MaxLineLength.php

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<?php

class Robo47_Validate_MaxLineLength extends Zend_Validate_Abstract
{
    const LINE_TOO_LONG = 'lineToLong';
    
    protected $_messageTemplates = array(
        self::LINE_TOO_LONG => "Line %value% is too long"
    );
    protected $_lineLength = 80;
    protected $_encoding = 'utf-8';

    public function __construct($lineLength = 80, $encoding = 'utf-8')
    {
        $this->setLineLength($lineLength);
        $this->setEncoding($encoding);
    }

    public function setEncoding($encoding)
    {
        $this->_encoding = $encoding;
        return $this;
    }

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

    public function setLineLength($lineLength)
    {
        $lineLength = (int) $lineLength;
        if ($lineLength < 1) {
            $message = 'lineLength is less than 1';
            throw new Robo47_Validate_Exception($message);
        } else {
            $this->_lineLength = $lineLength;
        }
        return $this;
    }

    public function getLineLength()
    {
        return $this->_lineLength;
    }

    public function isValid($value)
    {
        // replace other line-endings
        $value = str_replace("\n\r", "\n", $value);
        $value = str_replace("\r\n", "\n", $value);
        // create array
        $asArray = explode("\n", $value);

        foreach ($asArray as $linenumber => $line) {
            if (mb_strwidth($line, $this->_encoding) > $this->_lineLength) {
                $this->_error(self::LINE_TOO_LONG, $linenumber + 1);
                return false;
            }
        }
        return true;
    }
}