本篇文章的主要内容是关于用GD库在图片上编写文字的代码范例，具有一定的参考价值，感兴趣的朋友可以学习了解一下，希望对你有帮助。

<?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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