在php中优化图像时找不到这样的文件或目录(No such file or directory found while optimize the image in php)

 我正在上传图像和我正在优化的图像，但我收到错误“没有这样的文件或目录”。 我收到以下代码的错误。 
 
  $source_img =basename($_FILES["fileToUpload"]["name"]);
 
 如果我写$source_img = 'assets/img/login-bg.jpg'; 然后它正在工作。 我想上传图片然后优化它。 
 
 我收到了错误 
 
  Warning: getimagesize(demoimg.JPG): failed to open stream: No such file or directory in C:\xampp\htdocs\... on line 6

  Notice: Undefined variable: image in C:\xampp\htdocs\... on line 17

  Warning: imagejpeg() expects parameter 1 to be resource, null given in C:\xampp\htdocs\... on line 17
 
 HTML 
 
  <form action="" method="post" enctype="multipart/form-data">
  Select image to upload:
  <input type="file" name="fileToUpload" id="fileToUpload">
  <input type="submit" value="Upload Image" name="submit">
  </form>
 
 PHP 
 
  function compress($source, $destination, $quality) {
  $info = getimagesize($source);
  if ($info['mime'] == 'image/jpeg') 
  $image = imagecreatefromjpeg($source);

  elseif ($info['mime'] == 'image/gif') 
  $image = imagecreatefromgif($source);

  elseif ($info['mime'] == 'image/png') 
  $image = imagecreatefrompng($source);

  imagejpeg($image, $destination, $quality);
  return $destination;
  }

  if(isset($_POST['submit'])){
  $source_img =basename($_FILES["fileToUpload"]["name"]);
  $temp = explode(".", $source_img);
  $newfilename = round(microtime(true)) . '.' . end($temp);
  $destination_img= "assets/$newfilename";

  $d = compress($source_img, $destination_img, 90);
  }

I am uploading the image and that image I am optimizing but I am getting the error "No such file or directory". I am getting the error on below code.
 
  $source_img =basename($_FILES["fileToUpload"]["name"]);
 
If I write $source_img = 'assets/img/login-bg.jpg'; then it is working. I want to upload image and then optimize it.
 
I am getting the error
 
  Warning: getimagesize(demoimg.JPG): failed to open stream: No such file or directory in C:\xampp\htdocs\... on line 6

  Notice: Undefined variable: image in C:\xampp\htdocs\... on line 17

  Warning: imagejpeg() expects parameter 1 to be resource, null given in C:\xampp\htdocs\... on line 17
 
HTML
 
  <form action="" method="post" enctype="multipart/form-data">
  Select image to upload:
  <input type="file" name="fileToUpload" id="fileToUpload">
  <input type="submit" value="Upload Image" name="submit">
  </form>
 
php
 
  function compress($source, $destination, $quality) {
  $info = getimagesize($source);
  if ($info['mime'] == 'image/jpeg') 
  $image = imagecreatefromjpeg($source);

  elseif ($info['mime'] == 'image/gif') 
  $image = imagecreatefromgif($source);

  elseif ($info['mime'] == 'image/png') 
  $image = imagecreatefrompng($source);

  imagejpeg($image, $destination, $quality);
  return $destination;
  }

  if(isset($_POST['submit'])){
  $source_img =basename($_FILES["fileToUpload"]["name"]);
  $temp = explode(".", $source_img);
  $newfilename = round(microtime(true)) . '.' . end($temp);
  $destination_img= "assets/$newfilename";

  $d = compress($source_img, $destination_img, 90);
  }

原文：https://stackoverflow.com/questions/43703188