crud operations in php using mysqli – PHP Crud Operations – Select, Insert, Update, Delete – PHP Tutorial For Beginners

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crud operations in php using mysqli : Create, Read, Update, Delete (CRUD) in PHP using mysqli Step by step Example.

crud operations in php using mysqli

PHP CRUD Operations with MySQLi Extension – CRUD is an acronym for Create, Read, Update, and Delete. CRUD operations are basic data manipulation for database.

Create a simple CRUD(Create, Read, Update, and Delete) application using PHP MySQLi with MySQL database.

files structure

create crud operations in php using mysqli files structure.

first_project_in_php/
├── index.php
├── memberCrud.php
├── memberAction.php
├── DB.class.php
├── bootstrap/
│   └── bootstrap.min.css
├── css/
│   └── style.css
└── images/

In this Basic OOP PHP CRUD Operation using PHP/MySQLi with Bootstrap tutorial we will learn about php from Scratch.

Create Database Table

First, we will see the Database Part.
SQL creates a members table

CREATE TABLE `members` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
 `email_address` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
 `mobile` varchar(20) COLLATE utf8_unicode_ci NOT NULL,
 `created` datetime NOT NULL,
 `updated_at` datetime NOT NULL,
 `confirms` enum('1','0') COLLATE utf8_unicode_ci NOT NULL DEFAULT '1' COMMENT '1=Active, 0=Inactive',
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

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Database Class

DB.class.php

<?php
/*
 * Database Class
 * This class is used for database related (connect, insert, update, and delete) operations
 * @author    Pakainfo.com
 * @url        http://www.pakainfo.com
 * @license    http://www.pakainfo.com/license
 */
class DB{
    private $dbHost     = "localhost";
    private $dbUsername = "root";
    private $dbPassword = "member#riu5787";
    private $dbName     = "pakainfo_v1";
    
    public function __construct(){
        if(!isset($this->db)){
            $conn = new mysqli($this->dbHost, $this->dbUsername, $this->dbPassword, $this->dbName);
            if($conn->connect_error){
                die("Failed to connect with MySQL: " . $conn->connect_error);
            }else{
                $this->db = $conn;
            }
        }
    }
    
    public function getRows($table, $controls = array()){
        $sql = 'SELECT ';
        $sql .= array_key_exists("select",$controls)?$controls['select']:'*';
        $sql .= ' FROM '.$table;
        if(array_key_exists("where",$controls)){
            $sql .= ' WHERE ';
            $i = 0;
            foreach($controls['where'] as $key => $value){
                $pre = ($i > 0)?' AND ':'';
                $sql .= $pre.$key." = '".$value."'";
                $i++;
            }
        }
        
        if(array_key_exists("order_by",$controls)){
            $sql .= ' ORDER BY '.$controls['order_by']; 
        }else{
            $sql .= ' ORDER BY id DESC '; 
        }
        
        if(array_key_exists("start",$controls) && array_key_exists("limit",$controls)){
            $sql .= ' LIMIT '.$controls['start'].','.$controls['limit']; 
        }elseif(!array_key_exists("start",$controls) && array_key_exists("limit",$controls)){
            $sql .= ' LIMIT '.$controls['limit']; 
        }
        
        $result = $this->db->query($sql);
        
        if(array_key_exists("return_type",$controls) && $controls['return_type'] != 'all'){
            switch($controls['return_type']){
                case 'count':
                    $data = $result->num_rows;
                    break;
                case 'single':
                    $data = $result->fetch_assoc();
                    break;
                default:
                    $data = '';
            }
        }else{
            if($result->num_rows > 0){
                while($row = $result->fetch_assoc()){
                    $data[] = $row;
                }
            }
        }
        return !empty($data)?$data:false;
    }
    
    public function insert($table, $data){
        if(!empty($data) && is_array($data)){
            $columns = '';
            $values  = '';
            $i = 0;
            if(!array_key_exists('created',$data)){
                $data['created'] = date("Y-m-d H:i:s");
            }
            if(!array_key_exists('updated_at',$data)){
                $data['updated_at'] = date("Y-m-d H:i:s");
            }
            foreach($data as $key=>$val){
                $pre = ($i > 0)?', ':'';
                $columns .= $pre.$key;
                $values  .= $pre."'".$this->db->real_escape_string($val)."'";
                $i++;
            }
            $query = "INSERT INTO ".$table." (".$columns.") VALUES (".$values.")";
            $insert = $this->db->query($query);
            return $insert?$this->db->insert_id:false;
        }else{
            return false;
        }
    }
    
    public function update($table, $data, $controls){
        if(!empty($data) && is_array($data)){
            $colvalSet = '';
            $whereSql = '';
            $i = 0;
            if(!array_key_exists('updated_at',$data)){
                $data['updated_at'] = date("Y-m-d H:i:s");
            }
            foreach($data as $key=>$val){
                $pre = ($i > 0)?', ':'';
                $colvalSet .= $pre.$key."='".$this->db->real_escape_string($val)."'";
                $i++;
            }
            if(!empty($controls)&& is_array($controls)){
                $whereSql .= ' WHERE ';
                $i = 0;
                foreach($controls as $key => $value){
                    $pre = ($i > 0)?' AND ':'';
                    $whereSql .= $pre.$key." = '".$value."'";
                    $i++;
                }
            }
            $query = "UPDATE ".$table." SET ".$colvalSet.$whereSql;
            $update = $this->db->query($query);
            return $update?$this->db->affected_rows:false;
        }else{
            return false;
        }
    }
    
    public function delete($table, $controls){
        $whereSql = '';
        if(!empty($controls)&& is_array($controls)){
            $whereSql .= ' WHERE ';
            $i = 0;
            foreach($controls as $key => $value){
                $pre = ($i > 0)?' AND ':'';
                $whereSql .= $pre.$key." = '".$value."'";
                $i++;
            }
        }
        $query = "DELETE FROM ".$table.$whereSql;
        $delete = $this->db->query($query);
        return $delete?true:false;
    }
}

CRUD Operations

memberAction.php

<?php
session_start();

require_once 'DB.class.php';
$db = new DB();

$tblName = 'members';

$redirectURL = 'index.php';

if(isset($_POST['memberSubmit'])){
    $name     = trim(strip_tags($_POST['name']));
    $email_address    = trim(strip_tags($_POST['email_address']));
    $mobile    = trim(strip_tags($_POST['mobile']));
    
    $errorMsg = '';
    if(empty($name)){
        $errorMsg .= '<p>Please enter your name.</p>';
    }
    if(empty($email_address) || !filter_var($email_address, FILTER_VALIDATE_EMAIL)){
        $errorMsg .= '<p>Please enter a valid email_address.</p>';
    }
    if(empty($mobile) || !preg_match("/^[-+0-9]{6,20}$/", $mobile)){
        $errorMsg .= '<p>Please enter a valid mobile number.</p>';
    }
    
    $memberDetails = array(
        'name' => $name,
        'email_address' => $email_address,
        'mobile' => $mobile
    );
    
    $membersInfo['memberDetails'] = $memberDetails;
    
    if(empty($errorMsg)){
        if(!empty($_POST['id'])){
            $condition = array('id' => $_POST['id']);
            $update = $db->update($tblName, $memberDetails, $condition);
            
            if($update){
                $membersInfo['confirms']['type'] = 'success';
                $membersInfo['confirms']['msg'] = 'Member data has been updated successfully.';
                
                unset($membersInfo['memberDetails']);
            }else{
                $membersInfo['confirms']['type'] = 'error';
                $membersInfo['confirms']['msg'] = 'Some problem occurred, please try again.';
                
                $redirectURL = 'memberCrud.php';
            }
        }else{
            $insert = $db->insert($tblName, $memberDetails);
            
            if($insert){
                $membersInfo['confirms']['type'] = 'success';
                $membersInfo['confirms']['msg'] = 'Member data has been added successfully.';
                
                unset($membersInfo['memberDetails']);
            }else{
                $membersInfo['confirms']['type'] = 'error';
                $membersInfo['confirms']['msg'] = 'Some problem occurred, please try again.';
                
                $redirectURL = 'memberCrud.php';
            }
        }
    }else{
        $membersInfo['confirms']['type'] = 'error';
        $membersInfo['confirms']['msg'] = '<p>Please fill all the mandatory fields.</p>'.$errorMsg;
        
        $redirectURL = 'memberCrud.php';
    }
    
    $_SESSION['membersInfo'] = $membersInfo;
}elseif(($_REQUEST['action_type'] == 'delete') && !empty($_GET['id'])){

    $condition = array('id' => $_GET['id']);
    $delete = $db->delete($tblName, $condition);
    
    if($delete){
        $membersInfo['confirms']['type'] = 'success';
        $membersInfo['confirms']['msg'] = 'Member data has been deleted successfully.';
    }else{
        $membersInfo['confirms']['type'] = 'error';
        $membersInfo['confirms']['msg'] = 'Some problem occurred, please try again.';
    }
    
    $_SESSION['membersInfo'] = $membersInfo;
}

header("Location:".$redirectURL);
exit();
?>

Bootstrap Library

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">

Read & Delete Records

index.php

<?php
session_start();

$membersInfo = !empty($_SESSION['membersInfo'])?$_SESSION['membersInfo']:'';

require_once 'DB.class.php';
$db = new DB();

$members = $db->getRows('members');

if(!empty($membersInfo['confirms']['msg'])){
    $confirmsMsg = $membersInfo['confirms']['msg'];
    $confirmsMsgType = $membersInfo['confirms']['type'];
    unset($_SESSION['membersInfo']['confirms']);
}
?>

<div class="container">
    <h2>crud operations in php using mysqli</h2>
	
    <!-- Display confirms message -->
    <?php if(!empty($confirmsMsg) && ($confirmsMsgType == 'success')){ ?>
    <div class="col-xs-12">
        <div class="alert alert-success"><?php echo $confirmsMsg; ?></div>
    </div>
    <?php }elseif(!empty($confirmsMsg) && ($confirmsMsgType == 'error')){ ?>
    <div class="col-xs-12">
        <div class="alert alert-danger"><?php echo $confirmsMsg; ?></div>
    </div>
    <?php } ?>
	
    <div class="row">
        <div class="col-md-12 head">
            <h5>Member</h5>
            <!-- Add link -->
            <div class="float-right">
                <a href="memberCrud.php" class="btn btn-success"><i class="plus"></i> New Member</a>
            </div>
        </div>
        
        <!-- List the members -->
        <table class="table table-striped table-bordered">
            <thead class="thead-dark">
                <tr>
                    <th>#</th>
                    <th>Name</th>
                    <th>Email Address</th>
                    <th>Mobile</th>
                    <th>Action</th>
                </tr>
            </thead>
            <tbody id="memberDetails">
                <?php if(!empty($members)){ $count = 0; foreach($members as $row){ $count++; ?>
                <tr>
                    <td><?php echo $count; ?></td>
                    <td><?php echo $row['name']; ?></td>
                    <td><?php echo $row['email_address']; ?></td>
                    <td><?php echo $row['mobile']; ?></td>
                    <td>
                        <a href="memberCrud.php?id=<?php echo $row['id']; ?>" class="btn btn-warning">edit</a>
                        <a href="memberAction.php?action_type=delete&id=<?php echo $row['id']; ?>" class="btn btn-danger" onclick="return confirm('Are you sure to delete?');">delete</a>
                    </td>
                </tr>
                <?php } }else{ ?>
                <tr><td colspan="5">No member(s) found...</td></tr>
                <?php } ?>
            </tbody>
        </table>
    </div>
</div>

Create & Update Records

memberCrud.php

<?php
session_start();

$membersInfo = !empty($_SESSION['membersInfo'])?$_SESSION['membersInfo']:'';

$memberDetails = array();
if(!empty($_GET['id'])){
    include 'DB.class.php';
    $db = new DB();
    
    $controls['where'] = array(
        'id' => $_GET['id'],
    );
    $controls['return_type'] = 'single';
    $memberDetails = $db->getRows('members', $controls);
}
$memberDetails = !empty($membersInfo['memberDetails'])?$membersInfo['memberDetails']:$memberDetails;
unset($_SESSION['membersInfo']['memberDetails']);

$actionLabel = !empty($_GET['id'])?'Edit':'Add';

if(!empty($membersInfo['confirms']['msg'])){
    $confirmsMsg = $membersInfo['confirms']['msg'];
    $confirmsMsgType = $membersInfo['confirms']['type'];
    unset($_SESSION['membersInfo']['confirms']);
}

?>

<div class="container">
    <h2><?php echo $actionLabel; ?> Member</h2>
    
    <?php if(!empty($confirmsMsg) && ($confirmsMsgType == 'success')){ ?>
    <div class="col-xs-12">
        <div class="alert alert-success"><?php echo $confirmsMsg; ?></div>
    </div>
    <?php }elseif(!empty($confirmsMsg) && ($confirmsMsgType == 'error')){ ?>
    <div class="col-xs-12">
        <div class="alert alert-danger"><?php echo $confirmsMsg; ?></div>
    </div>
    <?php } ?>
    
    <div class="row">
         <div class="col-md-6">
             <form method="post" action="memberAction.php">
                <div class="form-group">
                    <label>Name</label>
                    <input type="text" class="form-control" name="name" placeholder="Enter name" value="<?php echo !empty($memberDetails['name'])?$memberDetails['name']:''; ?>" >
                </div>
                <div class="form-group">
                    <label>Email</label>
                    <input type="text" class="form-control" name="email_address" placeholder="Enter email address" value="<?php echo !empty($memberDetails['email_address'])?$memberDetails['email_address']:''; ?>" >
                </div>
                <div class="form-group">
                    <label>Mobile</label>
                    <input type="text" class="form-control" name="mobile" placeholder="Enter mobile number" value="<?php echo !empty($memberDetails['mobile'])?$memberDetails['mobile']:''; ?>" >
                </div>
                
                <a href="index.php" class="btn btn-secondary">Back</a>
                <input type="hidden" name="id" value="<?php echo !empty($memberDetails['id'])?$memberDetails['id']:''; ?>">
                <input type="submit" name="memberSubmit" class="btn btn-success" value="Submit">
            </form>
        </div>
    </div>
</div>


I hope you get an idea about crud operations in php using mysqli.
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