/ePHP/libraries/Image.class.php

<?php
 /**
 +------------------------------------------------------------------------------
 * ?????????
 * <code>
 * ???????
 * ?view??????<img src="/?c=reg&a=code" onclick="this.src='/?c=reg&a=code'" />
 *
 * //?????
 * public function registerAction()
 * {
 *     echo Image::chkVerify() ? '?????' : '?????';
 * }
 * public funciton codeAction()
 * {
 *     Image::imgVerify();
 * }
 *
 * //???????
 * print_r(Image::getInfo('/home/a.jpg'));
 *
 * //??gd?????
 * Image::thumbImg('a.jpg','a-thumb.jpg',100,120);//?? a.jpg ????,??:100 ??:120
 *
 * </code>
 +------------------------------------------------------------------------------
 * @version 3.0
 * @author WangXian
 * @email admin@loopx.cn
 * @package  libraries
 * @creation_date 2010-10-17
 * @last_modified 2010-12-25 19:14:58
 +------------------------------------------------------------------------------
 */

class Image
{
    /**
     * ???????
     * @param $imgFile ?????
     * @return array
     */
    static public function getInfo($imgFile)
    {
        $imageInfo = getimagesize($imgFile);
        if( $imageInfo!== false)
        {
            $imageType = strtolower(substr(image_type_to_extension($imageInfo[2]),1));
            $imageSize = filesize($imgFile);
            $info = array(
                "width"=>$imageInfo[0],
                "height"=>$imageInfo[1],
                "type"=>$imageType,
                "size"=>$imageSize,
                "mime"=>$imageInfo['mime']
            );
            return $info;
        }
        else return false;
    }

     /**
      * ?????
      * ??????????????????????????JPG
      * @param $srcfile:????
      * @param $dstfile:?????????
      * @param $thumbWidth:???????
      * @param $thumbHeight:???????
      */
     static public function thumbImg($srcfile,$dstfile,$thumbWidth,$thumbHeight)
     {
        //?????
        $tow = $thumbWidth;
        $toh = $thumbHeight;

        $make_max = 0;
        $maxtow = $thumbWidth;
        $maxtoh = $thumbHeight;
        if($maxtow >= 300 && $maxtoh >= 300)
        {
            $make_max = 1;
        }

        //??????
        $im = '';
        if(true == ($data = getimagesize($srcfile)) )
        {
            if($data[2] == 1)
            {
                $make_max = 0;//gif???
                if(function_exists("imagecreatefromgif"))
                    $im = imagecreatefromgif($srcfile);
            }
            elseif($data[2] == 2)
            {
                if(function_exists("imagecreatefromjpeg"))
                    $im = imagecreatefromjpeg($srcfile);
            }
            elseif($data[2] == 3)
            {
                if(function_exists("imagecreatefrompng"))
                    $im = imagecreatefrompng($srcfile);
            }
        }
        if(!$im) return '';

        $srcw = imagesx($im);
        $srch = imagesy($im);

        $towh = $tow/$toh;
        $srcwh = $srcw/$srch;
        if($towh <= $srcwh)
        {
            $ftow = $tow;
            $ftoh = $ftow*($srch/$srcw);

            $fmaxtow = $maxtow;
            $fmaxtoh = $fmaxtow*($srch/$srcw);
        }
        else
        {
            $ftoh = $toh;
            $ftow = $ftoh*($srcw/$srch);

            $fmaxtoh = $maxtoh;
            $fmaxtow = $fmaxtoh*($srcw/$srch);
        }

        if($srcw <= $maxtow && $srch <= $maxtoh)
        {
            $make_max = 0;//???
        }

        if($srcw > $tow || $srch > $toh)
        {
            if(function_exists("imagecreatetruecolor") && function_exists("imagecopyresampled") && @$ni = imagecreatetruecolor($ftow, $ftoh))
            {
                imagecopyresampled($ni, $im, 0, 0, 0, 0, $ftow, $ftoh, $srcw, $srch);
                //???
                if($make_max && @$maxni = imagecreatetruecolor($fmaxtow, $fmaxtoh))
                {
                    imagecopyresampled($maxni, $im, 0, 0, 0, 0, $fmaxtow, $fmaxtoh, $srcw, $srch);
                }
            }
            elseif(function_exists("imagecreate") && function_exists("imagecopyresized") && @$ni = imagecreate($ftow, $ftoh))
            {
                imagecopyresized($ni, $im, 0, 0, 0, 0, $ftow, $ftoh, $srcw, $srch);
                //???
                if($make_max && @$maxni = imagecreate($fmaxtow, $fmaxtoh))
                {
                    imagecopyresized($maxni, $im, 0, 0, 0, 0, $fmaxtow, $fmaxtoh, $srcw, $srch);
                }
            }
            else return '';

            if(function_exists('imagejpeg'))
            {
                imagejpeg($ni, $dstfile);
                //???
                if($make_max) imagejpeg($maxni, $srcfile);
            }
            elseif(function_exists('imagepng'))
            {
                imagepng($ni, $dstfile);
                //???
                if($make_max) imagepng($maxni, $srcfile);
            }
            imagedestroy($ni);
            if($make_max) imagedestroy($maxni);
        }
        imagedestroy($im);
        return file_exists($dstfile);
     }

     /**
      * ???
	  * ????,50x24
      *
      * @param integer $length :?????
      * @param integer $mode  : 0??????1???2?????3????,5???+??
      * @param string $type :????
	  * @param boolean $hasborder :??????
      * @return binary
      */
    static public function imgVerify($length=4,$mode=3,$type='png',$hasborder=true)
    {
        $randval = Func::randString($length,$mode);
        $_SESSION['imgVerifyCode']=md5(strtolower($randval));
        //dump($_SESSION);exit;

		$width=50;
		$height=24;

        $width = ($length*9+10)>$width ? $length*9+10 : $width;
        if ( $type!='gif' && function_exists('imagecreatetruecolor'))
            $im = @imagecreatetruecolor($width,$height);
        else $im = @imagecreate($width,$height);

        //$r = array(225,255,255,223);
        //$g = array(225,236,237,255);
        //$b = array(225,236,166,125);
        //$key = mt_rand(0,3);
        //$backColor = imagecolorallocate($im, $r[$key],$g[$key],$b[$key]);
		$backColor = imagecolorallocate($im, 252,252,252);		//???

		if($hasborder) $border_color = 238;
		else $border_color = 255;
		$borderColor = imagecolorallocate($im, $border_color,$border_color,$border_color);	//???
        $pointColor = imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));                 //???

        @imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
        @imagerectangle($im, 0, 0, $width-1, $height-1, $borderColor);
        $stringColor = imagecolorallocate($im,mt_rand(0,200),mt_rand(0,120),mt_rand(0,120));

        // ??
		for($i=0;$i<10;$i++)
		{
			$fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
			imagearc($im,mt_rand(-10,$width),mt_rand(-10,$height),mt_rand(30,300),mt_rand(20,200),55,44,$fontcolor);
		}

		for($i=0;$i<25;$i++)
		{
			$fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
			imagesetpixel($im,mt_rand(0,$width),mt_rand(0,$height),$pointColor);
		}

        @imagestring($im, 5, 5, 3, $randval, $stringColor);

        header("Content-type: image/".$type);
        $ImageFun='Image'.$type;
        $ImageFun($im);
        imagedestroy($im);
    }

    /**
     * ????????????
     * @param $verifyCode ????????
     * @return boolean
     */
    static public function chkVerify($verifyCode)
    {
    	if(empty($_SESSION['imgVerifyCode'])) return false;
        return $_SESSION['imgVerifyCode'] == md5(strtolower($verifyCode));
    }

}
/* End of file Image.class.php */
/* Location: ./_framework/libraries/Image.class.php */