我一直在尝试调试这个脚本一个月。程序的其余部分已经构建完毕,这一件事情无法正常工作。问题是$ query变量,它返回null,除非我硬编码 - 这对于搜索表单是不可能的。我已经尝试添加'\ n',我已经尝试过放入返回,我已经将“改为”改为开头。我已经测试了这个块之外的其余代码了,一切正常。我在这个块上运行测试,你可以从下面注释掉的echo语句中看到。那些都测试正常。函数构建的$ query字符串在硬编码时或在数据库浏览器中返回正确的数据。我被卡住了!请帮助。
[code snippet]
if(isset($_POST['submit'])) {
// define the list of fields
$fields = array('lastname', 'firstname', 'dob', 'city', 'telephone', 'email', 'user_id');
$conditions = array();
// loop through the defined fields
foreach($fields as $field){
//echo "Field is ".$field."\n";
// if the field is set and not empty
if(isset($_POST[$field]) && $_POST[$field] != '') {
//echo "Field is: ".$field."\n".$field." is: ".$_POST[$field]."\n";
// create a new condition while escaping the value inputed by the user (SQL Injection)
$conditions[] = "$field LIKE '%" . mysql_real_escape_string($_POST[$field]) . "%'
";
}
}
// builds the query
$query = "\"
SELECT *
FROM wp_ct_ad_client_db_table
";
// if there are conditions defined
$query_user_id = "user_id = ".$user_id."
\"";
array_push($conditions, $query_user_id);
if(count($conditions) > 0) {
// append the conditions
$query .= "WHERE " . implode(' AND ', $conditions); // you can change to 'OR', but I suggest to apply the filters cumulative
}
echo "Query String: ".$query."\n";
//$result = $wpdb->get_results($query);
$my_query = $query;
echo "Test My Query Logic \n";
//$result = $wpdb->get_results("SELECT * FROM wp_ct_ad_client_db_table WHERE lastname LIKE '%A%' AND user_id = $user_id;");
//$result = $wpdb->get_results($my_query);
$result = $wpdb->get_results($my_query, A_ARRAY);
var_dump($result);
[/ code snippet]