Question

<html><head>
<script>
function submit() {
   document.getElementById("myform").submit();
}
</script>
</head>
        <body>
<form id="myform" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
    <h1> AWB_NO</h1>
    <input type=text name="excel" onchange="submit()" >
    </br>
    </form>
        <?php
session_start();
$vars = $_COOKIE['var1'];
//$vars=$_GET['doc'];
if(!isset($_SESSION['items'])) {
    $_SESSION['items'] = array();
}

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

    $host="localhost";
    $user="root";
    $password="";
    $db="greenmobiles";
    $table="manifest";
    $var=$_POST['excel'];
    //$vars=$_POST['doc'];    
    mysql_connect("$host","$user","$password") or die("Cannot Connect");
    mysql_select_db("$db") or die("Cannot select DB!");    
    /*$sqlcommand="SELECT document_no FROM manifest WHERE (document_no = '$vars')";
    $doc_res = mysql_query($sqlcommand);
   while($col = mysql_fetch_array($doc_res)){
   if($col['document_no']==$vars)
    {
        echo "Document number is correct</br>";
        break;
    }}
    if($col['document_no']!==$vars)
    {
        echo "Please check the document no entered";
        exit(0);

    }*/
      if (in_array($var,$_SESSION['items']))
    {
        echo "<script>alert('oops! This item has already been scanned!')</script>";
}
else
{
    $sql = "SELECT * FROM manifest WHERE (awb_no = '$var')";
$result = mysql_query($sql);  
if(mysql_num_rows($result) > 0) {
    echo "tracking id present in the manifest</br>";
} 
else {
    echo "<script>alert('Tracking id is not present in the manifest!')</script>";

}
 $sqli = "SELECT * FROM manifest WHERE (awb_no = '$var') AND (document_no='$vars')";
$result1 = mysql_query($sqli);  
if (mysql_num_rows($result1)) 
{
   echo "The tracking id matches with the document no.";
    # code...
}
else
{
echo "<script>alert('Tracking id does not belong to the document number entered.')</script>";
exit(0);
} 

       while ($row = mysql_fetch_array($result)) {

        $_SESSION['data'][] = $row['awb_no'];
        $_SESSION['items'] = $_SESSION['data'];
   }
     echo"The new value has been scanned!</br>";
  echo "<hr>";
  echo "The tracking id's of the currently scanned items are given below<br><hr>";
  foreach ($_SESSION['items'] as $x => $value)
   {
    echo "$value";
    echo "<br>";
        # code...
   }

  }
}
else
{
    session_destroy();
}
?>
</body>
    </html>

喂！我是javascript，php和html的新手。在这里，当我尝试使用javascript提交而不是提交按钮时，我的php脚本似乎没有执行。如何解决这个问题？请帮忙！ P.S我不想使用提交按钮。

Answer 1

您的脚本有很多错误。激活你的php错误显示：

ini_set('error_reporting', E_ALL);
ini_set('display_errors', true);

首先，必须先启动会话才能发送标头。所以用以下文件开始文件：

<?php
session_start();
?>
<html>
...

其次，全局$ _POST包含一个带有＆＃39; name＆＃39;的数组。属性

<input type=text name="excel" onchange="submit()" >
<?php
if(isset($_POST['excel'])) { ... }

Answer 2

if(isset($_POST['submit'])) is wrong type `if(isset($_POST['name']))`

Javascript提交功能不起作用。

2 个答案: