Learn PHP for Free: 13 Jun 2011

Monday, 13 June 2011

Lesson 11PHP file upload.

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File upload to server computer is a very task to do in PHP to see how it happens lets see a example.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>File upload using PHP</title>
</head>
<?php
if(isset($_POST['submit']))
{
if(isset($_FILES['upload']['name']))
{
echo "<b>Attributes of file upload:</b><br/>";
echo "<b>File name:</b>" .$_FILES['upload']['name'];
echo "<br/><b>File type:</b>" .$_FILES['upload']['type'];
echo "<br/><b>File Size:</b>" .$_FILES['upload']['size']."bytes";
echo "<br/><b>File Temp:</b>" .$_FILES['upload']['tmp_name'];
echo "<br/><b>File error:</b>" .$_FILES['upload']['error'];

$path1 = $_FILES['upload']['tmp_name'];
$path2 = "uploaded_files/".$_FILES['upload']['name'];
if($_FILES['upload']['type']=="image/pjpeg" || $_FILES['upload']['type']=="image/gif" || $_FILES['upload']['type']=="text/plain" || $_FILES['upload']['type']=="application/x-php" || $_FILES['upload']['type']=="application/msword")
{
move_uploaded_file($path1,$path2);
echo "<br/>file uploaded to server.";
}
else
echo "<br/><b>select only jpeg,gif,text or php files to upload.</b>";
}
else
echo "No file choosed.";

}

?>
<body>
<form name="form" method="post" action="<?php echo $_SERVER['PHP_SELF'];?>" enctype="multipart/form-data">
<h1>File upload using PHP</h1>
<center>
<table>
<tr>
<td>Choose file</td><td><input type="file" name="upload" /></td>
</tr>

<tr><td> </td><td><input type="submit" name="submit" value="upload" /></td></tr>
</table>

</center>
</form>
</body>
</html>

1.Where uploaded file folder created at the server holds the user uploaded files.

2.To upload a file the HTML input type must be "file"

3. form enctype="multipart/form-data" must be set that shows that form data must be send as MIME file encoded as binary file.

4. Uploaded file parameters should use $_FILE global array to retrieve different file abstract

5. There are five different parameters associated with it. these are ,

file name

file type

file size

file tmp_name which is temporary storage of file uploaded to server.

file error.

what we to do simply move our file from temporary storage to path specified by the developer.

Lesson 10 file system using PHP.

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The task is to input a drive name ,folder name , file name, file contents and file extension from the user and save it into the server hard drive.we will learn some php file handling function here.
Program :
<?php
/*php file system scipt */
if(isset($_POST['submit'])) {
$errors=''; //an null string
if ($_POST['folder']=="") {
$errors.= "<li>Please give a folder name</li>";
}

if ($_POST['file]=="") {

$errors.= "<li>Please give a file name</li>";

}

if ($_POST['text]=="") {

$errors.= "<li>Please give a file contents</li>";

}

if ($errors=='') {
$path = $_POST['drive']."/".$_POST['folder'];
if (!file_eixsts( $path)) {
mkdir($path);
}
$file_path = $path."/".$_POST['file'].$_POST['ext'];

if (!file_eixsts( $file_path)) {
$fp = fopen($path,"w"); //opening file in write mode at the given path and return a pointer to it.
fwrite($fp,$_POST['text']); // writing file to directory
fclose($fp);
echo "Your file has benn saved.";
echo "<br/>";
}

else
echo "file exists already, try again";
}
else
echo "<ul>".$errors."</ul>";

?>

<html>
<head>
<title>PHP file handling</title>
</head>
<body>
<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="post" name="form"><
<center>
<table>
<tr>
<td>Drive name</td><td><select name="drive">
<option name="c:\">C:\</option>
<option name="d:\">D:\</option>
</select></td>
</tr>

<tr>
<td>Folder name</td><td><input type="text" name="folder" /></td>
</tr>

<tr>

</tr>

<tr>

<td>File contents</td><td><textarea name="text" cols="4" rows="15"></textarea></td>

</tr>

<tr>

</select></td>

</tr>

<tr>

</tr>

</table>
</center>
</form>
</body>
</html>

Learn PHP for Free

Monday, 13 June 2011

Lesson 11PHP file upload.

Lesson 10 file system using PHP.

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