Question

我想在上传的图片大小超过3MB时发出错误消息。这是我目前的代码。它应该在图像超过3MB时发出错误消息，但它什么都不做。我的代码出了什么问题？

if ( $_FILES['file']['size'] != 0 ) 
{
 //image check start
 if ((($_FILES["file"]["type"] == "image/gif")
 || ($_FILES["file"]["type"] == "image/jpeg")
 || ($_FILES["file"]["type"] == "image/png")
 || ($_FILES["file"]["type"] == "image/pjpeg"))
 && ($_FILES["file"]["size"] < 3072000))
 //image check end
 {
      if (file_exists($upload_path."/".$_FILES["file"]["name"])) 
      {
           $file_tmp = $_FILES["file"]["name"];
      } //Link if there is already a file with identical file name
      else
      {
           $photoid = $upfile_idx.".".substr($_FILES['file']['name'],-3);
           move_uploaded_file($_FILES["file"]["tmp_name"], $upload_path."/".$photoid);
           $file_tmp = $photoid ;
      } //Upload the image file into upload folder and generate an id for the image
  }
  else
  {
      error("Maximum image size exceeded or invalid file format.");
  }
}

//insert $file_tmp into database here

----------
Error code (added later)
function error($msg)
{
  echo "<script>alert(\"$msg\");history.go(-1);</script>";
  exit;
}

我发现了什么是错的。在我的php.ini文件中，有'upload_max_filesize = 3M'，显然这就是导致所有问题的原因。当我将其更改为'upload_max_filesize = 4M'时，一切正常。谢谢大家的帮助。

Answer 1

以下内容应该对你有好处。

<?php 
if ( $_FILES['file']['size'] != 0 ) 
{
 //image check start

 if(!in_array($_FILES["file"]["type"], array("image/gif", "image/jpeg", "image/png", "image/pjpeg")))
 {
    error("File should be a JPG/JPEG/PNG/PJEPG only");
    return; 
 }
 if($_FILES["file"]["size"] > 3145728)
 {
    error("File should be less than 3 MB");   
    return; 
 }
 #Rest of your upload code should go below here.
}
?>

3145728转换为3 MB的字节数，因为$ _FILES [“file”] [“size”]给出了以字节为单位上传的文件的大小。

php错误处理错误（文件上传）

1 个答案: