thinkphp框架中利用GD库在图片上编写文字的方法

这篇文章将为大家详细讲解有关thinkphp框架中利用GD库在图片上编写文字的方法，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

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<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 */
namespace Home\Event;

use \Think\Image;
use \Think\Upload;
class ImgEvent
{

    private $THINK_IMAGE = null;
    private $THINK_UPLOAD = null;

    public function __construct()
    {
        $this->THINK_IMAGE =  new Image();
        $this->THINK_UPLOAD =  new Upload();
    }

    /*
     * 保存base64文件
     * $img    string    base64类型的文件
     * $type   string    保存的文件类型
     *      app_user_head_img   用户头像
     *
     *
     */
    public function saveImg_base64($img = null , $type = null)
    {
        //获取保存图片配置
        $imgConfig_savePath = C("img_save.save_path");
        $imgConfig_size     = C("img_save.size");
        $saveFlag = false;
//        dump($imgConfig_savePath[$type]);
//        dump($imgConfig_size);

        if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $img, $result) && $imgConfig_savePath[$type])
        {

            $img_ext                = $result[2]; //图片后缀
            $img_header             = $result[1];//图片头信息
            $new_file_name          = date('Ymd').'/'.uniqid().'.'.$img_ext;
            $origin_img_path        = '';//原图的保存路径
            $origin_img_save_flag   = true;//
            foreach($imgConfig_savePath[$type] as $k => $v)
            {

                if(!is_dir($v.date('Ymd')))
                {
                    mkdir($v.date('Ymd'),0777,true);
                }

                if ($k == 'origin')
                {
                    //先保存一份原图,然后其他尺寸的保存直接调用原图路径origin_img_path.
                    $origin_res = file_put_contents($v.$new_file_name, base64_decode(str_replace($img_header, '', $img)));
                    if (!$origin_res)
                    {
                        $origin_img_save_flag = false;
                        break;
                    }
                    else
                    {
                        $saveFlag = $new_file_name;
                        $origin_img_path = $v.$new_file_name;
                        $this->THINK_IMAGE->open($origin_img_path);
                    }
                }
                else
                {
                    if ($origin_img_save_flag)
                    {
                        $width = $imgConfig_size[$type][$k]['w'];
                        $height = $imgConfig_size[$type][$k]['h'];
                        $this->THINK_IMAGE->thumb($width, $height,3)->save($v.$new_file_name);
                    }

                }
            }

        }
        return $saveFlag;
    }


    /*
     *  保存file类型文件
     *
     */
    public function saveImg_file($img = null , $type = null)
    {

        //获取保存图片配置
        $imgConfig_savePath = C("img_save.save_path");
        $imgConfig_size     = C("img_save.size");
        $saveFlag = false;

        if ($img && $imgConfig_savePath[$type])
        {

            $origin_img_save_flag   = true;
            foreach($imgConfig_savePath[$type] as $k => $v)
            {

                if(!is_dir($v.date('Ymd')))
                {
                    mkdir($v.date('Ymd'),0777,true);
                }

                if ($k == 'origin')
                {
                    $this->THINK_UPLOAD->rootPath = $v;
                    $this->THINK_UPLOAD->subName = date('Ymd');
                    $this->THINK_UPLOAD->saveName = array('uniqid','');
                    $saveRes = $this->THINK_UPLOAD->uploadOne($img);
                    if (!$saveRes)
                    {
                        $origin_img_save_flag = false;
                    }
                    else
                    {
                        $saveFlag = true;
                        $origin_img_path = $v.$saveRes['savepath'].$saveRes['savename'];
                        $this->THINK_IMAGE->open($origin_img_path);
                        $fileName = $saveRes['savepath'].$saveRes['savename'];
                    }
                }
                else
                {
                    if ($origin_img_save_flag)
                    {
                        $width = $imgConfig_size[$type][$k]['w'];
                        $height = $imgConfig_size[$type][$k]['h'];
                        $compress_img_path=$v.$fileName;
                        $saveFlag = $this->THINK_IMAGE->thumb($width, $height,3)->save($v.$fileName);

                        if (!$saveFlag)
                        {
                            $saveFlag = false;
                            $origin_img_save_flag = false;
                        }

                    }

                }


            }

            if($saveFlag)
            {
                #$saveFlag = $fileName;
                $saveFlag = array('origin'=>get_current_Host().'/'.$origin_img_path,'compress'=>get_current_Host().'/'.$compress_img_path);
            }

        }
        return $saveFlag;
    }

    public function save_file($img = null , $type = null)
    {

        //获取保存图片配置
        $imgConfig_savePath = C("img_save.save_path");
        $saveFlag = false;

        if ($img && $imgConfig_savePath[$type]) {


                if (!is_dir($imgConfig_savePath[$type] . date('Ymd'))) {
                    mkdir($imgConfig_savePath[$type] . date('Ymd'), 0777, true);
                }
                $this->THINK_UPLOAD->rootPath = $imgConfig_savePath[$type];
                $this->THINK_UPLOAD->subName = date('Ymd');
                $this->THINK_UPLOAD->saveName = array('uniqid', '');
                $saveRes = $this->THINK_UPLOAD->uploadOne($img);
                if ($saveRes) {
                    $saveFlag = true;
                    $origin_img_path = $imgConfig_savePath[$type] . $saveRes['savepath'] . $saveRes['savename'];

                    //$fileName = $saveRes['savepath'] . $saveRes['savename'];
                }
            }


            if($saveFlag)
            {
                $saveFlag = $origin_img_path;
                return get_current_Host().'/'.$saveFlag;
            }else
            {
                return $saveFlag;
            }


    }




    /*
     *  保存file类型文件,多文件
     *
     */
    public function saveImgs_files($imgs = null , $type = null)
    {

        //获取保存图片配置s
        $imgConfig_savePath = C("img_save.save_path");
        $imgConfig_size     = C("img_save.size");
        $saveFlag = false;
        $imgResArr = array();//保存图片路径
        $origin_img_path = array();//原图路径

        if ($imgs && $imgConfig_savePath[$type])
        {

            $origin_img_save_flag   = true;
            foreach($imgConfig_savePath[$type] as $k => $v)
            {

                if(!is_dir($v.date('Ymd')))
                {
                    mkdir($v.date('Ymd'),0777,true);
                }

                if ($k == 'origin')
                {
                    $this->THINK_UPLOAD->rootPath = $v;
                    $this->THINK_UPLOAD->subName = date('Ymd');
                    $this->THINK_UPLOAD->saveName = array('uniqid','');
                    $saveRes = $this->THINK_UPLOAD->upload($imgs);

                    if ($saveRes)
                    {
                        $saveFlag = true;
                        foreach ($saveRes as $srK => $srV)
                        {
                            $origin_img_path[] = $v.$saveRes[$srK]['savepath'].$saveRes[$srK]['savename'];
                            $fileName = $saveRes[$srK]['savepath'].$saveRes[$srK]['savename'];
                            $imgResArr[] = $fileName;
                        }


                    }
                }
                else
                {
                    foreach($origin_img_path as $oipK => $oipV)
                    {
                        if ($saveFlag)
                        {
                            $width = $imgConfig_size[$type][$k]['w'];
                            $height = $imgConfig_size[$type][$k]['h'];
                            $this->THINK_IMAGE->open($oipV);
                            $saveThumb = $this->THINK_IMAGE->thumb($width, $height,3)->save($v.$imgResArr[$oipK]);
                            if (!$saveThumb)
                            {
                                $saveFlag = false;
                                break;
                            }
                        }
                    }

                }

            }

            if ($saveFlag)
            {
                $saveFlag = $imgResArr;
            }
        }
        return $saveFlag;
    }

    /*
     * 保存微信头像 - url
     *
     */
    public function save_WxImg($picUrl = '',$type = null)
    {

        $ch = curl_init($picUrl);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_NOBODY, 0);    //对body进行输出。
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $package = curl_exec($ch);
        $httpInfo = curl_getinfo($ch);
        curl_close($ch);
        $media = array_merge(array('mediaBody' => $package), $httpInfo);

        //求出文件格式
        preg_match('/\w\/(\w+)/i', $media["content_type"], $extmatches);
        $fileExt = $extmatches[1];

        $saveName = md5(microtime(true)).".{$fileExt}";

        //获取保存图片配置
        $imgConfig_savePath = C("img_save.save_path");
        $imgConfig_size     = C("img_save.size");
        $saveFlag = false;

        if ($imgConfig_savePath[$type])
        {

            $origin_img_save_flag   = true;
            foreach($imgConfig_savePath[$type] as $k => $v)
            {

                if(!is_dir($v.date('Ymd')))
                {
                    mkdir($v.date('Ymd'),0777,true);
                }

                if ($k == 'origin')
                {
                    file_put_contents($v.'/'.date('Ymd').'/'.$saveName,$media['mediaBody']);

                    $origin_img_path = $v.'/'.date('Ymd').'/'.$saveName;
                    $this->THINK_IMAGE->open($origin_img_path);
                    $fileName = date('Ymd').'/'.$saveName;
                }
                else
                {
                    if ($origin_img_save_flag)
                    {
                        $width = $imgConfig_size[$type][$k]['w'];
                        $height = $imgConfig_size[$type][$k]['h'];
                        $saveFlag = $this->THINK_IMAGE->thumb($width, $height,3)->save($v.$fileName);

                        if (!$saveFlag)
                        {
                            $saveFlag = false;
                            $origin_img_save_flag = false;
                        }
                        else
                        {
                            $saveFlag = $fileName;
                        }
                    }

                }
            }
        }
        return $saveFlag;

    }

    /*
     *  保存file类型文件
     *
     */
    public function saveImg_Wx($WxImg = array() , $type = null)
    {

        //获取保存图片配置
        $imgConfig_savePath = C("img_save.save_path");
        $imgConfig_size     = C("img_save.size");
        $saveFlag = false;
        $imgResArr = array();
        
        if ($WxImg && $imgConfig_savePath[$type])
        {


            foreach ($WxImg as $wiK => $wiV)
            {

                $wxImg = $this->getWxImg($wiV);

                $origin_img_save_flag   = true;
                foreach($imgConfig_savePath[$type] as $k => $v)
                {

                    if(!is_dir($v.date('Ymd')))
                    {
                        mkdir($v.date('Ymd'),0777,true);
                    }

                    if ($k == 'origin')
                    {
                        file_put_contents($v.'/'.date('Ymd').'/'.$wxImg['saveName'],$wxImg['imgMedia']['mediaBody']);

                        $origin_img_path = $v.'/'.date('Ymd').'/'.$wxImg['saveName'];
                        $this->THINK_IMAGE->open($origin_img_path);
                        $fileName = date('Ymd').'/'.$wxImg['saveName'];
                        $imgResArr[] = $fileName;
                    }
                    else
                    {
                        if ($origin_img_save_flag)
                        {
                            $width = $imgConfig_size[$type][$k]['w'];
                            $height = $imgConfig_size[$type][$k]['h'];
                            $saveFlag = $this->THINK_IMAGE->thumb($width, $height,3)->save($v.$fileName);

                            if (!$saveFlag)
                            {
                                $saveFlag = false;
                                $origin_img_save_flag = false;
                            }
                            else
                            {
                                $saveFlag = $fileName;
                            }
                        }

                    }
                }
            }


            if($saveFlag)
            {
                $saveFlag = $imgResArr;
            }

        }
        return $saveFlag;
    }
　　

    /*
     * 保存用户的推广图片   在图片上写字!!!!
     */
    public function save_userShareImg($bg_img_path = '' , $head_img_path = '' , $qrCode_img_path = '' , $saveFile = '' , $userName = '' , $userDscp = '' , $font_path = '')
    {

        
        //设置头像图片为圆角
        $head_img_radius = $this->radius_img($head_img_path,240);
        //合并到背景图中
        $this->mergeImage($bg_img_path,$head_img_radius,$saveFile,array('left' => 200, 'top' => 55, 'width' => 480, 'height' => 480));
        //设置名称
        $this->writeText($saveFile, $saveFile, $userName,255,255,255,1010,32,$font_path, array());
        //设置二维码内容
        $this->mergeImage($saveFile,$qrCode_img_path,$saveFile,array('left' => 255, 'top' => 684, 'width' => 250, 'height' => 245));

        return $saveFile;
    }

    /*
     * 合并图片
     */
    private function mergeImage($bg_img, $main_img, $saveFile, $param)
    {

        extract($param);
//        list($bgWidth, $bgHeight) = getimagesize($bg_img);
        $bgImg = $this->imagecreate($bg_img);
        if (!is_resource($main_img))
        {
            list($mainWidth, $mainHeight) = getimagesize($main_img);
            $mainImg = $this->imagecreate($main_img);
        }
        else
        {
            $mainImg = $main_img;

            $mainWidth = $width;
            $mainHeight = $height;
        }
        imagecopyresized($bgImg, $mainImg, $left, $top, 0, 0, $width, $height, $mainWidth, $mainHeight);
//        imagecopyresized($bgImg, $mainImg, $left, $top, 0, 0, $width, $height, $width,$height);
        ob_start();
        // output jpeg (or any other chosen) format & quality
        imagejpeg($bgImg, NULL, 100);
        $contents = ob_get_contents();
        ob_end_clean();
        imagedestroy($bgImg);
        imagedestroy($mainImg);
        $fh = fopen($saveFile, "w+");
        fwrite($fh, $contents);
        fclose($fh);
    }

    /*
     * 图片写文字
     * $bg_img 背景图片
     * $saveFile 保存图片路径
     * $text 文字
     * $fontColor 字体颜色
     * $top 图片距离顶端高度
     * $fontSize 字体大小
     * $font 字体路径
     * $param 传递的参数
     */
    private function writeText($bg_img, $saveFile, $text, $colorR,$colorG,$colorB , $top , $fontSize , $font , $param = array())
    {
        list($bgWidth, $bgHeight) = getimagesize($bg_img);
        $im = imagecreatefromjpeg($bg_img);

        $fontColor = imagecolorallocate($im, $colorR, $colorG, $colorB);//字的RGB颜色
        $str = mb_convert_encoding($text, "html-entities", "utf-8");;//解决乱码问题

        $fontBox = imagettfbbox($fontSize, 0, $font, $str);//文字水平居中实质
        $width = imagesx($im);
        imagettftext($im, $fontSize, 0, ceil(($width - $fontBox[2]) / 2), $top, $fontColor, $font, $str);


        ob_start();
        // output jpeg (or any other chosen) format & quality
        imagejpeg($im, NULL, 100);
        $contents = ob_get_contents();
        ob_end_clean();
        imagedestroy($im);
        $fh = fopen($saveFile, "w+");
        fwrite($fh, $contents);
        fclose($fh);
    }

    /**
     * 处理圆角图片
     * @param  string $imgPath 源图片路径
     * @param  integer $radius 圆角半径长度默认为15,处理成圆型
     * @return [type]           [description]
     */
    public function radius_img($imgPath = '', $radius = 65)
    {
        $ext = pathinfo($imgPath);
        $src_img = null;
        switch ($ext['extension']) {
            case 'jpg':
                $src_img = imagecreatefromjpeg($imgPath);
                break;
            case 'png':
                $src_img = imagecreatefrompng($imgPath);
                break;
            default:
                $src_img = imagecreatefromjpeg($imgPath);
                break;
        }
        $wh = getimagesize($imgPath);
        $w = $wh[0];
        $h = $wh[1];
        // $radius = $radius == 0 ? (min($w, $h) / 2) : $radius;
        $img = imagecreatetruecolor($w, $h);
        //这一句一定要有
        imagesavealpha($img, true);
        //拾取一个完全透明的颜色,最后一个参数127为全透明
        $bg = imagecolorallocatealpha($img, 255, 255, 255, 127);
        imagefill($img, 0, 0, $bg);
        $r = $radius; //圆 角半径
        for ($x = 0; $x < $w; $x++) {
            for ($y = 0; $y < $h; $y++) {
                $rgbColor = imagecolorat($src_img, $x, $y);
                if (($x >= $radius && $x <= ($w - $radius)) || ($y >= $radius && $y <= ($h - $radius))) {
                    //不在四角的范围内,直接画
                    imagesetpixel($img, $x, $y, $rgbColor);
                } else {
                    //在四角的范围内选择画
                    //上左
                    $y_x = $r; //圆心X坐标
                    $y_y = $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                    //上右
                    $y_x = $w - $r; //圆心X坐标
                    $y_y = $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                    //下左
                    $y_x = $r; //圆心X坐标
                    $y_y = $h - $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                    //下右
                    $y_x = $w - $r; //圆心X坐标
                    $y_y = $h - $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                }
            }
        }
        return $img;
    }

    private function imagecreate($bg)
    {
        $bgImg = @imagecreatefromjpeg($bg);
        if (FALSE == $bgImg) {
            $bgImg = @imagecreatefrompng($bg);
        }
        if (FALSE == $bgImg) {
            $bgImg = @imagecreatefromgif($bg);
        }
        return $bgImg;
    }


    /*
     * 下载微信服务器的图片
     * media_id    微信的媒体id
     * type        保存图片类型
     * */
    public function getWxImg($mediaId)
    {
        if(!class_exists('\JSSDK') && !class_exists('\WxPayConfig'))
        {
            vendor('wxsdkapi.jssdk');
            vendor('wxpayapi.lib.WxPay#Config');
        }
        $res = new \JSSDK(C('WEIXINPAY_CONFIG.APPID'),C('WEIXINPAY_CONFIG.APPSECRET'));
        $accessToken = $res->getAccessToken();
    
//    $mediaId = 'cVqPIhDPPThUtayzS27GK6RN4-dseA6AZnTJxcg7_VaeuAaKcL53X32hmKxhgiSD';
//    $accessToken = 'KHaopJY444kJ06LcH9ESj-73pkEfFTgIr3L45RURuUxv1KTjgXyFepJ-cTIF_oUyAKyYb5dK2r9L_wC-WDw2USqGQBMobC6DzPImuhPqxB8jxZ41CuLDtJiaEZk8Vf5kWSSjAAAAWW';
        $picUrl = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=$accessToken&media_id=$mediaId";

        $ch = curl_init($picUrl);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_NOBODY, 0);    //对body进行输出。
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $package = curl_exec($ch);
        $httpInfo = curl_getinfo($ch);
        curl_close($ch);
        $media = array_merge(array('mediaBody' => $package), $httpInfo);

        //求出文件格式
        preg_match('/\w\/(\w+)/i', $media["content_type"], $extmatches);
        $fileExt = $extmatches[1];

        $saveName = md5(microtime(true)).".{$fileExt}";

        $img = array('imgMedia'=>$media,'saveName'=>$saveName);

        return $img;
    }
        /*
     * 下载微信服务器的图片
     * media_id    微信的媒体id
     * type        保存图片类型
     * */
    public function getWxImg2($mediaId,$file)
    {
        if(!class_exists('\JSSDK') && !class_exists('\WxPayConfig'))
        {
            vendor('wxsdkapi.jssdk');
            vendor('wxpayapi.lib.WxPay#Config');
        }
        $res = new \JSSDK(C('WEIXINPAY_CONFIG.APPID'),C('WEIXINPAY_CONFIG.APPSECRET'));
        $accessToken = $res->getAccessToken();
        $picUrl = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=$accessToken&media_id=$mediaId";
    
        
       

        return httpcopy($picUrl,$file);
    }

}

调用方法:

/**
     * 生成图片
     * @param varchar  tid 任务id
     * @httpmethod POST
     * @response 响应数据
     * {
     *   "ResultType": "1000",
     *   "Message": "上传成功",
     *   "AppendData": "图片路径",
     * }
     */
    public function UploadNavImg()
    {
        $tid=Util::getSafeText(I('post.tid'));
        $imgEven = A('Gszc/Img','Event');
        //查出公司名称
        $res = M('gszc_tasks as t')
            ->join('app_gszc_userinfo as u on u.tid=t.id')
            ->where('t.id='.$tid)
            ->field('u.*,t.lastname')
            ->find();

        //主营业务范围
        $zyywfws = explode('、',$res['zyywfw']);
        $zyywfw = array_slice($zyywfws, 0,3);  //获取前三个主营业范围
        $zyywfw2 = array_slice($zyywfws, 3,6);  //获取后三个主营业务范围

        $imageName = date("His",time())."_".rand(1111,9999).'.jpg';
        $dir = date('Ymd');
        $path = 'uploads/company/'.$dir;
        if (!is_dir($path)){ //判断目录是否存在 不存在就创建
            mkdir($path,0777,true);
        }
        $img = $imgEven->save_userShareImg($_SERVER['DOCUMENT_ROOT']."/uploads/test.png",'','',$_SERVER['DOCUMENT_ROOT']."/".$path."/". $imageName,$res['lastname'],$zyywfw, $zyywfw2, '',$_SERVER['DOCUMENT_ROOT']."/uploads/PingFang Bold.ttf");

        if($img){
            //生成照片成功 保存到任务表里
            $tasks = M('gszc_tasks')->where('id='.$tid)->setField('lastpic',$path."/".$imageName);
            if($tasks){
                $lujing = $path."/".$imageName;
                $this->array_return['errno']=self::__OK__;
                $this->array_return['errmsg']='生成成功！';
                $this->array_return['data']= $lujing ;
                $this->ajaxReturn($this->array_return);
            }
        }else{
            $this->array_return['errno']=self::__ERROR__;
            $this->array_return['errmsg']='生成失败！';
            $this->array_return['data']=[];
            $this->ajaxReturn($this->array_return);
        }
    }

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