Retrieve post id from any meta field

retrieve-id-of-post-from-any-meta.php

<?php
//From: https://github.com/oyina/Note-Taker/blob/master/note.php
//Retreives Post Id from Meta Key
function get_post_id_by_meta_key_and_value($key, $value) {
		global $wpdb;
		$meta = $wpdb->get_results("SELECT * FROM `".$wpdb->postmeta."` WHERE meta_key='".$wpdb->escape($key)."' 
                                AND meta_value='".$wpdb->escape($value)."'");
		if (is_array($meta) && !empty($meta) && isset($meta[0])) {
			$meta = $meta[0];
		}
		if (is_object($meta)) {
			return $meta->post_id;
		}
		else {
			return false;
		}
	}