is_local_attachment() WP 1.0

Check if the attachment URI is local one and is really an attachment.

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

No Hooks.

Return

true/false. True on success, false on failure.

Usage

is_local_attachment( $url );

$url(string) (required)

URL to check

Code of is local attachment: wp-includes/post.php ^{WP 5.2.1}

<?php
function is_local_attachment( $url ) {
	if ( strpos( $url, home_url() ) === false ) {
		return false;
	}
	if ( strpos( $url, home_url( '/?attachment_id=' ) ) !== false ) {
		return true;
	}
	if ( $id = url_to_postid( $url ) ) {
		$post = get_post( $id );
		if ( 'attachment' == $post->post_type ) {
			return true;
		}
	}
	return false;
}

Related Functions

From tag: Conditional tags (all)

More from category: Attachments (Media files)