使用php在HTML文本框中检索mysql表格值

在我的网页中，我无法检索mysql的表值并将其显示在html文本框中。当我运行我的网页时，它没有显示任何值。有人请帮助我。 P.S：我的数据库名称和表名是正确的。使用php在HTML文本框中检索mysql表格值

studentsearch.php

<?php 
$hostname_localhost ="localhost"; 
$database_localhost ="mydatabase"; 
$username_localhost ="root"; 
$password_localhost =""; 
$localhost = mysql_connect($hostname_localhost,$username_localhost,$password_localhost) 
or 
trigger_error(mysql_error()); 

mysql_select_db($database_localhost, $localhost); 
$rollno=$_POST['rollno']; 
$submit=$_POST['submit']; 
if(isset($submit)) 
{ 
$query_search = "select * from student where srollno='$rollno'"; 
$rowval = mysql_fetch_array($query_search); 
$sname= $rowval['sname']; 
$srollno= $rowval['srollno']; 
$email= $rowval['email']; 
$dept= $rowval['dept']; 
$phoneno= $rowval['phoneno']; 
} 
?> 


<html> 
<head> 
<style> 
@import url(http://fonts.googleapis.com/css?family=Exo:100,200,400); 
    @import url(http://fonts.googleapis.com/css?family=Source+Sans+Pro:700,400,300); 

    body{ 
    margin: 0; 
    padding: 0; 
    background: #fff; 

    color: #fff; 
    font-family: Arial; 
    font-size: 12px; 
    } 

    .body{ 
    position: absolute; 
    top: -20px; 
    left: -20px; 
    right: -40px; 
    bottom: -40px; 
    width: auto; 
    height: auto; 
    background-image: url(images/signinback.png); 
    background-size: cover; 
    -webkit-filter: blur(5px); 
    z-index: 0; 
    } 

    .grad{ 
    position: absolute; 
    top: -20px; 
    left: -20px; 
    right: -40px; 
    bottom: -40px; 
    width: auto; 
    height: auto; 
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(0,0,0,0)), color-stop(100%,rgba(0,0,0,0.65))); /* Chrome,Safari4+ */ 
    z-index: 1; 
    opacity: 0.7; 
    } 
h3 { 
     margin: 0 15px 20px; 
     border-bottom: 2px solid; 
     padding: 5px 10px 5px 0; 
     font-size: 3.1em; 
    } 

    .two{ 
position: absolute; 
    top: calc(50% - 75px); 
    left: calc(50% - 50px); 
    height: 450px; 
    width: 650px; 
    padding: 10px; 
    z-index: 2; 
     margin: 0 0 15px 0; 
     border : none; 
    } 
    label { 
     display: inline-block; 
     width: 25%; 
     text-align: right; 
     margin: 10px 
    } 



    .button { 
     font-size: 1em; 
     border-radius: 8px; 
     padding: 10px; 
     border: 1px solid #59B969; 
     box-shadow: 0 1px 0 0 #60BD49 inset; 

    } 


</style> 
</head> 
<body background="webback.png"> 
<div class="body"></div> 
    <div class="grad"></div> 
<div class="two"> 
     <div class="register"> 
      <h3>STUDENT SEARCH</h3> 
      <form method="post" name="studentsearch" onsubmit="val();"> 

      <div> 
       <label for="rollno">Enter student rollno</label> 
       <input type="text" name="rollno" > 
</div> 
       <div> 
       <input type="submit" value="submit" name="submit"/> 

      </div> 

      <div> 
       <label for="sname">Student Name</label> 
       <input type="text" name="sname" value="<?php echo $rowval['sname']; ?>"> 
      </div> 
      <div> 
       <label for="srollno">Student Roll Number:</label> 
       <input type="text" name="srollno" value="<?php echo $rowval['srollno']; ?>"> 
      </div> 
      <div> 
       <label for="email">Student Email Id:</label> 
       <input type="text" name="email" value="<?php echo $rowval['email']; ?>"> 
      </div> 
<div> 
       <label for="dept">Department</label> 
       <input type="text" name="dept" value="<?php echo $rowval['dept']; ?>"> 
      </div> 

<div> 
       <label for="phoneno">Phone Number</label> 
       <input type="text" name="phoneno" value="<?php echo $rowval['phoneno']; ?>"> 
      </div> 

     </form> 
     </div> 
</div> 
</div> 

</body> 
</html>

来源

2015-03-19 Anitha Murali

-1

您使用mysql_fetch_array与字符串作为参数。您需要水木清华这样的：

$sql = "select * from student where srollno='$rollno'"; 
$query = mysql_query($sql); 
$value = mysql_fetch_array($query);

由于documentaion参数必须是返回的请求mysql_query

资源，但我强烈建议你使用的mysqli或PDO。例如mysqli：

$query = "select * from student where srollno='$rollno'"; 
$result = $mysqli->query($query); 
$row = $result->fetch_array();

来源

2015-03-19 06:50:47 skad0

Thankyou so much..It works now – 2015-03-19 06:57:39

使用php在HTML文本框中检索mysql表格值

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