Validation.php

<?php

class Validation
{

    /*  CHECK IF A $STRING IS INT. */
    public static function isNumeric($string){
	    if (!filter_var($string, FILTER_VALIDATE_INT)) 
            return false;
        else
            return true;
    }

    /*  CHECK IF A $STRING IS FLOAT. */
    public static function isFloat($string){
	    if (!filter_var($string, FILTER_VALIDATE_FLOAT)) 
            return false;
        else
            return true;
    }

    /*  CHECK IF A $STRING IS BOOLEAN. */
    public static function isBoolean($string){
	    if (!filter_var($string, FILTER_VALIDATE_BOOLEAN)) 
            return false;
        else
            return true;
    }

    /* CHECK IF A VALID IP */
    public static function isValidIP($string) {
        if (!filter_var($string, FILTER_VALIDATE_IP)) 
            return false;
        else
            return true;
    }

    /*  CHECK IF A VALID URL */
    public static function isValidUrl($string) {
        if (!filter_var($string, FILTER_VALIDATE_URL)) 
            return false;
        else
            return true;
    }

    /*  CHECK IF A VALID EMAIL */
    public static function isValidEmail($string) {
        if (!filter_var($string, FILTER_VALIDATE_EMAIL)) 
            return false;
        else
            return true;
    }

    /*  CHECK IF A $STRING IS EQUAL TO OTHER */
    public static function isEqual($string1, $string2){
        if ($string2 != $string1)
            return false;
        else
            return true;
    }

    /*  CHECK IF A $STRING IS VALIDATE NAMES WITHOUT NUMBERS BUT WITH ~, ^. */
    public static function isValidName($string){
        if (!preg_match('/^[A-ZÀ-Ÿ][A-zÀ-ÿ\'.]+\s([A-zÀ-ÿ\'.]\s?)*[A-ZÀ-Ÿ.][A-zÀ-ÿ\'.]+$/', $string))
            return false;
        else
            return true;
    }

    /*  CHECK IF A $STRING IS CPF OF CPNJ WITH OR WITHOUT PONTUATION */
    public static function isValidCPForCNPJ($string){
        if (!preg_match('/^([0-9]{3}\.?[0-9]{3}\.?[0-9]{3}\-?[0-9]{2}|[0-9]{2}\.?[0-9]{3}\.?[0-9]{3}\/?[0-9]{4}\-?[0-9]{2})$/', $string))
            return false;
        else
            return true;
    }

    /*  CHECK IF A $STRING IS CPF OF CPNJ WITH OR WITHOUT PONTUATION */
    public static function isValidChave($string){
      if (!preg_match('/^([0-9]{4}\-[0-9]{4}\-[0-9]{4}\-[0-9]{4})$/', $string))
        return false;
      else
        return true;
    }

    /*  CHECK IF A $STRING IS A DATE 2020-11-03 */
    public static function isDateStd($string){
        if (!preg_match('/^([0-9]{4}-[0-9]{2}-[0-9]{2})$/', $string))
          return false;
        else
          return true;
    }

    /*  CHECK IF A $STRING IS A DATE 03/06/1989 */
    public static function isDate($string){
        if (!preg_match('/^([0-9]{2}\/[0-9]{2}\/[0-9]{4})$/', $string))
          return false;
        else
          return true;
    }

    public static function isCPForCNPJ($string){
        $string = preg_replace('/[^0-9]/', '', $valor);
        if (strlen($string) == 11)
        {
            $result->cpf = $valor;
        }
        elseif (strlen($string) == 14)
        {
            $result->cnpj = $valor;
        }
    }

}