页面加载“未找到结果”时不可见

Question

$search_code = $_POST['search_code'];
global $wpdb;
$helloworld_id = $wpdb->get_var("SELECT s_image FROM search_code WHERE s_code = $search_code");
 if (empty($helloworld_id)) { 
 echo '<div class="no_results">No results found</div>'; 
 }else 
 { ?>
  <img src="http://igtlaboratories.com/wp-content/uploads/images/<?php echo $helloworld_id; ?>"style="width:200px;height: auto;">
<?php
  }
}

I using this code but when page load by default "no result found" visible . how i disable on page load. Any help.

Thanks in advance

Answer 1

It simple, add Condition above the your search code and put your all code inside this condition. Please check below code

Used isset () in condition for Determine if a variable is set and is not NULL and !empty()

if(isset($_POST['search_code']) && !empty($_POST['search_code']))
{
    // Your code goes here 
    $search_code = $_POST['search_code'];
    global $wpdb;
    $helloworld_id = $wpdb->get_var("SELECT s_image FROM search_code WHERE s_code = $search_code");
    if (empty($helloworld_id)) { 
        echo '<div class="no_results">No results found</div>'; 
    }else { ?>
        <img src="http://igtlaboratories.com/wp-content/uploads/images/<?php echo $helloworld_id; ?>"style="width:200px;height: auto;">
    <?php }
}