一、laravel图片上传方法

  1. public function uploadPic($file)
  2.     {
  3.         $ext     = $file->getClientOriginalExtension();
  4.         $ext_arr = array('gif', 'jpg', 'jpeg', 'bmp', 'png');
  5.         if (!in_array($ext, $ext_arr)) {
  6.             return ['error_msg' => '图片格式错误'];
  7.         }
  8.         if ($file->isValid()) {
  9.             $newName  = date("YmdHis") . str_pad(mt_rand(0, 999999), 6, 0, STR_PAD_LEFT) . "." . $ext;
  10.             $path_str = 'upload/img/' . date("Y") . "/" . date("md") . "/";
  11.             $url_path = public_path($path_str);
  12.             if (!is_dir($url_path)) {
  13.                 mkdir($url_path, 0755, true);
  14.             }
  15.             $path = $file->move($url_path, $newName);
  16.             if ($path) {
  17.                 $namePath = "/" . $path_str . $newName;
  18.                 return ['path' => $namePath];
  19.             }
  20.         }
  22.         return ['error_msg' => '上传失败'];
  23.     }

二、图片处理类

  1. <?php
  2. /**
  3.  * Created by PhpStorm.
  4.  * User: Administrator
  5.  * Date: 2021/9/9 0009
  6.  * Time: 下午 5:03
  7.  */
  9. namespace App\Logic;
  12. use App\Http\Controllers\Controller;
  14. class ImgCompressLogic extends Controller
  15. {
  16.       //生成图片路径（保存路径、图片url）
  17.     public function createImgPath($ext)
  18.     {
  19.         $newName  = date("YmdHis") . str_pad(mt_rand(0, 999999), 6, 0, STR_PAD_LEFT) . "." . $ext;
  20.         $path_str = 'upload/img/' . date("Y") . "/" . date("md") . "/";
  21.         $url_path = public_path($path_str);
  22.         $newPath  = $url_path . $newName;
  23.         $namePath = "/" . $path_str . $newName;
  24.         return [
  25.             'savePath' => $newPath,
  26.             'namePath' => $namePath
  27.         ];
  28.     }
  30.     /**
  31.      * 压缩图片
  32.      * @param $filename
  33.      * @param $newx
  34.      * @param $newy
  35.      * @param $ext
  36.      * @return string
  37.      */
  38.     function resize_image($filename, $newx, $newy, $ext)
  39.     { //根据后缀，由文件或 URL 创建一个新图象(内置函数)
  40.         if ($ext == "jpg" || $ext == "jpeg") $im = imagecreatefromjpeg($filename);
  41.         elseif ($ext == "png") $im = imagecreatefrompng($filename);
  42.         elseif ($ext == "gif") $im = imagecreatefromgif($filename);
  43.         //获取当前待修改图片像素（内置函数）
  44.         $x = imagesx($im);
  45.         $y = imagesy($im);
  46.         //新建一个真彩色图像(内置函数)
  47.         $im2 = imagecreatetruecolor($newx, $newy);
  48.         //重采样拷贝部分图像并调整大小(内置函数)
  49.         imagecopyresampled($im2, $im, 0, 0, 0, 0, floor($newx), floor($newy), $x, $y);
  50.         //return $im2;
  51.         $newPath = $this->createImgPath($ext); //生成图片相关路径
  52.         if ($ext == "jpg" || $ext == "jpeg") {
  53.             imagejpeg($im2, $newPath);
  54.         } elseif ($ext == "png") {
  55.             imagepng($im2, $newPath);
  56.         } elseif ($ext == "gif") {
  57.             imagegif($im2, $newPath);
  58.         }
  59.         return $newPath['savePath'];
  60.     }
  62.       //计算图片宽高，并保存转换前的图片和转换后的图片
  63.       //本例已生成单边不大于2500像素的图片为例
  64.     public function calculateThePicture($imageFile)
  65.     {
  66.         list($width, $height) = getimagesize($imageFile);
  67.         $ext   = $imageFile->getClientOriginalExtension();
  68.         $ratio = $width / $height;
  69.         if ($width <= 2500 && $height <= 2500) { 
  70.             return [
  71.                 'file' => $imageFile,
  72.                 'ext'  => $ext
  73.             ];
  74.         }
  75.         if ($width > $height) {
  76.             if ($width > 2500) {
  77.                 $newWidth  = 2500;
  78.                 $newHeight = round($newWidth / $ratio);
  79.             }
  80.         }
  81.         if ($width == $height) {
  82.             if ($width > 2500) {
  83.                 $newWidth  = 2500;
  84.                 $newHeight = 2500;
  85.             }
  86.         }
  87.         if ($width < $height) {
  88.             if ($height > 2500) {
  89.                 $newHeight = 2500;
  90.                 $newWidth  = round($newHeight * $ratio);
  91.             }
  92.         }
  93.         if (isset($newWidth) && isset($newHeight)) {
  94.             $uploadLogic = new UploadLogic();
  95.             $res         = $uploadLogic->uploadPic($imageFile);
  96.             if (!empty($res['error_msg'])) {
  97.                 return ['error_msg' => $res['error_msg']];
  98.             }
  99.             $newImgPath = $this->resize_image(get_domain(1) . $res['path'], $newWidth, $newHeight, $ext);
  100.             return [
  101.                 'file' => $newImgPath,
  102.                 'ext'  => $ext
  103.             ];
  104.         }
  106.     }
  108. }