php 生成手机海报

一、生成海报方法

 

<?php


namespace App\Service;

/*生成海报*/
class GeneratePoster
{
    /**
     * 生成宣传海报
     * @param array  参数,包括图片和文字
     * @param string  $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片
     * @return [type] [description]
     */
   public function createPoster($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,$filename,90); //保存到本地
            imagedestroy($imageRes);
            if(!$res) return false;
            return $filename;
        }else{
            imagejpeg ($imageRes);     //在浏览器上显示
            imagedestroy($imageRes);
        }
    }


}

 

二、调用生成

 

use App\Service\GeneratePoster;

。。。。。。。。。

public  function  generatePoster()
    {
        $generate=new GeneratePoster();

  $config = array(
    'text'=>array(
        array(
            'text'=>'昵称',
            'left'=>182,
            'top'=>105,
            'fontPath'=>'font/simhei.ttf',     //字体文件
            'fontSize'=>18,             //字号
            'fontColor'=>'255,0,0',       //字体颜色
            'angle'=>0,
        )
    ),
    'image'=>array(
        array(
            'url'=>'font/xcx.jpg',       //图片资源路径
            'left'=>100,
            'top'=>335,
            'stream'=>0,             //图片资源是否是字符串图像流
            'right'=>0,
            'bottom'=>0,
            'width'=>100,
            'height'=>100,
            'opacity'=>100
        ),
        array(
            'url'=>'https://wx.qlogo.cn/mmopen/vi_32/DYAIOgq83eofD96opK97RXwM179G9IJytIgqXod8jH9icFf6Cia6sJ0fxeILLMLf0dVviaF3SnibxtrFaVO3c8Ria2w/0',
            'left'=>120,
            'top'=>70,
            'right'=>0,
            'stream'=>0,
            'bottom'=>0,
            'width'=>55,
            'height'=>55,
            'opacity'=>100
        ),
    ),
    'background'=>'./font/2018314113148220.png',
);
//$filename = 'qrcode/'.time().'.jpg';
//echo createPoster($config,$filename);
echo $generate->createPoster($config);

    }

 

三、效果：

 

来源：https://www.jb51.net/article/136425.htm