class.ilSecurImage.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Services/Captcha/classes/class.ilSecurImageUtil.php';

class ilSecurImage
{
    protected $lng;

    const MAX_CAPTCHA_IMG_WIDTH = 430;

    const MAX_CAPTCHA_IMG_HEIGHT = 160;

    protected $image_width = 0;

    protected $image_height = 0;

    protected $securimage;

    protected static $supported_audio_languages = array(
        'fr', 'de'
    );

    public function __construct()
    {
        global $DIC;

        $this->lng = $DIC->language();
        ilSecurImageUtil::includeSecurImage();
        $this->securimage = new Securimage();
        if (!function_exists("imagettftext")) {
            $this->securimage->use_gd_font = true;
        }

        $this->securimage->num_lines = 3;
    }

    public function getSecureImageObject()
    {
        return $this->securimage;
    }

    public function check($a_input)
    {
        return $this->securimage->check($a_input);
    }

    public function showImage()
    {
        chdir(ilSecurImageUtil::getDirectory());
        $this->securimage->show();
    }

    public function outputAudioFile()
    {
        $lng = $this->lng;
        
        chdir(ilSecurImageUtil::getDirectory());
        if (
            $lng->lang_key != 'en' &&
            in_array($lng->lang_key, self::$supported_audio_languages)
        ) {
            $this->securimage->audio_path = $this->securimage->securimage_path . '/audio/' . $lng->lang_key . '/';
        }
        $this->securimage->outputAudioFile();
    }

    public function setImageHeight($image_height)
    {
        if (!is_numeric($image_height) || $image_height > self::MAX_CAPTCHA_IMG_HEIGHT) {
            throw new InvalidArgumentException('Please provide a valid image height (numeric value > 0 and <= ' . self::MAX_CAPTCHA_IMG_HEIGHT);
        }
        $this->image_height = $image_height;
    }

    public function getImageHeight()
    {
        return $this->image_height;
    }

    public function setImageWidth($image_width)
    {
        if (!is_numeric($image_width) || $image_width > self::MAX_CAPTCHA_IMG_WIDTH) {
            throw new InvalidArgumentException('Please provide a valid image width (numeric value > 0 and <= ' . self::MAX_CAPTCHA_IMG_WIDTH);
        }
        $this->image_width = $image_width;
    }

    public function getImageWidth()
    {
        return $this->image_width;
    }
}