attributes for the link markup, * keyed on the attribute name. * @param int $id Post ID. */ $attributes = apply_filters( 'wp_get_attachment_link_attributes', array( 'href' => $url ), $_post->ID ); $link_attributes = ''; foreach ( $attributes as $name => $value ) { $value = 'href' === $name ? esc_url( $value ) : esc_attr( $value ); $link_attributes .= ' ' . esc_attr( $name ) . "='" . $value . "'"; } $link_html = "<a$link_attributes>$link_text</a>"; /** * Filters a retrieved attachment page link. * * @since 2.7.0 * @since 5.1.0 Added the `$attr` parameter. * * @param string $link_html The page link HTML output. * @param int|WP_Post $post Post ID or object. Can be 0 for the current global post. * @param string|int[] $size Requested image size. Can be any registered image size name, or * an array of width and height values in pixels (in that order). * @param bool $permalink Whether to add permalink to image. Default false. * @param bool $icon Whether to include an icon. * @param string|false $text If string, will be link text. * @param array|string $attr Array or string of attributes. */ return apply_filters( 'wp_get_attachment_link', $link_html, $post, $size, $permalink, $icon, $text, $attr );}Introduced in 2.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/post-template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.