linequest/controller/validator.php

<?php

class  Validator {
	static $errors = true;

	static function check($arr, $on = false) {
		if ($on === false) {
			$on = $_REQUEST;
		}
		foreach ($arr as $value) {
			if (empty($on[$value])) {
				self::throwError('Data is missing', 900);
			}
		}
	}

	static function int($val) {
		$val = filter_var($val, FILTER_VALIDATE_INT);
		if ($val === false) {
			self::throwError('Invalid Integer', 901);
		}
		return $val;
	}

	static function str($val, $empty=false) {
		if (!is_string($val)) {
			self::throwError('Invalid String', 902);
		}
		$val = trim(htmlspecialchars($val));
		if(strlen($val) === 0 && !$empty) self::throwError('Empty String', 907);
		return $val;
	}

	static function bool($val) {
		$val = filter_var($val, FILTER_VALIDATE_BOOLEAN);
		return $val;
	}

	static function email($val) {
		$val = filter_var($val, FILTER_VALIDATE_EMAIL);
		if ($val === false) {
			self::throwError('Invalid Email', 903);
		}
		return $val;
	}

	static function url($val) {
		$val = filter_var($val, FILTER_VALIDATE_URL);
		if ($val === false) {
			self::throwError('Invalid URL', 904);
		}
		return $val;
	}

	static function file($val, $ext = false) {
		if (($val['error'] !== UPLOAD_ERR_OK) || !is_uploaded_file($val['tmp_name'])) {
			self::throwError('File upload error',905);
		}
		if ($ext) {
			$fileName = $val['name'];
			// $fileSize = $val['size'];
			$fileNameCmps = explode(".", $fileName);
			$fileExtension = strtolower(end($fileNameCmps));
			if (strcmp($ext, $fileExtension) !== 0) {
				self::throwError('Invalid file extension',906);
			}
		}
		return $val;
	}

	static function throwError($error = 'Error In Processing', $errorCode = 0) {
		if (self::$errors === true) {
			throw new Exception($error, $errorCode);
		}
	}
}