PHP页面不显示数据表

Question

I have a search box that displays the search results in a table. The search box uses a simple search query to get the data from a database.

below is the code for the search box

 <form id="search-form" mmethod="post" action="search.php">
  <input name="searcher" id="search-bar" type="search" placeholder="Type to Search">
  <input id="search-button" type="submit" value="Find">
</form

The PHP:

$host="localhost"; // Host name 
$username="root"; // Mysql username 
$password=""; // Mysql password 
$db_name="datacentre"; // Database name 
$tbl_name="data_centre_users"; // Table name 
$server_name="localhost";


if(isset($_POST['submit'])) {
  $searchword = $_POST['seacher'];  

// Create connection
$con = new mysqli($server_name, $username, $password, $db_name , 3306);

if ($con->connect_error) {
    die("Connection failed: " . $con->connect_error);
}  

// Retrieve data from database 
$sql="SELECT * FROM $tbl_name WHERE first_name='$searchword' OR last_name='$searchword' ";
$result = $con->query($sql);

$rows = $result->fetch_assoc();          

?>
<section id="sidebar">

</section>

<section id="content">

<div id="scroll-table">
<table >
<caption>
           Search Results
            </caption>
            <tr>
                <th class="center"><strong>ID</strong></th>
                <th class="center"><strong>FirstName</strong></th>
                <th class="center"><strong>Lastname</strong></th>
                <th class="center"><strong>Request</strong></th>
                <th class="center"><strong>Purpose</strong></th>
                <th class="center"><strong>Description</strong></th>
                <th class="center"><strong>Booking Time</strong></th>
                <th class="center"><strong>Access Time</strong></th>
                <th class="center"><strong>Exit Time</strong></th>
                <th class="center"><strong>Approved</strong></th>
                <th class="center"><strong>Approved By</strong></th>
                <th class="center"><strong>Update</strong></th>
            </tr>
            <?php
            if($result->num_rows > 0){
                // output data of each row
                while($rows = $result->fetch_assoc()){ ?>
                    <tr>
                        <td class="center"><?php echo $rows['id']; ?></td>
                        <td class="center"><?php echo $rows['fisrt_name']; ?></td>
                        <td class="center"><?php echo $rows['last_name']; ?></td>
                        <td class="center"><?php echo $rows['request']; ?></td>
                        <td class="center"><?php echo $rows['purpose']; ?></td>
                        <td class="center"><?php echo $rows['description']; ?></td>
                        <td class="center"><?php echo $rows['booking_time']; ?></td>
                        <td class="center"><?php echo $rows['access_time']; ?></td>
                        <td class="center"><?php echo $rows['exit_time']; ?></td>
                        <td class="center"><?php echo $rows['approved']; ?></td>
                        <td class="center"><?php echo $rows['approved_by']; ?></td>
                        <td class="center" ><a href="update.php?id=<?php echo $rows['id']; ?>">update</a></td>
                    </tr>

                    <?php
                }
            }       
      ?> 
</table>
</div>
</section>
<

<aside></aside>

<?php
$con->close();
}
include('footer.php');
?>

When I run the code the page displayed is empty.

Answer 1

Check out the following:

<form id="search-form" mmethod="post" action="search.php">

Should be:

<form id="search-form" method="post" action="search.php">

You need to escape it. The way it is now you are wide open to SQL-injection

$searchword = $_POST['seacher']; 

So something like below. Also note the error : seacher / searcher in the $_POST

  $searchword = $con->real_escape_string( $_POST['searcher'] ); 

Put (``) backticks around table and column names to prevent "mysql reserved word error"

// Retrieve data from database 
$sql="SELECT * FROM `$tbl_name` WHERE `first_name` = '$searchword' OR `last_name` = '$searchword' "; 

Remove the first fetch because it will interfere with the other

$rows = $result->fetch_assoc();  

Just keep the one just before your table

while($rows = $result->fetch_assoc()){

Note the error in your table

<td class="center"><?php echo $rows['first_name']; ?></td> <!-- ['fisrt_name'] -->

For your

if($result->num_rows > 0){

You could add the following:

} else {
  echo 'Nothing found'; 
}

Answer 2

In you HTML, Input must has a name that you are trying to post.

<form id="search-form" method="post" action="search.php"> //spelling correction as you have type mistake mmethod
  <input name="searcher" id="search-bar" type="text" placeholder="Type to Search">
  <input id="search-button" type="submit" name="submit" value="Find">
</form>

and in your PHP make sure you are posting;

if(isset($_POST['submit']) && $_POST['submit']=="Find"){

AND try like this;

$sql="SELECT * FROM '$tbl_name' WHERE first_name='$searchword' OR last_name='$searchword' ";

OR

$sql="SELECT * FROM $tbl_name WHERE first_name='$searchword' OR last_name='$searchword' ";

AND

// Retrieve data from database 
$sql="SELECT * FROM $tbl_name WHERE first_name='$searchword' OR last_name='$searchword' ";
$result = $con->query($sql);

$rows = $result->fetch_assoc();   //Remove this you don't need it
?>

Because later you are running a loop here

<?php
if($result->num_rows > 0){
// output data of each row
while($rows = $result->fetch_assoc()){ ?>

Answer 3

sorry dude, but there are a couple of issues here

firstly fix your form: method="post" - not mmethod; type="text" - not type="search"; </form> - not </form

<form id="search-form" method="post" action="search.php">
  <input name="searcher" id="search-bar" type="text" placeholder="Type to Search">
  <input id="search-button" type="submit" value="Find">
</form>

secondly change:

if (isset($_POST['searcher'])) { // changed from submit

thirdly handle any errors in your query:

if (($result = $con->query($sql)) === false) {
  die("error: ".$con->error); // todo: improve error handling
}

fourthly remove this line:

$rows = $result->fetch_assoc();

finally, for my sanity only, please remove this line (you really don't need it):

if($result->num_rows > 0){

and it's matching:

}

and don't even get me started on escaping user input in case of SQL injection!

good luck, I hope you get this running

Answer 4

您在代码中两次使用$result->fetch_assoc()这行，因此您的查询只有1个结果，然后第一个陈述出现1个结果，然后当您尝试第二次在表的html之前使用时，您什么也没得到。