Email validation is an important part of any application and especially, when we use email as username in our application and you want to make sure that user enter a valid and unique email address.

In CakePHP application we can define email validation rule in the Model like below:

<?php

class User extends AppModel {

	public $validate = array(
		'email' => array(
			'mustNotEmpty' => array(
				'rule' => 'notEmpty',
				'message' => 'Please enter a email.',
				'last' => true
			) ,
			'mustBeEmail' => array(
				'rule' => array(
					'email'
				) ,
				'message' => 'Please enter a valid email',
				'last' => true
			) ,
			'mustUnique' => array(
				'rule' => 'isUnique',
				'message' => 'This email is already exists.',
			)
		) ,
	);
}

?>

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In this tutorial we will guide you how to Install CakePHP 3 Using Composer step by step. CakePHP uses Composer, a dependency management tool, as the officially supported method for installation. Through Composer it’s simple and easy to install CakePHP.

Install CakePHP 3 Using Composer

#1. Requirements

Before Install CakePHP 3 make sure following requirements are enabled and installed on your machine:

1) You must have PHP 5.5.9 or greater.
2) mbstring extension and intl extension must be enabled. Make sure these lines are enable by removing the semicolon (;) from the start in php.ini file.

extension=php_intl.dll
extension=php_mbstring.dll

#2. Install Composer

The next thing you need to do Install Composer On Windows With XAMPP. This process will take another 5-10 minutes. Below is the step by step tutorial:

How to Install Composer On Windows With XAMPP

Once you successfully installed the Composer, then type composer and press enter in the terminal you will get following response like in the below image.

Go to htdocs directory on your XAMPP server to Install CakePHP 3

Now Run the following command to install CakePhp 3 using Composer on your server in cakeapp folder in this C:\xampp\htdocs\cakeapp\ path.

composer create-project --prefer-dist cakephp/app cakeapp

Once CakePhp 3 installation start then you will get following response like in the below image.

Once you successfully installed CakePhp 3 on your machine then you will get following response like in the below image.

Finally it will ask you to set Folder Permission, so press Y to continue.

#3. Configuration Database

Configuration database details in config/app.php file.

'Datasources' => [
        'default' => [
            'className' => 'Cake\Database\Connection',
            'driver' => 'Cake\Database\Driver\Mysql',
            'persistent' => false,
            'host' => 'localhost',
            'username' => 'root',
            'password' => '',
            'database' => 'cakeapp',
            'encoding' => 'utf8',
            'timezone' => 'UTC',
            'flags' => [],
            'cacheMetadata' => true,
            'log' => false,
            'quoteIdentifiers' => false,
            'url' => env('DATABASE_URL', null),
        ],
    ]

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