PHP Validator

The validator class is used to setup validation rules for expected values on the server concerning data coming from the user. Validating data is crucial before working with it.

Usage

Create an instance of the Validator class with an associative array as first and only parameter.

// Using the $_POST global
$Validator = new Validator($_POST);

// or some other array:
$Validator = new Validator([
    "email"     => $email,
    "password"  => $password
]);

Then you simply specify what values you expect by setting some rules.

//$Validator->Expect(var, rule);
$Validator->Expect("email", "required, email");
$Validator->Expect("password", "required");

To check if the values passed the validation you simply call: Validate() which returns a boolean.

if ($Validator->Validate()) {
    // Validation ok
} else {
    // Validation failed
}

Rules

The available rules are:

• req/required - specify that a variable must be set.
• num/numeric - validate using is_numeric()
• min/minimum - minimum value for an numeric value.
• max/maximum - maximum value for an numeric value.
• min_length - minimum length for a string
• max_length - maximum length for a string
• email - validate using filter_var($var, FILTER_VALIDATE_EMAIL)

To set values for the min/max rules use the format "rule=value" like "min=5, max=15". A comma is used to separate each value.