PHP form validator
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README.md
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README.md

Bouncer's Book

Bouncer's Book is a PHP form validator.

Documentation

This README is currently the only documentation.

Requirements

PHP 5.3 or higher and Composer. The tests require Corn Wand.

Source Code

The project is on GitHub. The source code is one class.

Tests

All the tests are in the test directory. Each PHP script in the top level test directory is a separate test. You need to run composer install in the test directory before running any of the tests. Tests 1-3 test the first, second and third constructor parameters respectively. Test 4 tests the more() method.

Installation

Install using composer:

{
    "require": {
        "bouncers-book/bouncers-book": "0.5.0",
    }
}

Basic Usage

Set up a form validator class:

namespace silver\validator;

class Validator1 extends \bbook\FormValidator {
    public function __construct() {

        //list all the form inputs
        parent::__construct(array(
            'input1',
            'input2'));
    }

    //validate form inputs with validate_ methods
    //return null if valid
    protected function validate_input1($value) {
        if(!preg_match('/^[a-z0-9]{1,10}$/i', $value)) {
            return 'Input 1 must be 1-10 characters; letters and numbers only';
        }
    }

    //validate method for input2
    protected function validate_input2($value) {
        if(strlen($value) < 6) {
            return 'Input 2 must be 6 or more characters';
        }
    }
}

Validate $_POST with validate():

require 'vendor/autoload.php';

$validator = new silver\validator\Validator1();

if(list($input_values, $errors) = $validator->validate()) {
    $content = $errors

        //re-display form if there is an error
        ? form1($input_values, $errors)

        //no errors, process form data
        : c\pre(print_r($input_values, true));
}
else {

    //form not submitted, first time user arrives at website
    $content = form1($validator->values());
    $autofocus = c\focus('input1');
}

include 'src/silver/html/template.php';

Optional Inputs

Use the second constructor parameter to specify which submitted inputs are optional:

namespace silver\validator;

class Validator2 extends \bbook\FormValidator {
    public function __construct() {
        parent::__construct(

            //list form inputs and default values
            array(
                'input1',
                'pizzas' => array()),

            //list optional inputs, pizzas is checkboxes
            array('pizzas'));
    }

    protected function validate_input1($value) {
        if(!preg_match('/^[a-z0-9]{1,10}$/i', $value)) {
            return 'Input 1 must be 1-10 characters; letters and numbers only';
        }
    }

    protected function validate_pizzas($value) {
        if(count($value) != 2) {
            return 'Choose 2 types of pizza';
        }
    }
}

Validate Any Data

Use the third constructor parameter to specify the data to validate:

namespace silver\validator;

class Validator3 extends \bbook\FormValidator {
    public function __construct() {
        parent::__construct(

            //list form inputs
            array(
                'input1',
                'input2'),

            //which are optional? none
            array(),

            //validate this data instead of $_POST
            array(
                'input1' => 'Fred?',
                'input2' => '123456'));
    }

    protected function validate_input1($value) {
        if(!preg_match('/^[a-z0-9]{1,10}$/i', $value)) {
            return 'Input 1 must be 1-10 characters; letters and numbers only';
        }
    }

    protected function validate_input2($value) {
        if(strlen($value) < 6) {
            return 'Input 2 must be 6 or more characters';
        }
    }
}

Validate More

Use more() to validate more than one value at a time:

namespace silver\validator;

class Validator4 extends \bbook\FormValidator {
    public function __construct() {
        parent::__construct(array(
            'input1',
            'input2'));
    }

    protected function validate_input1($value) {
        if(trim($value) == '') {
            return 'Please enter a value for Input 1';
        }
    }

    protected function validate_input2($value) {
        if(trim($value) == '') {
            return 'Please enter a value for Input 2';
        }
    }

    protected function more($values) {
        if(trim($values['input1']) != '' &&
            trim($values['input2']) != '' &&
            $values['input1'] != $values['input2'])
        {
            return 'Input 1 and Input 2 must be the same';
        }
    }
}

LICENSE

MIT http://ryf.mit-license.org/