php绘制海报方法

这个展示了用php绘制宣传海报的方法，组成部分有微信的头像昵称，带参数的二维码，将这些信息绘制在一张图片上面
获取微信头像保存

// $url  远程图片路径
// $save_dir 保存图片路径
// $filename 文件名
// $type 获取远程图片的方法
   public function getImage($url,$save_dir='',$filename='',$type=0){
        if(trim($url)==''){
          return array('file_name'=>'','save_path'=>'','error'=>1);
        }
        if(trim($save_dir)==''){
            $save_dir='./';
        }
        if(trim($filename)==''){//保存文件名
            $ext=strrchr($url,'.');
            if($ext!='.gif'&&$ext!='.jpg'){
                return array('file_name'=>'','save_path'=>'','error'=>3);
            }
            $filename=time().$ext;
        }
        if(0!==strrpos($save_dir,'/')){
            $save_dir.='/';
        }
        //创建保存目录
        if(!file_exists($save_dir)&&!mkdir($save_dir,0777,true)){
            return array('file_name'=>'','save_path'=>'','error'=>5);
        }
        //获取远程文件所采用的方法
        if($type){
            $ch=curl_init();
            $timeout=5;
            curl_setopt($ch,CURLOPT_URL,$url);
            curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
            curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
            $img=curl_exec($ch);
            curl_close($ch);
        }else{
            ob_start();
            readfile($url);
            $img=ob_get_contents();
            ob_end_clean();
        }
        //文件大小
        $fp2=@fopen($save_dir.$filename,'a');
        fwrite($fp2,$img);
        fclose($fp2);
        unset($img,$url);
        return array('file_name'=>$filename,'save_path'=>$save_dir.$filename,'error'=>0);
    }

绘制二维码

use phpqrcode\QRcode;

    public function qrcode($url,$imagename){
        $mk = date("Y-m-d");
        $path = "qrcode/".$mk."/".$imagename.".jpg";
        if(!file_exists('./qrcode/'.$mk.'/')){
            mkdir('qrcode/'.$mk.'/',0777,true);
        }
        $level=3;
        $size=5;
        $errorCorrectionLevel =intval($level);
        $matrixPointSize = intval($size);
        QRcode::png($url, $path, $errorCorrectionLevel, $matrixPointSize, 2);
        $img_url = $path;
        return $img_url;
    }

生成图片的参数 图片样式摆放

public function configs($nickname,$avatar_url,$qrCode,$background,$left,$top){
        $config = array(
           'text'=>array(
                array(
                   'text'=>$nickname,
                   'left'=>182,
                   'top'=>100,
                   'fontPath'=>'qrcode/simhei.ttf',     //字体文件
                   'fontSize'=>36,             //字号
                   'fontColor'=>'255,255,255',       //字体颜色
                   'angle'=>0,
                ),
                array(
                   'text'=>'标题',
                   'left'=>182,
                   'top'=>160,
                   'fontPath'=>'qrcode/simhei.ttf',     //字体文件
                   'fontSize'=>24,             //字号
                   'fontColor'=>'255,255,255',       //字体颜色
                   'angle'=>0,
                )
            ),
            'image'=>array(
                array(
                    'url'=>$qrCode,       //图片资源路径
                    'stream'=>0,
                    'left'=>$left,
                    'top'=>$top,
                    'right'=>0,
                    'bottom'=>0,
                    'width'=>190,
                    'height'=>190,
                    'opacity'=>100
                ),
                array(
                    'url'=>$avatar_url,
                    'left'=>40,
                    'top'=>50,
                    'right'=>0,
                    'stream'=>0,
                    'bottom'=>0,
                    'width'=>120,
                    'height'=>120,
                    'opacity'=>100
                ),
            ),
            'background'=>$background,
        );
        return $config;
    }

生成宣传海报方法

public function createPoster($config=array(),$filename=""){
        //如果要看报什么错，可以先注释调这个header 
        if(empty($filename)) header("content-type: image/png");
            $imageDefault = array(
                'left'=>0,
                'top'=>0,
                'right'=>0,
                'bottom'=>0,
                'width'=>100,
                'height'=>100,
                'opacity'=>100
            );
            $textDefault =  array(
                'text'=>'',
                'left'=>0,
                'top'=>0,
                'fontSize'=>32,             //字号
                'fontColor'=>'255,255,255', //字体颜色
                'angle'=>0,
            );
        $background = $config['background'];//海报最底层得背景  
        //背景方法
        $backgroundInfo = getimagesize($background);
        $backgroundFun = 'imagecreatefrom'.image_type_to_extension($backgroundInfo[2], false);
        $background = $backgroundFun($background);
     
        $backgroundWidth = imagesx($background);    //背景宽度
        $backgroundHeight = imagesy($background);   //背景高度
     
        $imageRes = imageCreatetruecolor($backgroundWidth,$backgroundHeight); 
        $color = imagecolorallocate($imageRes, 0, 0, 0);  
        imagefill($imageRes, 0, 0, $color);  
        // imageColorTransparent($imageRes, $color);    //颜色透明
        imagecopyresampled($imageRes,$background,0,0,0,0,imagesx($background),imagesy($background),imagesx($background),imagesy($background));
        //处理了图片
        if(!empty($config['image'])){
            foreach ($config['image'] as $key => $val) {
                $val = array_merge($imageDefault,$val);
                $info = getimagesize($val['url']);
                $function = 'imagecreatefrom'.image_type_to_extension($info[2], false);
                if($val['stream']){     //如果传的是字符串图像流
                    $info = getimagesizefromstring($val['url']);
                    $function = 'imagecreatefromstring';
                }
                $res = $function($val['url']);
                $resWidth = $info[0];
                $resHeight = $info[1];
                //建立画板 ，缩放图片至指定尺寸
                $canvas=imagecreatetruecolor($val['width'], $val['height']); 
                imagefill($canvas, 0, 0, $color);
                //关键函数，参数（目标资源，源，目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h） 
                imagecopyresampled($canvas, $res, 0, 0, 0, 0, $val['width'], $val['height'],$resWidth,$resHeight); 
                $val['left'] = $val['left']<0?$backgroundWidth- abs($val['left']) - $val['width']:$val['left'];
                $val['top'] = $val['top']<0?$backgroundHeight- abs($val['top']) - $val['height']:$val['top'];
                //放置图像
                imagecopymerge($imageRes,$canvas, $val['left'],$val['top'],$val['right'],$val['bottom'],$val['width'],$val['height'],$val['opacity']);//左，上，右，下，宽度，高度，透明度 
            }
        }
     
        //处理文字
        if(!empty($config['text'])){
            foreach ($config['text'] as $key => $val) {
                $val = array_merge($textDefault,$val);
                list($R,$G,$B) = explode(',', $val['fontColor']);
                $fontColor = imagecolorallocate($imageRes, $R, $G, $B); 
                $val['left'] = $val['left']<0?$backgroundWidth- abs($val['left']):$val['left'];
                $val['top'] = $val['top']<0?$backgroundHeight- abs($val['top']):$val['top'];
                imagettftext($imageRes,$val['fontSize'],$val['angle'],$val['left'],$val['top'],$fontColor,$val['fontPath'],$val['text']); 
            }
        }   

        //生成图片  
        if(!empty($filename)){
            $res = imagejpeg ($imageRes,$filename); //保存到本地
            imagedestroy($imageRes);
            if(!$res) return false;
            return $filename;
        }else{
            imagejpeg ($imageRes);          //在浏览器上显示
            imagedestroy($imageRes);
        }  
    }

调用

$url = 'url';
$imagename = '图片名字';
//生成二维码返回路径
$qrcode = $this->qrcode($url,$imagename);
//生成图片的参数
$nickname  = '昵称';
$avatar_url = '头像';
$value['background'] =  '背景图';
$value['left'] =  '左边距';
$value['top'] =  '上边距';
$config = $this->configs($nickname,$avatar_url,$qrcode,$value['background'],$value['left'],$value['top']);
$filename = $qrcode;
//生成海报返回路径
$urls = $this->createPoster($config,$filename);

绘制二维码的方法
二维码生成方法采用phpqrcode插件 ，采用命名空间设计在extend建立phpqrcode文件夹，下面在建立QRcode.php