[英]How to check variable exist in database wordpress using $wpdb
在Function.php中,我想檢查我的變量是否存在於wordpress數據庫的表中,但是它不起作用。
global $wpdb;
$count = $wpdb->get_var($wpdb->prepare("SELECT COUNT(*) FROM $wpdb->pincode_distro1 WHERE pincode = $the_order->shipping_postcode"));
if($count == 1) { echo 'distro 1'}
else { echo 'distro 2'}
我想你不需要$ wpdb-> prepare(),試試這種方式?
$count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->pincode_distro1 WHERE pincode = '$the_order->shipping_postcode'");
從表名中刪除$wpdb
。 代碼將起作用
從
$count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->pincode_distro1 WHERE pincode = '$the_order->shipping_postcode'");
至
$count = $wpdb->get_var("SELECT COUNT(*) FROM pincode_distro1 WHERE pincode = '$the_order->shipping_postcode'");
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