thinkphp框架如何利用GD库在图片上编写文字（代码范例）

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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