CRUD Operation In PHP

Today we will see how to create CRUD Operation In PHP,if you are new developer or fresher in web developing then crud operations in php using mysql example help you to learn how to create login-logout with insert update delete record in php.

So,let's see crud operations in php using mysql.

CRUD (Create, Read, Update,Delete) operation is most important part when you are developing your website with backed, I have added some code and simple example of CRUD with steps.

 

Step 1 - Create Folder in xampp for CRUD Operation in PHP,
Step 2 - Create Config File and Add Database
Step 3 - Create Display File
Step 4 - Create Login-Logout File
Step 5 - Create Update Delete File

 

 

Step 1 :  Create Folder And Add New File 

So, basically if you are not aware about php then you need to check it in internet for basic requirements of php language, We need xampp/wamp server for run php script and mysql database and i had already installed So,here i will directly create new folder and set name as crud_php in xampp folder and after that i have added one file witn name like cofig.php.

After that you need to add below code in config.php file

<?php
$con = mysqli_connect("localhost", "root", "")
or
die("Couldn't connect to database");
$select = mysqli_select_db($con,"demo")
or
die("Database not found");
?>

In this file i have code for database connection with mysql and we are creating demo database for our example.

 

Step 2 : Create Signup Page

We need to add entry in database using signup page.So, we need to add 2 pages for signup first one for connection or sql query(action page) and second for view, i have added code as below.

1) signup 1.php 

<?php
include_once 'config.php';

$username = $_POST['username'];
$password = $_POST['password'];
$email = $_POST['email'];
$department = $_POST['department'];
$query = "insert into register values(NULL,'$username','$password','$email','$department')";
$result = mysqli_query($con,$query);
if($result)
{
	header("location: login.php");
}
?>

2) signup.php

<html>
<head>
<title>Sign up</title>
<style>
body{
 	background-image:url("6.jpg");
	background-size:cover;
	background-repeat:no-repeat;
}
.division{
	background: white;
	opacity:0.9;
	border: 0 none;
	border-radius: 3px;
	box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
	padding: 20px 30px;
	box-sizing: border-box;
	width: 30%;
	margin: 7% 20% 0% 33%;
	display:block;
position: relative;
}
input{
	padding: 15px;
	border: 1px solid #ccc;
	border-radius: 3px;
	margin-bottom: 10px;
	width: 100%;
	box-sizing: border-box;
	font-family: montserrat;
	color: #2C3E50;
	font-size: 20px;
}
.more{
	font-size:30px;
	font-style:solid;
	font-family:Arial;
	background-color:#00ff99;
}	
</style>
</head>
<body>
<div class="division">
	<form name="reg" action="signup1.php" method="post">
		<table cellpadding="5" align="center">
		<tr>
			<td><input type="text" name="username" placeholder="User Name" required/></td>
		</tr>
		<tr>
			<td><input type="password" name="password" placeholder="Password" required/></td>
		</tr>
		<tr>
			<td><input type="email" name="email" placeholder="Email" required/></td>
		</tr>
		<tr>			
			<td><input type="text" name="department" placeholder="Department" required/></td>
		</tr>
		<tr>
			<td><input class="more" type="submit"  value="submit"></td>
		</tr>	
		</table>
		<center><a href="login.php">Log in</a></center>
	</form>
</div>
</body>
</html>

 

 

Step 3 : Create Login Page

Now we are creating login page So, i have added 2 diffrent pages 1st page for action and 2nd for display.

1) login 1.php

<?php
include_once 'config.php';
$username = $_REQUEST['username'];
$password = $_REQUEST['password'];
$_session["uname"]=$username;
$query="select * from register where username='$username' and password='$password'";
$result=mysqli_query($con,$query);
$num=mysqli_num_rows($result);
if($num >= 1)
{
		header("location:display.php?username=$username");
}
else
{
	echo '<script type="text/javascript">alert("Enter valid username and password"); window.location = "login.php";</script>';
}
?>

 

2) login.php

<html>
<head>
<title>Log in</title>

<style>
body{
 	background-image:url("6.jpg");
	background-size:cover;
	background-repeat:no-repeat;
}
.division{
	background: white;
	opacity:0.9;
	border: 0 none;
	border-radius: 3px;
	box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
	padding: 20px 30px;
	box-sizing: border-box;
	width: 30%;
	margin: 10% 20% 0% 33%;
	display:block; 
position: relative;
}
input{
	padding: 15px;
	border: 1px solid #ccc;
	border-radius: 3px;
	margin-bottom: 10px;
	width: 100%;
	box-sizing: border-box;
	font-family: montserrat;
	color: #2C3E50;
	font-size: 20px;
}
.more{
	font-size:30px;
	font-style:solid;
	font-family:Arial;
	background-color:#00ff99;
	
}	
</style>
</head>
<body>
<div class="division">
	<form name="reg" action="login1.php" method="post">
		<table  cellpadding="5" align="center">
		<tr>
			<td><input type="text" name="username" placeholder="User Name" required/></td> 
		</tr>
		<tr>
			<td><input type="password" name="password" placeholder="Password" required/></td>
		</tr>
		<tr>
			<td><input type="submit" class="more" value="log in" ></td>
		</tr>
		</table>
		<center><a href="signup.php">Sign up</a></center>
	</form>
</div>
</body>
</html>

 

 

Step 4 : Create View Page

 Now, We need to create display page to view our inserted records in database so i have created display.php page for same.

<?php
	include 'config.php';
	session_start();
	if(isset($_REQUEST['username'])){
	$username=$_REQUEST['username'];
	$_SESSION['uname']=$username;
	}
?>
<html>
<head>
<title>display</title>
<style>
body{
 	background-image:url("6.jpg");
	background-size:cover;
	background-repeat:no-repeat;
}
.division{
	background: white;
	opacity:0.9;
	border: 0 none;
	border-radius: 3px;
	box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
	padding: 20px 30px;
	box-sizing: border-box;
	width: 55%;
	margin: 10% 20% 0% 20%;
	display:block;
	position: relative;
}
input,th{
	padding: 15px;
	border: 1px solid #000;
	width: 100%;
	box-sizing: border-box;
	font-family: montserrat;
	color: #fff;
	text-size: 20px;
	background-color:#337ab7;
}
.done{	
	font-size:auto;
	font-style:solid;
	font-family:Arial;
	background-color:#449d44;
	margin-top: 10px;
}
</style>
</head>
<body>
<div class="division">
	<table  cellpadding="5" border="1px black solid">
	<tr>
		<th>Name</th>
		<th>Email</th>
		<th>Department</th>
		<th colspan="2">Action</th>
	</tr>
	<?php	
	$query="select * from register";
	$result=mysqli_query($con,$query);
	echo "Welcome ";
	echo $_SESSION['uname'];
	while($db=mysqli_fetch_array($result))
	{	?>
	
		<tr>
		
			<td><?php echo $db['username']?></td>
			<td><?php echo $db['email']?></td>
			<td><?php echo $db['department']?></td>
			<td><a href="update.php?update=<?php echo $db['id'];?>"><input type="submit" style="color: #fff;background-color: #337ab7;border-color: #2e6da4;" value="Update"/></a></td>
			<td><a href="delete.php?delete=<?php echo $db['id'];?>"><input type="submit" style="color: #fff;background-color: red;" value="Delete"/></a></td>
		</tr>
		
			<?php
	}
	?>
	</table>
	
	<td><a href="logout.php" ><input type="submit" name="logout" class="done" value="Log out" ></a></td>
			
</div>
</body>
</html>

 

Step 5 : Create Page for Update Records

Now if you want to update or edit your records then you need to create 2 diffrent php page 1st for action of updations and second for view. So i have added both php page code as below.

1) update 1.php

<?php
include_once 'config.php';
session_start();
$id=$_POST['id'];
$username= $_POST['username'];
$password = $_POST['password'];
$email = $_POST['email'];
$department = $_POST['department'];
$query = "UPDATE register SET username='$username',password='$password', email='$email', department='$department' WHERE id='$id'";
$result = mysqli_query($con,$query);
if ($result) {
	header("location: display.php");
}
?>

 

 

2) update.php

<?php 
include_once 'config.php';
session_start();
$id = $_REQUEST['update'];
$query = "SELECT * FROM register WHERE id='$id';";
$result = mysqli_query($con,$query);
$row = mysqli_fetch_assoc($result);
?>
<html>
<head>
<title>Update student</title>
<style>
body{
 	background-image:url("6.jpg");
	background-size:cover;
	background-repeat:no-repeat;	
}
.division{
	background: white;
	opacity:0.9;
	border: 0 none;
	border-radius: 3px;
	box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
	padding: 20px 30px;
	box-sizing: border-box;
	width: 30%;
	margin: 7% 20% 0% 33%;
	display:block;
	position: relative;
}
input{
	padding: 15px;
	border: 1px solid #ccc;
	border-radius: 3px;
	margin-bottom: 10px;
	width: 100%;
	box-sizing: border-box;
	font-family: montserrat;
	color: #2C3E50;
	font-size: 20px;
}
.more{
	font-size:30px;
	font-style:solid;
	font-family:Arial;
	background-color:#00ff99;
	
}	
</style>
</head>
<body>
<div class="division">
	<h1>Update Student</h1>
	<form action="update1.php" method="POST">
		<input type="hidden" name="id" value="<?php echo $row['id'];?>">
		UserName: <input type="text" name="username" size="30" value="<?php echo $row['username'];?>">
		<br>
		Password: <input type="text" name="password" size="30" value="<?php echo $row['password'];?>">
		<br>
		email id <input type="text" name="email" size="30" value="<?php echo $row['email'];?>">
		<br>
		Department <input type="text" name="department" size="30" value="<?php echo $row['department'];?>">
		<br>
		<input type="submit" class="more" name="submit" value="Update Student">
	</form>
</div>
</body>
</html>

 

Step 6 : Delete Records

 Now if you want to delete records then you need to required below code. Add this code in your file and save as delete.php

<?php
include_once 'config.php';

$id = $_REQUEST[delete];
$query = "delete from register where id='$id' ";
$result = mysqli_query($con,$query);

if($result)
{
	header("location: display.php");
}
?>

 

Step 7 : Logout page

Now, add below code for logout from current session.

<?php
	session_start();
	session_destroy();
	include 'config.php';
	header("location: login.php");
?>

 


 

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