File Upload


PHP provides simple way to upload files to server.

Upload-Form


upload_design.php
<html>
<body>

<form action="upload_file.php" method="post" enctype="multipart/form-data">
<label for="file">Upload:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>

</body>
</html>
enctype="multipart/form-data" creates both a binary and an ascii upload but it will generate extra weight to carry around for every request to your programs.

Restrictions on Upload


upload_file.php
<?php
$allowExts = array("gif", "jpeg", "jpg", "png");
$tempf = explode(".", $_FILES["file"]["name"]);
$ext = end($tempf);
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"))
&& ($_FILES["file"]["size"] < 20000)
&& in_array($ext, $allowExts))
  {
  if ($_FILES["file"]["error"] > 0)
    {
    echo "Error: " . $_FILES["file"]["error"] . "<br>";
    }
  else
    {
    echo "Upload: " . $_FILES["file"]["name"] . "<br>";
    echo "Type: " . $_FILES["file"]["type"] . "<br>";
    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
    echo "Stored in: " . $_FILES["file"]["tmp_name"];
    }
  }
else
  {
  echo "Invalid file";
  }
?>
Output :
file upload image

Upload: Form.png
Type: image/x-png
Size: 4.0322265625 kB
Temp file: C:\xampp\tmp\phpF4C1.tmp

Note :
In upload_file.php , function use for :

explode() :This function use to split a string by string.

end() : This function use to set the internal pointer of an array to its last element.