C:/xampp/htdocs/moodle/lib/zend/Zend/Validate/NotEmpty.php

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<?php
require_once 'Zend/Validate/Abstract.php';

class Zend_Validate_NotEmpty extends Zend_Validate_Abstract
{
    const BOOLEAN      = 1;
    const INTEGER      = 2;
    const FLOAT        = 4;
    const STRING       = 8;
    const ZERO         = 16;
    const EMPTY_ARRAY  = 32;
    const NULL         = 64;
    const PHP          = 127;
    const SPACE        = 128;
    const ALL          = 255;

    const INVALID  = 'notEmptyInvalid';
    const IS_EMPTY = 'isEmpty';

    protected $_constants = array(
        self::BOOLEAN      => 'boolean',
        self::INTEGER      => 'integer',
        self::FLOAT        => 'float',
        self::STRING       => 'string',
        self::ZERO         => 'zero',
        self::EMPTY_ARRAY  => 'array',
        self::NULL         => 'null',
        self::PHP          => 'php',
        self::SPACE        => 'space',
        self::ALL          => 'all'
    );

    protected $_messageTemplates = array(
        self::IS_EMPTY => "Value is required and can't be empty",
        self::INVALID  => "Invalid type given, value should be float, string, array, boolean or integer",
    );

    protected $_type = 237;

    public function __construct($options = null)
    {
        if ($options instanceof Zend_Config) {
            $options = $options->toArray();
        } else if (!is_array($options)) {
            $options = func_get_args();
            $temp    = array();
            if (!empty($options)) {
                $temp['type'] = array_shift($options);
            }

            $options = $temp;
        }

        if (is_array($options) && array_key_exists('type', $options)) {
            $this->setType($options['type']);
        }
    }

    public function getType()
    {
        return $this->_type;
    }

    public function setType($type = null)
    {
        if (is_array($type)) {
            $detected = 0;
            foreach($type as $value) {
                if (is_int($value)) {
                    $detected += $value;
                } else if (in_array($value, $this->_constants)) {
                    $detected += array_search($value, $this->_constants);
                }
            }

            $type = $detected;
        } else if (is_string($type) && in_array($type, $this->_constants)) {
            $type = array_search($type, $this->_constants);
        }

        if (!is_int($type) || ($type < 0) || ($type > self::ALL)) {
            require_once 'Zend/Validate/Exception.php';
            throw new Zend_Validate_Exception('Unknown type');
        }

        $this->_type = $type;
        return $this;
    }

    public function isValid($value)
    {
        if (!is_null($value) && !is_string($value) && !is_int($value) && !is_float($value) &&
            !is_bool($value) && !is_array($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $type    = $this->getType();
        $this->_setValue($value);

        // SPACE ('   ')
        if ($type >= self::SPACE) {
            $type -= self::SPACE;
            if (is_string($value) && (preg_match('/^\s+$/s', $value))) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        // NULL (null)
        if ($type >= self::NULL) {
            $type -= self::NULL;
            if (is_null($value)) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        // EMPTY_ARRAY (array())
        if ($type >= self::EMPTY_ARRAY) {
            $type -= self::EMPTY_ARRAY;
            if (is_array($value) && ($value == array())) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        // ZERO ('0')
        if ($type >= self::ZERO) {
            $type -= self::ZERO;
            if (is_string($value) && ($value == '0')) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        // STRING ('')
        if ($type >= self::STRING) {
            $type -= self::STRING;
            if (is_string($value) && ($value == '')) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        // FLOAT (0.0)
        if ($type >= self::FLOAT) {
            $type -= self::FLOAT;
            if (is_float($value) && ($value == 0.0)) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        // INTEGER (0)
        if ($type >= self::INTEGER) {
            $type -= self::INTEGER;
            if (is_int($value) && ($value == 0)) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        // BOOLEAN (false)
        if ($type >= self::BOOLEAN) {
            $type -= self::BOOLEAN;
            if (is_bool($value) && ($value == false)) {
                $this->_error(self::IS_EMPTY);
                return false;
            }
        }

        return true;
    }
}