Performing file uploads without checking errors - PHP

Welcome to the third chapter of the series “Building file uploaders with PHP 5.” Comprised of five approachable tutorials, this series teaches you the fundamentals of constructing file uploading applications with PHP 5. It also complements the corresponding theoretical concepts with numerous hands-on examples. In this third tutorial of the series, I’m going to show you how to incorporate a brand new error checking module into the file uploading PHP script created in the last article.

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By: Alejandro Gervasio

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April 02, 2008

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If you're anything like me, then you'll feel curious about how to include an effective error checking mechanism inside the file uploading script that I built in the preceding article of this series. Thus, let me quickly show you the complete source code of this application, including the corresponding web form that permits users to browse files in their respective client machines.

Here are the source files that comprise the file uploading application:

(definition of 'upload_form.htm' file)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<head>

<title>Uploading files with PHP</title>

body{

padding: 0;

margin: 0;

background: #fff;

}

h1{

font: bold 16pt Arial, Helvetica, sans-serif;

color: #000;

text-align: center;

}

font: normal 10pt Arial, Helvetica, sans-serif;

color: #000;

}

form{

display: inline;

}

#formcontainer{

width: 50%;

padding: 10px;

margin-left: auto;

margin-right: auto;

background: #eee;

border: 1px solid #666;

}

</style>

</head>

<body>

<h1>Uploading files with PHP</h1>

<p>File to upload <input name="userfile" type="file" />

</form>

</div>

</body>

</html>

(definition of 'upload_file.php' file)

if($_POST['send']){

// set upload directory (for Windows users)

$uploadDir='C:uploaded_files';

// set destination of uploaded file

$uploadFile=$uploadDir.basename($_FILES['userfile']['name']);

if(move_uploaded_file($_FILES['userfile']['tmp_name'],$uploadFile)){

echo 'The target file was successfully uploaded!<br />';

echo 'Name of uploaded file: '.$_FILES['userfile']['name'].'.<br />';

echo 'MIME type of uploaded file: '.$_FILES['userfile']['type'].'.<br />';

echo 'Size of uploaded file: '.$_FILES['userfile']['size'].' bytes.<br />';

echo 'Temporary name of uploaded file: '.$_FILES['userfile']['tmp_name'].'<br />';

}

else{

echo 'Error uploading target file!';

}

As you'll possibly recall, the two source files listed above are all that you need to build a simple file uploading application with PHP that has the capacity to display relevant data about the file uploaded. Not too difficult to grasp, right?

Well, at this point, I showed you how to create a basic file uploading system by using a couple of simple source files. So the next thing that I'm going to teach you will be how to incorporate an effective error checking module into the system in question, which will extend its existing functionality.

Want to see how this will be done? Great! Click on the link below and keep reading.

Next: Creating an effective error handling module >>