据我了解你的问题是只有文件上传..所以我已经为你简要介绍了 php 和 html 文件..代码中有注释,我试图让事情变得简单。您可以通过注释了解有关代码的想法。任何更多的疑问都将不胜感激。
//This is the php code for upload file..
<?php
//allowedExts variable is an array consisting of file types that can be supported.we are uploading image so image file extensions are used.
$allowedExts = array("gif", "jpeg", "jpg", "png");
//explode function breaks the string, here used to get the file extension, whenever
//a dot(.) would be found in the filename,say abc.jpg, the extension jpg would be
//retrived.
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
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, $allowedExts))
{
//if any error in file, display it
if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
}
//else upload the file
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br>";
echo "Type: " . $_FILES["file"]["type"] . "<br>";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>";
//file will be uploaded in the upload directory..but also need to check whether
//the directory consists a same filename already or not..if it does contains
// a file say abc.jpg already..it would display the msg file already exist
if (file_exists("upload/" . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . " already exists. ";
}
//else it will upload it in upload directory, you can name the directory acc to you..
//but conventionally upload is used as the directory name
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"upload/" . $_FILES["file"]["name"]);
echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
}
}
}
else
{
echo "Invalid file";
}
?>
//php file ends here
//this is the html file..frame it according to wat u need
<html>
<body>
//the most important thing is that you should keep the
//enctype(encryption type)=multipart/form-data. This is mandatory for media files
<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>
</body>
</html>