php - 表单提交未将数据输入数据库

Question

<form action="<?php $_SERVER['PHP_SELF'] ?>" method="POST">
    <input type="text" name="duration" placeholder="Enter duration">
    <input type="text" name="budget" placeholder="Enter Budget">
    <input type="text" name="keyskills" placeholder="Enter Skills">
    <input type="text" name="jobdescription" placeholder="Enter Job Description">
    <input type="text" name="edate" placeholder="Click to enter expiry date">
    <input type="text" name="cdexmin" placeholder="Enter Minimum Experience">
    <input type="text" name="cdexmax" placeholder="Enter Maximum Experience">
    <input type="submit"> 
</form>

<?php
if(isset($_POST['submit'])) {
    try {
        // Establish server connection and select database
        $username = $_SESSION['username'];
        $stmt = $db->prepare("SELECT * FROM employer INNER JOIN company ON employer.cid = company.cid WHERE employer.username='$username' ");
        $stmt->execute();
        $row = $stmt->fetch(PDO::FETCH_ASSOC);
$cid=$row['cid'];
        $eid = $row['eid'];
        $duration = $_POST['duration'];
        $budget = $_POST['budget'];
        $keyskills = $_POST['keyskills'];
        $jobdescription = $_POST['jobdescription'];
        $edate = $_POST['edate'];
        $cdexmin = $_POST['cdexmin'];
        $cdexmax = $_POST['cdexmax'];
        $stmt = $db->prepare("INSERT INTO job(cid,eid,duration,budget,keyskills,jdesc,edate,cdexmin,cdexmax) values('$cid','$eid','$duration','$budget','$keyskills','$jobdescription','$edate','$cdexmin','$cdexmax') ");
        $stmt->execute();
        echo "JOB POSTED SUCCESSFULLY";
    } catch(PDOException $e) {
        echo "Error occurs:". $e->getMessage();
    }   
}
?>

这是我刚刚为尝试将值插入数据库的示例表单创建的代码。我的问题是这些值没有进入数据库。

为什么不工作？是否存在我找不到的语法错误？

页面解析很容易完成，没有显示任何错误，但值没有进入数据库。

Answer 1

您正在使用$_POST['submit']，但没有任何使用此名称的输入。

将名称添加到您的输入类型提交中，如下所示

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