如何使用mySql唯一ID /列名搜索记录？

Question

The following code works perfectly. It gives hotel url of the booking ID RRGPGM68

<?PHP
$con=mysqli_connect("localhost","username","pasword","dbName");
        // Check connection
        if (mysqli_connect_errno()) {
          die ("Failed to connect to MySQL: " . mysqli_connect_error());
        }
$booking_id_serch_text = RRGPGM68;
$searchroute = "select * from booking_tbl where booking_nmbr = '$booking_id_serch_text'";
$result = $con->query($searchroute);
$row = $result->fetch_assoc();
echo 'Hotel URL: '.$row['hotel_url'];
mysqli_close($con);
?>

But I want to assign the booking_id_serch_text dynamically from a text input field. So I altered the code as follows:

<form action="<?php echo get_permalink();?>" method="post">
    <input type="text" placeholder="Search..." required name="search_text">
    <input type="button" value="search" name="search">
</form>

<?PHP

if($_POST["search"]){
$serch_text = $_POST["search_text"]; 
$con=mysqli_connect("localhost","username","pasword","dbName");
        // Check connection
        if (mysqli_connect_errno()) {
          die ("Failed to connect to MySQL: " . mysqli_connect_error());
        }       
$booking_id_serch_text = $serch_text;
$searchroute = "select * from booking_tbl where booking_nmbr = '$booking_id_serch_text'";
$result = $con->query($searchroute);
$row = $result->fetch_assoc();
echo 'Hotel URL: '.$row['hotel_url'];
mysqli_close($con);
}

?>

But the above code just does nothing. How can I make it work? I'll add validation after this purpose is archived.

Answer 1

您必须在按下search使用提交按钮来发布表单

<input type="submit" value="search" name="search">

Answer 2

You are not submitting the form

<input type="button" value="search" name="search">

should be

<input type="submit" value="search" name="search">

Answer 3

<input type="button" /> buttons 

will not submit a form - they don't do anything by default. They're generally used in conjunction with JavaScript as part of an AJAX application.

<input type="submit"> buttons 

will submit the form they are in when the user clicks on them, unless you specify otherwise with JavaScript.

So use here