Finds and exports attachments associated with an email address.
Parameters
$email_address
stringrequired- The attachment owner email address.
$page
intoptional- Attachment page number.
Default:
1
Source
*/
function attachment_url_to_postid( $url ) {
global $wpdb;
/**
* Filters the attachment ID to allow short-circuit the function.
*
* Allows plugins to short-circuit attachment ID lookups. Plugins making
* use of this function should return:
*
* - 0 (integer) to indicate the attachment is not found,
* - attachment ID (integer) to indicate the attachment ID found,
* - null to indicate WordPress should proceed with the lookup.
*
* Warning: The post ID may be null or zero, both of which cast to a
* boolean false. For information about casting to booleans see the
* PHP documentation.
* Use the === operator for testing the post ID when developing filters using
* this hook.
*
* @param int|null $post_id The result of the post ID lookup. Null to indicate
* no lookup has been attempted. Default null.
* @param string $url The URL being looked up.
*/
$post_id = apply_filters( 'pre_attachment_url_to_postid', null, $url );
if ( null !== $post_id ) {
return (int) $post_id;
}
$dir = wp_get_upload_dir();
$path = $url;
$site_url = parse_url( $dir['url'] );
$image_path = parse_url( $path );
// Force the protocols to match if needed.
if ( isset( $image_path['scheme'] ) && ( $image_path['scheme'] !== $site_url['scheme'] ) ) {
$path = str_replace( $image_path['scheme'], $site_url['scheme'], $path );
}
if ( str_starts_with( $path, $dir['baseurl'] . '/' ) ) {
$path = substr( $path, strlen( $dir['baseurl'] . '/' ) );
}
$sql = $wpdb->prepare(
"SELECT post_id, meta_value FROM $wpdb->postmeta WHERE meta_key = '_wp_attached_file' AND meta_value = %s",
$path
);
$results = $wpdb->get_results( $sql );
$post_id = null;
if ( $results ) {
// Use the first available result, but prefer a case-sensitive match, if exists.
$post_id = reset( $results )->post_id;
Changelog
Version | Description |
---|---|
4.9.6 | Introduced. |
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