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CRUD with PHP and MySQL

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In this tutorial we are going to discuss about simple CRUD (Create , Read , Update , Delete) PHP to manipulate database in MySQL , these are some of the basic things of PHP web application , Datas are insert , select update and delete using PHP and MySQL let's have a look.

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbSQgMpzAa0I8YEyO_ppmPnPnxM-57rYi2c-P_Qrw-3P2RH1VDxMvIPGyedpYQSEqjeAAzVnIGZIvzJYAKi3wWXvy8-ttVPML_GLjsQzrxF6wl3660NTv0v7syHmlONrIopkz8zeRubTQ/s1600/CRUD.gif

Database Design and Table which are used in this tutorial
Database name : dbtuts
Table name : users
Table Columns : first_name , last_name , user_city

Copy-Paste the following sql schema in your MySql database to create database and table.
 CREATE DATABASE `dbtuts` ;  
 CREATE TABLE `dbtuts`.`users` (  
 `user_id` INT( 10 ) NOT NULL AUTO_INCREMENT PRIMARY KEY ,  
 `first_name` VARCHAR( 25 ) NOT NULL ,  
 `last_name` VARCHAR( 25 ) NOT NULL ,  
 `user_city` VARCHAR( 45 ) NOT NULL  
 ) ENGINE = InnoDB;

Database Configuration :
dbconfig.php
 <?php  
 $host = "localhost";  
 $user = "root";  
 $password = "";  
 $datbase = "dbtuts";  
 mysql_connect($host,$user,$password);  
 mysql_select_db($datbase);  
 ?>


Create : insert new records

For providing user interface for the database insert, we should create a form, containing all the fields the users table has, except user_id which is auto generated numeric field. And, HTML code of ADD form will be as follows.
add_data.php
  
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
 <html xmlns="http://www.w3.org/1999/xhtml">  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
 <title>CRUD Operations With PHP and MySql - By Cleartuts</title>  
 <link rel="stylesheet" href="style.css" type="text/css" />  
 </head>  
 <body>  
 <center>  
 <div id="header">  
  <div id="content">  
   <label>CRUD Operations With PHP and MySql - By Cleartuts</label>  
   </div>  
 </div>  
 <div id="body">  
  <div id="content">  
   <form method="post">  
   <table align="center">  
   <tr>  
   <td align="center"><a href="index.php">back to main page</a></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="first_name" placeholder="First Name" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="last_name" placeholder="Last Name" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="city_name" placeholder="City" required /></td>  
   </tr>  
   <tr>  
   <td><button type="submit" name="btn-save"><strong>SAVE</strong></button></td>  
   </tr>  
   </table>  
   </form>  
   </div>  
 </div>  
 </center>  
 </body>

On the top of the html tag we need to put PHP code that handle database connection and insert new records into to the user table , So the code is as follow :
put the following php insert code just above starting tag
 <?php  
 include_once 'dbconfig.php';  
 if(isset($_POST['btn-save']))  
 {  
  // variables for input data  
  $first_name = $_POST['first_name'];  
  $last_name = $_POST['last_name'];  
  $city_name = $_POST['city_name'];  
  // variables for input data  
  // sql query for inserting data into database  
     $sql_query = "INSERT INTO users(first_name,last_name,user_city) VALUES('$first_name','$last_name','$city_name')";  
  mysql_query($sql_query);  
     // sql query for inserting data into database  
 }  
 ?>


Read : Retrieveng Records From table

After data insert we need to retrieve all the records from users table :
Retrieveng Records From users table
following is the php code for selecting records from table.
 $sql_query="SELECT * FROM users";  
 $result_set=mysql_query($sql_query);

Using the following while() loop we can fetch all the records from users table. For example
 <?php  
 $sql_query="SELECT * FROM users";  
 $result_set=mysql_query($sql_query);  
 while($row = mysql_fetch_array($result))  
 {  
   ?>  
   <!--Add HTML code here to display records.-->  
   <?php  
 }  
 ?>

After that, list of database records will be displayed to the browser, as shown below. And, this list contains icons to trigger update and delete operations for each record.
index.php
 <?php  
 include_once 'dbconfig.php';  
 ?>  
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
 <html xmlns="http://www.w3.org/1999/xhtml">  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
 <title>CRUD Operations With PHP and MySql - By Cleartuts</title>  
 <link rel="stylesheet" href="style.css" type="text/css" />  
 </head>  
 <body>  
 <center>  
 <div id="body">  
  <div id="content">  
   <table align="center">  
   <tr>  
   <th colspan="5"><a href="add_data.php">add data here.</a></th>  
   </tr>  
   <th>First Name</th>  
   <th>Last Name</th>  
   <th>City Name</th>  
   <th colspan="2">Operations</th>  
   </tr>  
   <?php  
  $sql_query="SELECT * FROM users";  
  $result_set=mysql_query($sql_query);  
  while($row=mysql_fetch_row($result_set))  
  {  
  ?>  
     <tr>  
     <td><?php echo $row[1]; ?></td>  
     <td><?php echo $row[2]; ?></td>  
     <td><?php echo $row[3]; ?></td>  
  <td align="center"><a href="javascript:edt_id('<?php echo $row[0]; ?>')"><img src="b_edit.png" align="EDIT" /></a></td>  
     <td align="center"><a href="javascript:delete_id('<?php echo $row[0]; ?>')"><img src="b_drop.png" align="DELETE" /></a></td>  
     </tr>  
     <?php  
  }  
  ?>  
   </table>  
   </div>  
 </div>  
 </center>  
 </body>  
 </html>


Update : Update MySQL records

For that we need to fetch the selected row from users table by using SELECT Query and the QueryString which are set in the edit_data.php url with edit_id=value.
 if(isset($_GET['edit_id']))  
 {  
  $sql_query="SELECT * FROM users WHERE user_id=".$_GET['edit_id'];  
  $result_set=mysql_query($sql_query);  
  $fetched_row=mysql_fetch_array($result_set);  
 }


after selecting data we need to execute UPDATE Query as follow
 if(isset($_POST['btn-update']))  
 {  
  // variables for input data  
  $first_name = $_POST['first_name'];  
  $last_name = $_POST['last_name'];  
  $city_name = $_POST['city_name'];  
  // variables for input data  
  // sql query for update data into database  
  $sql_query = "UPDATE users SET first_name='$first_name',last_name='$last_name',user_city='$city_name' WHERE user_id=".$_GET['edit_id'];  
     mysql_query($sql_query);  
  // sql query for update data into database  
 }

edit_data.php
 <?php  
 include_once 'dbconfig.php';  
 if(isset($_GET['edit_id']))  
 {  
  $sql_query="SELECT * FROM users WHERE user_id=".$_GET['edit_id'];  
  $result_set=mysql_query($sql_query);  
  $fetched_row=mysql_fetch_array($result_set);  
 }  
 if(isset($_POST['btn-update']))  
 {  
  // variables for input data  
  $first_name = $_POST['first_name'];  
  $last_name = $_POST['last_name'];  
  $city_name = $_POST['city_name'];  
  // variables for input data  
  // sql query for update data into database  
  $sql_query = "UPDATE users SET first_name='$first_name',last_name='$last_name',user_city='$city_name' WHERE user_id=".$_GET['edit_id'];  
     mysql_query($sql_query));  
  // sql query for update data into database   
 }  
 ?>  
 <html>  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
 <title>CRUD Operations With PHP and MySql - By Cleartuts</title>  
 <link rel="stylesheet" href="style.css" type="text/css" />  
 </head>  
 <body>  
 <center>  
 <div id="body">  
  <div id="content">  
   <form method="post"><  
   <table align="center">  
   <tr>  
   <td><input type="text" name="first_name" placeholder="First Name" value="<?php echo $fetched_row['first_name']; ?>" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="last_name" placeholder="Last Name" value="<?php echo $fetched_row['last_name']; ?>" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="city_name" placeholder="City" value="<?php echo $fetched_row['user_city']; ?>" required /></td>  
   </tr>  
   <tr>  
   <td>  
   <button type="submit" name="btn-update"><strong>UPDATE</strong></button>  
   </td>  
   </tr>  
   </table>  
   </form>  
   </div>  
 </div>  
 </center>  
 </body>  
 </html>


Delete : delete records from MySQL Table

By clicking on delete icon of any specified user record, the users id will set to the URL QueryString of the page and the QueryString index.php?delete_id=any_value if set the Sql Query DELETE will be executed by if(isset($_GET['delete_id'])) function , and delete statement is as follow :

 if(isset($_GET['delete_id']))  
 {  
  $sql_query="DELETE FROM users WHERE user_id=".$_GET['delete_id'];  
  mysql_query($sql_query);  
  header("Location: $_SERVER[PHP_SELF]");  
 }

put the above delete php code in index.php file above data insert code .
now there is CRUD operations are completed.
thats' it

dbconfig.php 
 <?php  
 $host = "localhost";  
 $user = "root";  
 $password = "";  
 $datbase = "dbtuts";  
 mysql_connect($host,$user,$password);  
 mysql_select_db($datbase);  
 ?>

index.php
 <?php  
 include_once 'dbconfig.php';  
 // delete condition  
 if(isset($_GET['delete_id']))  
 {  
  $sql_query="DELETE FROM users WHERE user_id=".$_GET['delete_id'];  
  mysql_query($sql_query);  
  header("Location: $_SERVER[PHP_SELF]");  
 }  
 // delete condition  
 ?>  
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
 <html xmlns="http://www.w3.org/1999/xhtml">  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
 <title>CRUD Operations With PHP and MySql - By Cleartuts</title>  
 <link rel="stylesheet" href="style.css" type="text/css" />  
 <script type="text/javascript">  
 function edt_id(id)  
 {  
  if(confirm('Sure to edit ?'))  
  {  
  window.location.href='edit_data.php?edit_id='+id;  
  }  
 }  
 function delete_id(id)  
 {  
  if(confirm('Sure to Delete ?'))  
  {  
  window.location.href='index.php?delete_id='+id;  
  }  
 }  
 </script>  
 </head>  
 <body>  
 <center>  
 <div id="header">  
  <div id="content">  
   <label>CRUD Operations With PHP and MySql - <a href="http://cleartuts.blogspot.com" target="_blank">By Cleartuts</a></label>  
   </div>  
 </div>  
 <div id="body">  
  <div id="content">  
   <table align="center">  
   <tr>  
   <th colspan="5"><a href="add_data.php">add data here.</a></th>  
   </tr>  
   <th>First Name</th>  
   <th>Last Name</th>  
   <th>City Name</th>  
   <th colspan="2">Operations</th>  
   </tr>  
   <?php  
  $sql_query="SELECT * FROM users";  
  $result_set=mysql_query($sql_query);  
  while($row=mysql_fetch_row($result_set))  
  {  
  ?>  
     <tr>  
     <td><?php echo $row[1]; ?></td>  
     <td><?php echo $row[2]; ?></td>  
     <td><?php echo $row[3]; ?></td>  
  <td align="center"><a href="javascript:edt_id('<?php echo $row[0]; ?>')"><img src="b_edit.png" align="EDIT" /></a></td>  
     <td align="center"><a href="javascript:delete_id('<?php echo $row[0]; ?>')"><img src="b_drop.png" align="DELETE" /></a></td>  
     </tr>  
     <?php  
  }  
  ?>  
   </table>  
   </div>  
 </div>  
 </center>  
 </body>  
 </html>

add_data.php
 <?php  
 include_once 'dbconfig.php';  
 if(isset($_POST['btn-save']))  
 {  
  // variables for input data  
  $first_name = $_POST['first_name'];  
  $last_name = $_POST['last_name'];  
  $city_name = $_POST['city_name'];  
  // variables for input data  
  // sql query for inserting data into database  
  $sql_query = "INSERT INTO users(first_name,last_name,user_city) VALUES('$first_name','$last_name','$city_name')";  
  // sql query for inserting data into database  
  // sql query execution function  
  if(mysql_query($sql_query))  
  {  
  ?>  
  <script type="text/javascript">  
  alert('Data Are Inserted Successfully ');  
  window.location.href='index.php';  
  </script>  
  <?php  
  }  
  else  
  {  
  ?>  
  <script type="text/javascript">  
  alert('error occured while inserting your data');  
  </script>  
  <?php  
  }  
  // sql query execution function  
 }  
 ?>  
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
 <html xmlns="http://www.w3.org/1999/xhtml">  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
 <title>CRUD Operations With PHP and MySql - By Cleartuts</title>  
 <link rel="stylesheet" href="style.css" type="text/css" />  
 </head>  
 <body>  
 <center>  
 <div id="header">  
  <div id="content">  
   <label>CRUD Operations With PHP and MySql - By Cleartuts</label>  
   </div>  
 </div>  
 <div id="body">  
  <div id="content">  
   <form method="post">  
   <table align="center">  
   <tr>  
   <td align="center"><a href="index.php">back to main page</a></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="first_name" placeholder="First Name" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="last_name" placeholder="Last Name" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="city_name" placeholder="City" required /></td>  
   </tr>  
   <tr>  
   <td><button type="submit" name="btn-save"><strong>SAVE</strong></button></td>  
   </tr>  
   </table>  
   </form>  
   </div>  
 </div>  
 </center>  
 </body>  
 </html>

edit_data.php
 <?php  
 include_once 'dbconfig.php';  
 if(isset($_GET['edit_id']))  
 {  
  $sql_query="SELECT * FROM users WHERE user_id=".$_GET['edit_id'];  
  $result_set=mysql_query($sql_query);  
  $fetched_row=mysql_fetch_array($result_set);  
 }  
 if(isset($_POST['btn-update']))  
 {  
  // variables for input data  
  $first_name = $_POST['first_name'];  
  $last_name = $_POST['last_name'];  
  $city_name = $_POST['city_name'];  
  // variables for input data  
  // sql query for update data into database  
  $sql_query = "UPDATE users SET first_name='$first_name',last_name='$last_name',user_city='$city_name' WHERE user_id=".$_GET['edit_id'];  
  // sql query for update data into database  
  // sql query execution function  
  if(mysql_query($sql_query))  
  {  
  ?>  
  <script type="text/javascript">  
  alert('Data Are Updated Successfully');  
  window.location.href='index.php';  
  </script>  
  <?php  
  }  
  else  
  {  
  ?>  
  <script type="text/javascript">  
  alert('error occured while updating data');  
  </script>  
  <?php  
  }  
  // sql query execution function  
 }  
 if(isset($_POST['btn-cancel']))  
 {  
  header("Location: index.php");  
 }  
 ?>  
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
 <html xmlns="http://www.w3.org/1999/xhtml">  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
 <title>CRUD Operations With PHP and MySql - By Cleartuts</title>  
 <link rel="stylesheet" href="style.css" type="text/css" />  
 </head>  
 <body>  
 <center>  
 <div id="header">  
  <div id="content">  
   <label>CRUD Operations With PHP and MySql - By Cleartuts</label>  
   </div>  
 </div>  
 <div id="body">  
  <div id="content">  
   <form method="post">  
   <table align="center">  
   <tr>  
   <td><input type="text" name="first_name" placeholder="First Name" value="<?php echo $fetched_row['first_name']; ?>" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="last_name" placeholder="Last Name" value="<?php echo $fetched_row['last_name']; ?>" required /></td>  
   </tr>  
   <tr>  
   <td><input type="text" name="city_name" placeholder="City" value="<?php echo $fetched_row['user_city']; ?>" required /></td>  
   </tr>  
   <tr>  
   <td>  
   <button type="submit" name="btn-update"><strong>UPDATE</strong></button>  
   <button type="submit" name="btn-cancel"><strong>Cancel</strong></button>  
   </td>  
   </tr>  
   </table>  
   </form>  
   </div>  
 </div>  
 </center>  
 </body>  
 </html>

style.css
 @charset "utf-8";  
 /* CSS Document */  
 *  
 {  
  margin:0;  
  padding:0;  
 }  
 body  
 {  
  background:#f9f9f9;  
  font-family:"Courier New", Courier, monospace;  
 }  
 #header  
 {  
  width:100%;  
  height:50px;  
  background:#00a2d1;  
  color:#f9f9f9;  
  font-family:"Lucida Sans Unicode", "Lucida Grande", sans-serif;  
  font-size:35px;  
  text-align:center;  
 }  
 #header a  
 {  
  color:#fff;  
  text-decoration:blink;  
 }  
 #body  
 {  
  margin-top:50px;  
 }  
 table  
 {  
  width:80%;  
  font-family:Tahoma, Geneva, sans-serif;  
  font-weight:bolder;  
  color:#999;  
  margin-bottom:80px;  
 }  
 table a  
 {  
  text-decoration:none;  
  color:#00a2d1;  
 }  
 table,td,th  
 {  
  border-collapse:collapse;  
  border:solid #d0d0d0 1px;  
  padding:20px;  
 }  
 table td input  
 {  
  width:97%;  
  height:35px;  
  border:dashed #00a2d1 1px;  
  padding-left:15px;  
  font-family:Verdana, Geneva, sans-serif;  
  box-shadow:0px 0px 0px rgba(1,0,0,0.2);  
  outline:none;  
 }  
 table td input:focus  
 {  
  box-shadow:inset 1px 1px 1px rgba(1,0,0,0.2);  
  outline:none;  
 }  
 table td button  
 {  
  border:solid #f9f9f9 0px;  
  box-shadow:1px 1px 1px rgba(1,0,0,0.2);  
  outline:none;  
  background:#00a2d1;  
  padding:9px 15px 9px 15px;  
  color:#f9f9f9;  
  font-family:Arial, Helvetica, sans-serif;  
  font-weight:bolder;  
  border-radius:3px;  
  width:49.5%;  
 }  
 table td button:active  
 {  
  position:relative;  
  top:1px;  
 }
Downloadable source code, please click this link.

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