Ryan's Bliggity Blog: PHP

Thursday, November 02, 2006

PHP Gas Mileage Application

Here's a little something I wrote out of necessity and decided not to stop before it was completed. I'm pretty proud of it and am surprised how easy PHP was to learn. It basically helps me keep track of my gas mileage over the web so I can throw the receipt out faster, and don't have to carry a spreadsheet around. The following is from the program itself:

This program is a gas mileage database and analyzer written in PHP. It is self-contained (has a single source code file). It stores data in a simple text file in HTTP-query format. It allows users to add new records, and add new data files for different vehicles. It creates a backup before a new record is added. It also implements password protection before users can add refueling records.

Source Code:
Source Code
See it in action

Saturday, October 28, 2006

Simple Web File Upload Form

I put the following form and post processing files together from a manual on PHP. The HTML could really be embedded in the PHP file, but this might be better if you only want one copy of the PHP code on the system. Modify both to fit your environment and make sure the PHP file is executable.

Example .HEADER.html

<br /><h1>Index of /srv/pub</h1>
<br />
<br /><a href="/">Back to Welcome Page</a><br>
<br /><br>
<br />This form allows you to upload a file of up to 10 MiB:
<br />
<br /><!-- The data encoding type, enctype, MUST be specified as below -->
<br /><form enctype="multipart/form-data" action="/cgi-bin/getfile.php" 
<br />method="POST">
<br />    <input type="hidden" name="dest_dir" value="/srv/pub/" />
<br />    <!-- MAX_FILE_SIZE must precede the file input field -->
<br />    <input type="hidden" name="MAX_FILE_SIZE" value="1000000000" />
<br />    <!-- Name of input element determines name in $_FILES array -->
<br />    Send this file: <input name="userfile" type="file" />
<br />    <input type="submit" value="Send File" />
<br /></form>
<br />
<br />

Example getfile.php

<br /><html>
<br /><head>
<br /><title>File Upload</title>
<br /></head>
<br /><body>
<br />
<br /><h1>File Upload</h1>
<br />
<br /><?php
<br />// In PHP versions earlier than 4.1.0, $HTTP_POST_FILES should be used instead
<br />// of $_FILES.
<br />
<br />//$uploaddir = '/var/www/srv/Public/';
<br />$uploaddir = $_POST['dest_dir'];
<br />$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);
<br />
<br />echo '<pre>';
<br />echo "Trying to save to: ".$uploadfile."\n";
<br />
<br />if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
<br />   chmod($uploadfile, 0644);
<br />   echo "File is valid, and was successfully uploaded.\n\n";
<br />   echo "Saved in: ".$uploaddir."\n";
<br />   echo "Note that this program sets the file permissions to 0644.\n";
<br />
<br />   echo "<a href=\"javascript:history.go(-1)\">Click Here to Continue.</a>\n";
<br />
<br />} else {
<br />   echo "File upload failed.\n";
<br />     switch ($_FILES['uploadFile']['error'])
<br />     { case 1:
<br />         print '<p> The file is bigger than this PHP installation allows</p>';
<br />         break;
<br />       case 2:
<br />         print '<p> The file is bigger than this form allows</p>';
<br />         break;
<br />       case 3:
<br />         print '<p> Only part of the file was uploaded</p>';
<br />         break;
<br />       case 4:
<br />         print '<p> No file was uploaded</p>';
<br />         break;
<br />     }
<br />}
<br />
<br />echo "<br><br>Here is some more debugging info:\n<br>\n";
<br />print_r($_FILES);
<br />
<br />print "</pre>";
<br />
<br />?>
<br />

This code is derived from a few examples.