thinkphp框架如何利用GD库在图片上编写文字（代码范例）

2024-09-09 15:20:31

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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);

        }

    }