Question

我使用php创建了注册表单。我有index.php，submit.php，functions.php和script。

现在它工作正常，我需要从数据库中检索数据并在前端显示。

我是php新手，我正在学习。请帮我这样做。

这是我的data.php：

    <?php 
    include ('condb.php');
    $query = mysql_query("select * from test where id='".$_GET['id']."'");
    $row = mysql_fetch_array($query);
?>
    <body>
        <h3>Employee Detail</h3>
        <p>Emp Name:</p> <?php echo $row['fname'];?>
        <p>LastName:</p> <?php echo $row['lname'];?>
    </body>
<?php ?>

这是action.php：

           <?php
include('condb.php');

extract($_POST);
$que=mysql_query("INSERT INTO test (id, fname, lname) VALUES ('$id', '$fname', '$lname')") or die("Error Msg!");
if($que)
{
    header('Location: data.php?id='.$id.'');
}

?>

的index.html：

<body bgcolor="#2E2E2E">
        <table align="center" cellpadding="5" style="background:#A4A4A4; border-radius:4px; margin-top:40px; padding:15px;">
            <h1 style="text-align:center; color:white; margin-top:50px">Employee Registration Form</h1>
            <form method="post" action="action.php">
                <tr><td>First Name:</td><td> <input type="text" id="fname" name="fname" required /></td></tr>
                <tr><td>Last Name:</td><td> <input type="text" id="lname" name="lname"/></td></tr>
                <tr><td></td><td><input type="submit" value="Register Me!"/></td></tr>
            </form>
        </table>
    </body>

和condb.php：

<?php 
$con=mysql_connect("localhost","root","")or die("Error!");
mysql_select_db("test") or die(mysql_error());
?>

Answer 1

这里我显示了3字段的代码，您可以对其他字段执行类似的操作。您可以使用 newfile 并粘贴该代码。

<?php
    $dbhost = 'localhost';
    $dbuser = 'root';
    $dbpass = '';
    $conn = mysql_connect($dbhost, $dbuser, $dbpass);
    if(! $conn )
    {
      die('Could not connect: ' . mysql_error());
    }
    $sql = 'SELECT fname, lname, email FROM crop';

    mysql_select_db('crop');
    $retval = mysql_query( $sql, $conn );
    if(! $retval )
    {
      die('Could not get data: ' . mysql_error());
    }
    while($row = mysql_fetch_array($retval, MYSQL_ASSOC))
    {
        echo "First Name :{$row['fname']}  <br> ".
             "Last Name : {$row['lname']} <br> ".
             "Email Address : {$row['email']} <br> ".
             "--------------------------------<br>";
    } 
    echo "Fetched data successfully\n";
    mysql_close($conn);
    ?>

Answer 2

您必须使用select语句从数据库中检索数据。从数据库中选择数据后，您必须获取数据以使其有用。

例如：

$queryResult = mysql_query("SELECT * FROM crop");
$result = mysql_fetch_assoc($queryResult);

当您打算打印结果时，您将看到数据库中的所有选定数据

print_r($result);

Answer 3

 <?php
       include 'config.php';
        error_reporting(E_ERROR);
        session_start();
        $fname=$_POST['fname'];
        $lname=$_POST['lname'];
        $email=$_POST['email'];
        $pass=$_POST['pass'];
        $phone=$_POST['phone'];
        $sex_select=$_POST['sex_select'];
        $month=$_POST['month'];
        $day=$_POST['day'];
        $year=$_POST['year'];

        $result = mysql_query("INSERT INTO crop(fname, lname, email, pass, phone,`sex_select`, month,day,year)  
    VALUES ('$fname', '$lname', '$email', '$pass','$phone','$sex_select', '$month','$day','$year')");
    if(mysql_affected_rows()>1)
        {

        //it will redeirect you to. your any file. 
        //you can give any file name here. 
           $_SESSION['fname']=$fname;//you are adding value to the session
         $_SESSION['lanme']=$lname; //you are adding value to the session
    //Do this for rest of your value
    header('Location:Your_File_name.php');
        }



    if (!$result) {
        die(msg(0,"wrong query"));
    }
        ?>

在您重定向的文件中。你没有重定向。如果你不想重定向不重定向。但要理解这个概念你可以在start_start（）之后的任何地方访问这些$ _SESSION;在任何文件

    session_start();

//now you have access to all those value. which you stored in $_SESSION
echo $_SESSION['fname'];
echo $_SESSION['lanme'];
//In short which ever value you store in $_SESSSION you can echo them 
//out on any page.

在该文件中

<?php

//lets say there is one more file you want to do 
//that 

//do the same thing 

 session_start();

 echo $_SESSION['fname'];
echo $_SESSION['lanme'];

Answer 4

Markkh回答你，但也要确保你从$ _POST中逃脱输入，否则你会遇到SQL注入问题。 php.net/mysql_real_escape_string

从php中的sql数据库检索数据的问题

4 个答案: