php图片合成【png图片】

php 图片合成【png图片】

• 示例代码

<?php
header("Content-type:text/html;charset=utf-8");
error_reporting(E_ALL);

define("WWWROOT",str_replace(DIRECTORY_SEPARATOR,'/',str_ireplace(str_replace("/","\",$_SERVER['PHP_SELF']),'',__FILE__)."\"));

$img1 = WWWROOT."resource/big.png";
$img2 = WWWROOT."resource/small.png";

$image_1 = imagecreatefrompng($img1);
$image_2 = imagecreatefrompng($img2);

$left = intval((imagesx($image_1) - imagesx($image_2)) / 2);
$top  = intval((imagesy($image_1) - imagesy($image_2)) / 2);

imagecopymerge($image_1, $image_2, $left, $top, 0, 0, imagesx($image_2), imagesy($image_2), 100);
$merge = WWWROOT."resource/merge1.png";

$down = imagepng($image_1, $merge);
if  ($down) {

    return $merge;

}  else {

    return false;
}

• 代码参考补充

//参数 活动模板图片，二维码url，模板内二维码的位置
function getActivityImg($template,$url,$x,$y)
{
        require_once  library_path("/phpqrcode.php");

        //二维码中间添加logo
        $logo = public_path('/assets/img/logos/logo.png');
        $QR = "base.png";
        $last = "last.png";
        $errorCorrectionLevel = 'Q'; //防错等级
        $matrixPointSize = 8; //二维码大小

        //生成二维码
        //参数内容:二维码储存内容，生成存储，防错等级，二维码大小，白边大小
        QRcode::png($url, $QR, $errorCorrectionLevel, $matrixPointSize, 1);

        //合并logo跟二维码-----------------start
        $QR = imagecreatefromstring(file_get_contents($QR));
        $logo = imagecreatefromstring(file_get_contents($logo));
        $QR_width = imagesx($QR);
        $logo_width = imagesx($logo);
        $logo_height = imagesy($logo);
        $logo_qr_width = $QR_width / 5;
        $scale = $logo_width / $logo_qr_width;
        $logo_qr_height = $logo_height / $scale;
        $from_width = ($QR_width - $logo_qr_width) / 2;
        imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
        imagepng($QR,$last); // 生成带log的二维码图片 存储到last
        //合并logo跟二维码-----------------end


        //合成带logo的二维码图片跟 模板图片--------------start
        $path_1 = $template;
        $path_2 = $last;
        $image_1 = imagecreatefromjpeg($path_1);
        $image_2 = imagecreatefrompng($path_2);
        $image_3 = imageCreatetruecolor(imagesx($image_1),imagesy($image_1));
        $color = imagecolorallocate($image_3, 255, 255, 255);
        imagefill($image_3, 0, 0, $color);
        imageColorTransparent($image_3, $color);
        imagecopyresampled($image_3, $image_1, 0, 0, 0, 0, imagesx($image_1), imagesy($image_1), imagesx($image_1), imagesy($image_1));

        imagecopymerge($image_3, $image_2, $x, $y,0, 0, imagesx($image_2), imagesy($image_2), 100);
        //合成带logo的二维码图片跟 模板图片--------------end

        //输出到本地文件夹
        $fileName=md5(basename($template).$url);
        $EchoPath='/assets/img/'.$fileName.'.png';
        imagepng($image_3,public_path($EchoPath));
        imagedestroy($image_3);
        //返回生成的路径
        return $EchoPath;
}