WP get image ID

wp-get-image-id-snippet.php

<?php $image_id = jess_get_attachment_id_by_url( $image ); ?>

wp-get-image-id.php

////////////////////////////////////////////////////////////////////////
//	GET IMAGE ID	
////////////////////////////////////////////////////////////////////////

function jess_get_attachment_id_by_url( $url ) {
	$parsed_url  = explode( parse_url( WP_CONTENT_URL, PHP_URL_PATH ), $url );
	$this_host = str_ireplace( 'www.', '', parse_url( home_url(), PHP_URL_HOST ) );
	$file_host = str_ireplace( 'www.', '', parse_url( $url, PHP_URL_HOST ) );
	if ( ! isset( $parsed_url[1] ) || empty( $parsed_url[1] ) || ( $this_host != $file_host ) ) {
		return;
	}
	global $wpdb;
	$attachment = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->prefix}posts WHERE guid RLIKE %s;", $parsed_url[1] ) );
	return $attachment[0];
}


function prefix_remove_php_test( $tests ) {
	unset( $tests['direct']['WP_AUTO_UPDATE_CORE'] );
	return $tests;
}
add_filter( 'site_status_tests', 'prefix_remove_php_test' );