Php restricts the Upload file type and saves the uploaded file

This article mainly introduces php's method of limiting the file upload type and saving the file to be uploaded. it involves php's common operations on file upload, which is of great practical value, for more information about how to restrict the upload type and save the file, see the example in this article. Share it with you for your reference. The details are as follows:

The following code demonstrates how to obtain a user-uploaded file in php, limit the file type of a general image file, and save it to the server.

<?php$allowedExts = array("gif", "jpeg", "jpg", "png");$extension = end(explode(".", $_FILES["file"]["name"]));if ((($_FILES["file"]["type"] == "image/gif")|| ($_FILES["file"]["type"] == "image/jpeg")|| ($_FILES["file"]["type"] == "image/jpg")|| ($_FILES["file"]["type"] == "image/pjpeg")|| ($_FILES["file"]["type"] == "image/x-png")|| ($_FILES["file"]["type"] == "image/png"))&& ($_FILES["file"]["size"] < 20000)&& in_array($extension, $allowedExts)) { if ($_FILES["file"]["error"] > 0)  {  echo "Return Code: " . $_FILES["file"]["error"] . "
";  } else  {  echo "Upload: " . $_FILES["file"]["name"] . "
";  echo "Type: " . $_FILES["file"]["type"] . "
";  echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB
";  echo "Temp file: " . $_FILES["file"]["tmp_name"] . "
";  if (file_exists("upload/" . $_FILES["file"]["name"]))   {   echo $_FILES["file"]["name"] . " already exists. ";   }  else   {   move_uploaded_file($_FILES["file"]["tmp_name"],   "upload/" . $_FILES["file"]["name"]);   echo "Stored in: " . "upload/" . $_FILES["file"]["name"];   }  } }else { echo "Invalid file"; }?>

I hope this article will help you with php programming.