PHP ImagePNG函数代码示例

 function extractAppInfo($img)
 {
     //アイコン切り出し
     $homeLeftPadding = 34;
     $homeTopPadding = 67;
     $appSideMargin = 38;
     //1列目と2列め、3列めと4列目の間のマージン
     $appCenterMargin = 40;
     //2列めと3列めの間のマージン
     $appBottomMargin = 62;
     $featurePadding = 6;
     //角丸分を削る
     for ($y = 0; $y < 4; $y++) {
         for ($x = 0; $x < 4; $x++) {
             //アイコン切り出し
             $appXAlpha = $x < 2 ? 0 : $appCenterMargin - $appSideMargin;
             $appX = $homeLeftPadding + ($x * (self::appWidth + $appSideMargin) + $appXAlpha);
             $appY = $homeTopPadding + $y * (self::appHeight + $appBottomMargin);
             $appImg = ImageCreateTrueColor(self::appWidth - $featurePadding * 2, self::appHeight - $featurePadding * 2);
             ImageCopyResampled($appImg, $img, 0, 0, $appX + $featurePadding, $appY + $featurePadding, self::appWidth - $featurePadding * 2, self::appHeight - $featurePadding * 2, self::appWidth - $featurePadding * 2, self::appHeight - $featurePadding * 2);
             $appIdx = $y * 4 + $x;
             $filename = "app_icon.{$appIdx}.png";
             ImagePNG($appImg, $filename);
             echo "{$filename} \n";
             //アイコンを3x3に分割して平均色を抽出、特徴量とする
             //$features = $this->calcIconImgFeature($appImg);
             ImageDestroy($appImg);
         }
     }
 }

function create_captcha($width = 60, $height = 32)
{
    session_start();
    //生成验证码图片
    Header("Content-type: image/PNG");
    $im = imagecreate($width, $height);
    // width and height of image
    $back = ImageColorAllocate($im, 245, 245, 245);
    // specify background color
    imagefill($im, 0, 0, $back);
    // fill the background color into image
    $vcodes = "";
    srand((double) microtime() * 1000000);
    //生成4位数字
    for ($i = 0; $i < 4; $i++) {
        $font = ImageColorAllocate($im, rand(100, 255), rand(0, 100), rand(100, 255));
        // 生成随机颜色
        $authnum = rand(1, 9);
        $vcodes .= $authnum;
        imagestring($im, 5, 2 + $i * 10, 1, $authnum, $font);
    }
    for ($i = 0; $i < 100; $i++) {
        // interuppting
        $randcolor = ImageColorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
        imagesetpixel($im, rand() % 70, rand() % 30, $randcolor);
        // 画像素点函数
    }
    ImagePNG($im);
    ImageDestroy($im);
    $_SESSION['captcha'] = $vcodes;
}

 function create_error($text)
 {
     $text = $text;
     $size = "8";
     $font = "classes/fonts/trebuchet.ttf";
     $TextBoxSize = imagettfbbox($size, 0, $font, preg_replace("/\\[br\\]/is", "\r\n", $text));
     $TxtBx_Lwr_L_x = $TextBoxSize[0];
     $TxtBx_Lwr_L_y = $TextBoxSize[1];
     $TxtBx_Lwr_R_x = $TextBoxSize[2];
     $TxtBx_Lwr_R_y = $TextBoxSize[3];
     $TxtBx_Upr_R_x = $TextBoxSize[4];
     $TxtBx_Upr_R_y = $TextBoxSize[5];
     $TxtBx_Upr_L_x = $TextBoxSize[6];
     $TxtBx_Upr_L_y = $TextBoxSize[7];
     $width = max($TxtBx_Lwr_R_x, $TxtBx_Upr_R_x) - min($TxtBx_Lwr_L_x, $TxtBx_Upr_L_x);
     $height = max($TxtBx_Lwr_L_y, $TxtBx_Lwr_R_y) - min($TxtBx_Upr_R_y, $TxtBx_Upr_L_y);
     $x = -min($TxtBx_Upr_L_x, $TxtBx_Lwr_L_x);
     $y = -min($TxtBx_Upr_R_y, $TxtBx_Upr_L_y);
     $img = imagecreate($width + 2, $height + 1);
     // Only PHP-Version 4.3.2 or higher
     if (function_exists('imageantialias')) {
         imageantialias($img, FALSE);
     }
     $white = imagecolorallocate($img, 255, 255, 255);
     $black = imagecolorallocate($img, 0, 0, 0);
     imagecolortransparent($img, $white);
     ImageTTFText($img, $size, 0, $x, $y, $black, $font, preg_replace("/<br>/is", "\r\n", $text));
     header("Content-Type: image/png");
     ImagePNG($img);
     ImageDestroy($img);
     exit;
 }

 public function show()
 {
     $size = min($this->im_y, $this->im_x / $this->text_num);
     $size = ceil($size * 0.8);
     $im = imagecreatetruecolor($this->im_x, $this->im_y);
     $text_c = imagecolorallocate($im, 255, 0, 0);
     $bg_c = imagecolorallocate($im, 255, 255, 255);
     imagefill($im, 0, 0, $bg_c);
     for ($i = 0; $i < $this->text_num; $i++) {
         $ypos = $size * 1.2;
         if (preg_match('/[ygJup]/', $this->text[$i])) {
             $ypos = ceil($ypos * 0.8);
         }
         //反色
         $rnd = rand(1, $this->text_num - 1);
         if ($i % $this->text_num == $rnd) {
             imagefilledellipse($im, $this->im_x * 0.05 + $i * $size * 1.3 + $size / 2, $ypos / 2, $size * 1.2, $this->im_y * 1.1, $text_c);
             imagettftext($im, $size, 0, $this->im_x * 0.05 + $i * $size * 1.3, $ypos, $bg_c, $this->ttf_file, $this->text[$i]);
         } else {
             imagettftext($im, $size, rand(-20, 20), $this->im_x * 0.05 + $i * $size * 1.3, $ypos, $text_c, $this->ttf_file, $this->text[$i]);
         }
     }
     ob_clean();
     header("Content-type: image/png");
     ImagePNG($im);
     ImageDestroy($im);
     echo '= ' . base64_encode('@author:miaokuan<eyou80@gmail.com>');
 }

function ConvertToImage($content)
{
    $imageFile = ".counter.png";
    $relativePath = ".counter.png";
    $noOfChars = strlen($content);
    $charHeight = ImageFontHeight(5);
    $charWidth = ImageFontWidth(5);
    $strWidth = $charWidth * $noOfChars;
    $strHeight = $charHeight;
    //15 padding
    $imgWidth = $strWidth + 15;
    $imgHeight = $strHeight + 15;
    $imgCenterX = $imgWidth / 2;
    $imgCenterY = $imgHeight / 2;
    $im = ImageCreate($imgWidth, $imgHeight);
    $script = ImageColorAllocate($im, 0, 255, 0);
    $outercolor = ImageColorAllocate($im, 99, 140, 214);
    $innercolor = ImageColorAllocate($im, 0, 0, 0);
    ImageFilledRectangle($im, 0, 0, $imgWidth, $imgHeight, $outercolor);
    ImageFilledRectangle($im, 3, 3, $imgWidth - 4, $imgHeight - 4, $innercolor);
    //draw string
    $drawPosX = $imgCenterX - $strWidth / 2 + 1;
    $drawPosY = $imgCenterY - $strHeight / 2;
    ImageString($im, 5, $drawPosX, $drawPosY, $content, $script);
    //save image and return
    ImagePNG($im, $imageFile);
    return $relativePath;
}

 function SaveImage($im, $filename)
 {
     $res = null;
     // ImageGIF is not included into some GD2 releases, so it might not work
     // output png if gifs are not supported
     if ($this->image_type == 1 && !function_exists('imagegif')) {
         $this->image_type = 3;
     }
     switch ($this->image_type) {
         case 1:
             if ($this->save_to_file) {
                 header("Content-type: image/gif");
                 $res = ImageGIF($im, $filename);
                 $res = ImageGIF($im, NULL);
             } else {
                 header("Content-type: image/gif");
                 $res = ImageGIF($im, $filename);
                 $res = ImageGIF($im, NULL);
             }
             break;
         case 2:
             if ($this->save_to_file) {
                 header("Content-type: image/jpeg");
                 $res = ImageJPEG($im, $filename, $this->quality);
                 $res = ImageJPEG($im, NULL, $this->quality);
             } else {
                 header("Content-type: image/jpeg");
                 $res = ImageJPEG($im, $filename, $this->quality);
                 $res = ImageJPEG($im, NULL, $this->quality);
             }
             break;
         case 3:
             if (PHP_VERSION >= '5.1.2') {
                 // Convert to PNG quality.
                 // PNG quality: 0 (best quality, bigger file) to 9 (worst quality, smaller file)
                 $quality = 9 - min(round($this->quality / 10), 9);
                 if ($this->save_to_file) {
                     header("Content-type: image/png");
                     $res = ImagePNG($im, $filename, $quality);
                     $res = ImagePNG($im, NULL, $quality);
                 } else {
                     header("Content-type: image/png");
                     $res = ImagePNG($im, $filename, $quality);
                     $res = ImagePNG($im, NULL, $quality);
                 }
             } else {
                 if ($this->save_to_file) {
                     header("Content-type: image/png");
                     $res = ImagePNG($im, $filename);
                     $res = ImagePNG($im);
                 } else {
                     header("Content-type: image/png");
                     $res = ImagePNG($im, $filename);
                     $res = ImagePNG($im);
                 }
             }
             break;
     }
     return $res;
 }

function TransformPicture($inputfname, $outputfname, $transform)
{
    $img = ImageCreateFromPNG($inputfname);
    Imagesavealpha($img, true);
    $sizex = imagesx($img);
    $sizey = imagesy($img);
    for ($x = 0; $x < $sizex; $x++) {
        for ($y = 0; $y < $sizey; $y++) {
            $color = imagecolorat($img, $x, $y);
            $allcolors[dechex($color)]++;
            $blue = 0xff & $color;
            $green = (0xff00 & $color) >> 8;
            $red = (0xff0000 & $color) >> 16;
            foreach ($transform as $line) {
                list($from, $to) = split("\t", $line);
                list($fr, $fg, $fb) = sscanf($from, '%2x%2x%2x');
                if ($blue == $fb and $red == $fr and $green == $fg) {
                    imagesetpixel($img, $x, $y, hexdec($to));
                }
            }
        }
    }
    ImagePNG($img, "{$outputfname}");
    imagedestroy($img);
    print_r($allcolors);
}

function TransFormPicture($inputfname, $outputfname, $transform, $backgroundcolor)
{
    $img_in = ImageCreateFromPNG($inputfname);
    $sizex = imagesx($img_in);
    $sizey = imagesy($img_in);
    $img_out = @ImageCreateTrueColor($sizex, $sizey) or die("Cannot create image handle.");
    imagefill($img_out, 0, 0, hexdec($backgroundcolor));
    ImageCopy($img_out, $img_in, 0, 0, 0, 0, $sizex, $sizey);
    for ($x = 0; $x < $sizex; $x++) {
        for ($y = 0; $y < $sizey; $y++) {
            $color = imagecolorat($img_in, $x, $y);
            $allcolors[dechex($color)]++;
            $blue = 0xff & $color;
            $green = (0xff00 & $color) >> 8;
            $red = (0xff0000 & $color) >> 16;
            foreach ($transform as $line) {
                list($from, $to) = split("\t", $line);
                list($fr, $fg, $fb) = sscanf($from, '%2x%2x%2x');
                if ($blue == $fb and $red == $fr and $green == $fg) {
                    imagesetpixel($img_out, $x, $y, hexdec($to));
                }
            }
        }
    }
    ImagePNG($img_out, "out/{$outputfname}");
    imagedestroy($img_in);
    imagedestroy($img_out);
    print_r($allcolors);
}

 public function resize($width, $height)
 {
     $type = exif_imagetype($this->image);
     if ($type == 2) {
         $images_orig = ImageCreateFromJPEG($this->image);
     } elseif ($type == 3) {
         $images_orig = ImageCreateFromPNG($this->image);
     } elseif ($type == 1) {
         $images_orig = ImageCreateFromGIF($this->image);
     } else {
         return false;
     }
     $photoX = ImagesX($images_orig);
     $photoY = ImagesY($images_orig);
     $images_fin = ImageCreateTrueColor($width, $height);
     ImageCopyResampled($images_fin, $images_orig, 0, 0, 0, 0, $width + 1, $height + 1, $photoX, $photoY);
     if ($type == 2) {
         ImageJPEG($images_fin, $this->image);
     } elseif ($type == 3) {
         ImagePNG($images_fin, $this->image);
     } elseif ($type == 1) {
         ImageGIF($images_fin, $this->image);
     }
     ImageDestroy($images_orig);
     ImageDestroy($images_fin);
     return true;
 }

function rand_create()
{
    //通知浏览器将要输出PNG图片
    Header("Content-type: image/PNG");
    //准备好随机数发生器种子
    srand((double) microtime() * 1000000);
    //准备图片的相关参数
    $im = imagecreate(62, 20);
    $black = ImageColorAllocate($im, 0, 0, 0);
    //RGB黑色标识符
    $white = ImageColorAllocate($im, 255, 255, 255);
    //RGB白色标识符
    $gray = ImageColorAllocate($im, 200, 200, 200);
    //RGB灰色标识符
    //开始作图
    imagefill($im, 0, 0, $gray);
    while (($randval = rand() % 100000) < 10000) {
    }
    $_SESSION["login_check_num"] = $randval;
    //将四位整数验证码绘入图片
    imagestring($im, 5, 10, 3, $randval, $black);
    //加入干扰象素
    for ($i = 0; $i < 200; $i++) {
        $randcolor = ImageColorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
        imagesetpixel($im, rand() % 70, rand() % 30, $randcolor);
    }
    //输出验证图片
    ImagePNG($im);
    //销毁图像标识符
    ImageDestroy($im);
}

 function createAICode()
 {
     global $bBlog;
     $code = $this->randomString();
     $bBlog->db->query("\n\tDELETE FROM `" . T_CHECKCODE . "` WHERE `timestamp`+3000<NOW()");
     $bBlog->db->query("\n\tINSERT INTO `" . T_CHECKCODE . "` ( `id` , `checksum` , `timestamp` )\n\tVALUES ('', '" . md5($code . $_SERVER["REMOTE_ADDR"]) . "', NOW( ))");
     if (!isset($plugins_dir)) {
         $plugins_dir = dirname(__FILE__) . '/';
     }
     $fontfile = "atomicclockradio.ttf";
     $font = $plugins_dir . $fontfile;
     $im = @imageCreate(110, 50) or die("Cannot Initialize new GD image stream");
     $background_color = imageColorAllocate($im, 195, 217, 255);
     $text_color = imageColorAllocate($im, 168, 18, 19);
     ImageTTFText($im, 20, 5, 18, 38, $text_color, $font, $code);
     // Date in the past
     header("Expires: Thu, 28 Aug 1997 05:00:00 GMT");
     // always modified
     $timestamp = gmdate("D, d M Y H:i:s");
     header("Last-Modified: " . $timestamp . " GMT");
     // HTTP/1.1
     header("Cache-Control: no-store, no-cache, must-revalidate");
     header("Cache-Control: post-check=0, pre-check=0", false);
     // HTTP/1.0
     header("Pragma: no-cache");
     // dump out the image
     header("Content-type: image/png");
     ImagePNG($im);
 }

 /** 创建验证码 */
 public function create()
 {
     // 创建图象
     $this->_img_res = imagecreate($this->width, $this->height);
     // 填充背景
     ImageColorAllocate($this->_img_res, $this->backgroundColor[0], $this->backgroundColor[1], $this->backgroundColor[2]);
     // 分配颜色
     $col_ellipse = imagecolorallocate($this->_img_res, $this->iconColor[0], $this->iconColor[1], $this->iconColor[2]);
     $minArea = $this->iconSize / 2 + 3;
     // 混淆用图象,不完整的圆
     for ($i = 0; $i < $this->icon; $i++) {
         $x = mt_rand($minArea, $this->width - $minArea);
         $y = mt_rand($minArea, $this->height - $minArea);
         $s = mt_rand(0, 360);
         $e = $s + 330;
         imagearc($this->_img_res, $x, $y, $this->iconSize, $this->iconSize, $s, $e, $col_ellipse);
     }
     // 验证用图象,完整的圆
     $x = mt_rand($minArea, $this->width - $minArea);
     $y = mt_rand($minArea, $this->height - $minArea);
     $r = $this->iconSize / 2;
     imagearc($this->_img_res, $x, $y, $this->iconSize, $this->iconSize, 0, 360, $col_ellipse);
     // 记录圆心坐标及半径
     $this->captcha_session($this->sess_name, array($x, $y, $r));
     // 生成图象
     Header("Content-type: image/PNG");
     ImagePNG($this->_img_res);
     ImageDestroy($this->_img_res);
     exit;
 }

 function createImage($_text, $_fontsize = 11)
 {
     /* create filename */
     $filename = 'button_' . md5($_text) . '.png';
     $filename = strtolower($filename);
     /* see if file exists already, we cache it */
     if (file_exists(PHPGW_IMAGES_FILEDIR . '/' . $filename)) {
         return $filename;
     }
     $size = imagettfbbox($_fontsize, 0, $this->font, $_text);
     $dx = abs($size[2] - $size[0]);
     $dy = abs($size[5] - $size[3]);
     $xpad = 9;
     $ypad = 9;
     $im = imagecreate($dx + $xpad, $dy + $ypad);
     $blue = ImageColorAllocate($im, 0x2c, 0x6d, 0xaf);
     $black = ImageColorAllocate($im, 0, 0, 0);
     $white = ImageColorAllocate($im, 255, 255, 255);
     ImageRectangle($im, 0, 0, $dx + $xpad - 1, $dy + $ypad - 1, $black);
     ImageRectangle($im, 0, 0, $dx + $xpad, $dy + $ypad, $white);
     ImageTTFText($im, $_fontsize, 0, (int) ($xpad / 2) + 1, $dy + (int) ($ypad / 2), -$black, $this->font, $_text);
     ImageTTFText($im, $_fontsize, 0, (int) ($xpad / 2), $dy + (int) ($ypad / 2) - 1, -$white, $this->font, $_text);
     ImagePNG($im, PHPGW_IMAGES_FILEDIR . '/' . $filename);
     ImageDestroy($im);
     return $filename;
 }

 function getAuthImage($text)
 {
     $this->setpin($text);
     $im_x = 160;
     $im_y = 40;
     $im = imagecreatetruecolor($im_x, $im_y);
     $text_c = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
     $tmpC0 = mt_rand(100, 255);
     $tmpC1 = mt_rand(100, 255);
     $tmpC2 = mt_rand(100, 255);
     $buttum_c = ImageColorAllocate($im, $tmpC0, $tmpC1, $tmpC2);
     imagefill($im, 16, 13, $buttum_c);
     $font = PATH_SYS_PUBLIC . 'font-awesome/fonts/verdana.ttf';
     for ($i = 0; $i < strlen($text); $i++) {
         $tmp = substr($text, $i, 1);
         $array = array(-1, 1);
         $p = array_rand($array);
         $an = $array[$p] * mt_rand(1, 10);
         //角度
         $size = 28;
         imagettftext($im, $size, $an, 15 + $i * $size, 35, $text_c, $font, $tmp);
     }
     $distortion_im = imagecreatetruecolor($im_x, $im_y);
     imagefill($distortion_im, 16, 13, $buttum_c);
     for ($i = 0; $i < $im_x; $i++) {
         for ($j = 0; $j < $im_y; $j++) {
             $rgb = imagecolorat($im, $i, $j);
             if ((int) ($i + 20 + sin($j / $im_y * 2 * M_PI) * 10) <= imagesx($distortion_im) && (int) ($i + 20 + sin($j / $im_y * 2 * M_PI) * 10) >= 0) {
                 imagesetpixel($distortion_im, (int) ($i + 10 + sin($j / $im_y * 2 * M_PI - M_PI * 0.1) * 4), $j, $rgb);
             }
         }
     }
     //加入干扰象素;
     $count = 160;
     //干扰像素的数量
     for ($i = 0; $i < $count; $i++) {
         $randcolor = ImageColorallocate($distortion_im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
         imagesetpixel($distortion_im, mt_rand() % $im_x, mt_rand() % $im_y, $randcolor);
     }
     $rand = mt_rand(5, 30);
     $rand1 = mt_rand(15, 25);
     $rand2 = mt_rand(5, 10);
     for ($yy = $rand; $yy <= +$rand + 2; $yy++) {
         for ($px = -80; $px <= 80; $px = $px + 0.1) {
             $x = $px / $rand1;
             if ($x != 0) {
                 $y = sin($x);
             }
             $py = $y * $rand2;
             imagesetpixel($distortion_im, $px + 80, $py + $yy, $text_c);
         }
     }
     //设置文件头;
     Header("Content-type: image/JPEG");
     //以PNG格式将图像输出到浏览器或文件;
     ImagePNG($distortion_im);
     //销毁一图像,释放与image关联的内存;
     ImageDestroy($distortion_im);
     ImageDestroy($im);
 }

function create_captcha()
{
    session_start();
    //生成验证码图片
    Header("Content-type: image/PNG");
    $im = imagecreate(44, 18);
    // 画一张指定宽高的图片
    $back = ImageColorAllocate($im, 245, 245, 245);
    // 定义背景颜色
    imagefill($im, 0, 0, $back);
    //把背景颜色填充到刚刚画出来的图片中
    $vcodes = "";
    srand((double) microtime() * 1000000);
    //生成4位数字
    for ($i = 0; $i < 4; $i++) {
        $font = ImageColorAllocate($im, rand(100, 255), rand(0, 100), rand(100, 255));
        // 生成随机颜色
        $authnum = rand(1, 9);
        $vcodes .= $authnum;
        imagestring($im, 5, 2 + $i * 10, 1, $authnum, $font);
    }
    $_SESSION['VCODE'] = $vcodes;
    for ($i = 0; $i < 100; $i++) {
        $randcolor = ImageColorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
        imagesetpixel($im, rand() % 70, rand() % 30, $randcolor);
        // 画像素点函数
    }
    ImagePNG($im);
    ImageDestroy($im);
}