StringLength.php

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

class Zend_Validate_StringLength extends Zend_Validate_Abstract
{
    const INVALID   = 'stringLengthInvalid';
    const TOO_SHORT = 'stringLengthTooShort';
    const TOO_LONG  = 'stringLengthTooLong';

    protected $_messageTemplates = array(
        self::INVALID   => "Invalid type given. String expected",
        self::TOO_SHORT => "'%value%' is less than %min% characters long",
        self::TOO_LONG  => "'%value%' is more than %max% characters long",
    );

    protected $_messageVariables = array(
        'min' => '_min',
        'max' => '_max'
    );

    protected $_min;

    protected $_max;

    protected $_encoding;

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

            if (!empty($options)) {
                $temp['encoding'] = array_shift($options);
            }

            $options = $temp;
        }

        if (!array_key_exists('min', $options)) {
            $options['min'] = 0;
        }

        $this->setMin($options['min']);
        if (array_key_exists('max', $options)) {
            $this->setMax($options['max']);
        }

        if (array_key_exists('encoding', $options)) {
            $this->setEncoding($options['encoding']);
        }
    }

    public function getMin()
    {
        return $this->_min;
    }

    public function setMin($min)
    {
        if (null !== $this->_max && $min > $this->_max) {
            #require_once 'Zend/Validate/Exception.php';
            throw new Zend_Validate_Exception("The minimum must be less than or equal to the maximum length, but $min >"
                                            . " $this->_max");
        }
        $this->_min = max(0, (integer) $min);
        return $this;
    }

    public function getMax()
    {
        return $this->_max;
    }

    public function setMax($max)
    {
        if (null === $max) {
            $this->_max = null;
        } else if ($max < $this->_min) {
            #require_once 'Zend/Validate/Exception.php';
            throw new Zend_Validate_Exception("The maximum must be greater than or equal to the minimum length, but "
                                            . "$max < $this->_min");
        } else {
            $this->_max = (integer) $max;
        }

        return $this;
    }

    public function getEncoding()
    {
        return $this->_encoding;
    }

    public function setEncoding($encoding = null)
    {
        if ($encoding !== null) {
            $orig = PHP_VERSION_ID < 50600
                        ? iconv_get_encoding('internal_encoding')
                        : ini_get('default_charset');
            if (PHP_VERSION_ID < 50600) {
                if ($encoding) {
                    $result = iconv_set_encoding('internal_encoding', $encoding);
                } else {
                    $result = false;
                }
            } else {
                ini_set('default_charset', $encoding);
                $result = ini_get('default_charset');
            }
            if ($result === false) {
                #require_once 'Zend/Validate/Exception.php';
                throw new Zend_Validate_Exception('Given encoding not supported on this OS!');
            }

            if (PHP_VERSION_ID < 50600) {
                iconv_set_encoding('internal_encoding', $orig);
            } else {
                ini_set('default_charset', $orig);
            }
        }
        $this->_encoding = $encoding;
        return $this;
    }

    public function isValid($value)
    {
        if (!is_string($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue($value);
        if ($this->_encoding !== null) {
            $length = iconv_strlen($value, $this->_encoding);
        } else {
            $length = iconv_strlen($value);
        }

        if ($length < $this->_min) {
            $this->_error(self::TOO_SHORT);
        }

        if (null !== $this->_max && $this->_max < $length) {
            $this->_error(self::TOO_LONG);
        }

        if (count($this->_messages)) {
            return false;
        } else {
            return true;
        }
    }
}