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PHP頁面不顯示數據表

[英]PHP Page Does not Display Data Table

我有一個搜索框,在表格中顯示搜索結果。 搜索框使用簡單的搜索查詢從數據庫中獲取數據。

以下是搜索框的代碼

 <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

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');
?>

當我運行代碼時,顯示的頁面為空。

查看以下內容:

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

應該:

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

您需要逃脫它。 現在的方式是您對SQL注入持開放態度

$searchword = $_POST['seacher']; 

所以像下面這樣。 另請注意錯誤: $_POST中的seacher / searcher

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

在表名和列名前后加上(``)反引號,以防止出現“ MySQL保留字錯誤”

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

刪除第一個訪存,因為它會干擾另一個

$rows = $result->fetch_assoc();  

只要把那個放在桌子前

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

注意表中的錯誤

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

為您

if($result->num_rows > 0){

您可以添加以下內容:

} else {
  echo 'Nothing found'; 
}

在您的HTML中,Input必須具有您要發布的名稱。

<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>

並在您的PHP中確保您正在發布;

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

並嘗試這樣;

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

要么

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

// 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
?>

因為稍后您在這里運行循環

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

抱歉,老兄,但是這里有幾個問題

首先修復您的表單:method =“ post”-不是方法; type =“ text”-不​​是type =“ search”; </ form>-不是</ 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>

其次改變:

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

第三,處理查詢中的任何錯誤:

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

第四,刪除此行:

$rows = $result->fetch_assoc();

最后,僅出於我的理智,請刪除此行(您確實不需要):

if($result->num_rows > 0){

和它匹配:

}

而且甚至在SQL注入的情況下也不要讓我開始轉義用戶輸入!

祝你好運,我希望你能成功

您在代碼中兩次使用$result->fetch_assoc()這行,因此您的查詢只有1個結果,然后第一個陳述出現1個結果,然后當您嘗試第二次在表的html之前使用時,您什么也沒得到。

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