Hi Guys, Every web programming language have database operations.
A very basic database operations are add,edit ,update and delete database records. In this tutorial I have to teach how to add ,edit,delete,update a record using php and mysql.
I have to add basic student details in database.I create and use four files to perform this basic database operations.
- Config.php
- Index.php
- edit-studentdetail.php
- Manage-students.php
Config.php
contains database connection Details.see the below code.
<?php
$con=mysql_connect('localhost','root',''); //Database Connections
$db=mysql_select_db('student',$con); // Database Name
?>
Index.php
index.php perform add student details in database .below code explain this operations.
<?php
include('config.php'); // Database Config
/* Add Student Detail Php */
if(isset($_POST['add'])) // Check form submit or not
{
$name=$_POST['name'];
$gender=$_POST['gender'];
$department=$_POST['dept'];
$terms=$_POST['terms'];
// Check all fields are empty or not if empty return error message
if($name=='' && $gender=='' && $department=='')
{
// Assign Messge variable
$msg="All fields are mandatary.Please fill It";
}
else
{
$query="INSERT INTO `student_detail`(name,gender,department,terms)values('$name','$gender','$department','$terms')";
$result=mysql_query($query);
if($result)
{
$msg="Student Detail Successfully Added"; // Success Message
echo '<meta http-equiv="refresh" content="0;manage-studentdetail.php?msg='.$msg.'" />';
}
}
}
?>
<h2><?php echo $msg ?></h2>
<table align="center" width="400px" cellpadding="5" cellspacing="5" bgcolor="#E6E6E6" border="1" rules="all">
<tr>
<td><a href="index.php">Add Student</a></td>
<td><a href="manage-studentdetail.php">Manage Student</a></td>
</tr>
</table>
<!-- Add Student Detail Form -->
<h3 align="center">Add Student Detail</h3>
<form method="post" action="<?php $_SERVER['PHP_SELF']?>">
<table align="center" width="500px" cellpadding="5" cellspacing="5">
<tr>
<td>Name:</td>
<td><input type="text" name="name" /></td>
</tr>
<tr>
<td>Gender:</td>
<td>
<input type="radio" name="gender" value="Male" />Male
<input type="radio" name="gender" value="Female" />Female
</td>
</tr>
<tr>
<td>Department:</td>
<td>
<select name="dept">
<option value="" selected="selected">Select Department</option>
<option value="CSE">CSE</option>
<option value="EEE">EEE</option>
<option value="ECE">ECE</option>
<option value="MECH">MECH</option>
</select>
</td>
</tr>
<tr>
<td>Hobby:</td>
<td>
<input type="checkbox" name="terms" value="Yes"/>
Accept Terms and conditions
</td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" name="add" value="Add student" /></td>
</table>
</form>
Edit-studentdetails.php
In this file perform edit and delete student record .see the below code
<?php
include('config.php'); // Database Config
/* Update Student Detail Php */
if(isset($_POST['uid'])) // Get id
{
$eid = $_POST['uid'];
$name=$_POST['name'];
$gender=$_POST['gender'];
$department=$_POST['dept'];
$terms=$_POST['terms'];
if($name=='' && $gender=='' && $department=='') // Check all fields are empty or not if empty return error message
{
$msg="All fields are mandatary.Please fill It"; // Assign Messge variable
}
else
{
$query="UPdate `student_detail` SET name='$name',gender='$gender',department='$department',terms='$terms' WHERE id='$eid'";
$result=mysql_query($query);
if($result)
{
$msg="Student Detail Updated"; // Success Message
echo '<meta http-equiv="refresh" content="0;manage-studentdetail.php?msg='.$msg.'" />';
}
}
}
?>
<?php
$eid=$_GET['id'];
$getdata=mysql_query("SELECT * FROM `student_detail` WHERE id='$eid'");
$row=mysql_fetch_array($getdata);
?>
<h2><?php echo $msg ?></h2>
<!-- Edit Student Detail Form -->
<form method="post" action="<?php $_SERVER['PHP_SELF']?>">
<table align="center" width="500px" cellpadding="5" cellspacing="5">
<tr>
<td>Name:</td>
<td><input type="text" name="name" value="<?php echo $row['name']?>" /</td>
</tr>
<tr>
<td>Gender:</td>
<td>
<input type="radio" name="gender" value="Male" <?php if($row['gender']=='Male') {?> checked="checked" <? } ?> />Male
<input type="radio" name="gender" value="Female" <?php echo $row['gender']?>
<?php if($row['gender']=='Female') {?> checked="checked" <? } ?> />Female
</td>
</tr>
<tr>
<td>Department:</td>
<td>
<select name="dept">
<option value="CSE" <?php if($row['department']=='CSE') {?> selected="selected" <? } ?>>CSE</option>
<option value="EEE" <?php if($row['department']=='EEE') {?> selected="selected" <? } ?>>EEE</option>
<option value="ECE" <?php if($row['department']=='ECE') {?> selected="selected" <? } ?>>ECE</option>
<option value="MECH" <?php if($row['department']=='MECH') {?> selected="selected" <? } ?>>MECH</option>
</select>
</td>
</tr>
<tr>
<td>Terms:</td>
<td>
<input type="checkbox" name="terms" value="Yes" <?php echo $row['terms']?><?php if($row['terms']=='Yes') {?> checked="checked"
<? } ?>/>Accept Terms and conditions
</td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="hidden" name="uid" value="<?php echo $eid ?>" />
<input type="submit" name="update" value="Update" /></td>
</table>
</form>
Next Manage-students.php
Manage-students.php perform show all students details fetch from database with edit and delete link. Edit link perform edit student record and update record operations, delete link perform delete a particular record in database.In the below code explain this operations
<?php
include('config.php'); // Database Config
/* Delete Student Detail Php */
if(isset($_GET['did'])) // Get Id
{
$did=$_GET['did'];
$query="DELETE FROM `student_detail` WHERE id='$did'";
$result=mysql_query($query);
if($result)
{
$msg="Student Detail Deleted Successfully "; // Success Message
}
}
?>
<?php
if(isset($_GET['msg']))
{
?>
<h2 align="center"><?php echo $_GET['msg'] // Message From Edit Page?></h2>
<?
}
?>
<h2 align="center"><?php echo $msg ?></h2>
<table align="center" width="400px" cellpadding="5" cellspacing="5" bgcolor="#E6E6E6" border="1" rules="all">
<tr>
<td><a href="index.php">Add Student</a></td>
<td><a href="manage-studentdetail.php">Manage Student</a></td>
</tr>
</table>
<!-- Manage Student Detail -->
<table align="center" width="500px" cellpadding="5" cellspacing="5" border="1px" rules="all">
<tr>
<td>S.no</td>
<td>Name</td>
<td>Gender</td>
<td>Department</td>
<td>Terms</td>
<td>Edit</td>
<td>Delete</td>
</tr>
<?php
$i=1;
$getdata=mysql_query("SELECT * FROM `student_detail`");
while($row=mysql_fetch_array($getdata))
{
?>
<tr>
<td><?php echo $i ?></td>
<td><?php echo $row['name'];?></td>
<td>
<?php echo $row['gender'];?>
</td>
<td><?php echo $row['department'];?></td>
<td>
<?php echo $row['terms'];?>
</td>
<td><a href="edit-studentdetail.php?id=<?php echo $row['id']?>">Edit</a></td>
<td><a href="manage-studentdetail.php?did=<?php echo $row['id']?>">Delete</a></td>
</tr>
<?
$i++;
}
?>
</table>
I hope in this tutorial give a basic idea about database operations using php and mysql. If you any doubt please leave a comment.
I’m totally new in php
and i just want to know that how this is actually work
(
if(isset($_POST[‘uid’]))
)
can you please tell how this statement is actaully work.
and why should we
$query=”UPdate `student_detail` SET name=’$name’,gender=’$gender’,department=’$department’,terms=’$terms'”;
$result=mysql_query($query);
again pass the values to $result variable if we already pass it in the $query variable?
I know this very simple things but until i don’t know why I’m writing that things I’ll never become a master in php pls help me
thanks for great help..
1 small issue is that when i update 1 row of data , all other data gets set to same data..