PHP Source Code: fwrite.php
<?php
//----------------------------------------------------------
// The Web Language Project
// Mark Brautigam
// May-June 2015
// http://www.mixed-up.com/markb/
//----------------------------------------------------------
include "common.php";
headers1();
headers2();
echo sidebar("php", "fwrite", "php");
?>
<div id="content">
<h2>PHP: Form Handling and Write to File</h2>
<?php
draw_form ();
if (isset ($_POST['submit']) && formHasData($_POST)) {
draw_feedback ($_POST);
// Append these values to the data file as one line
// with the values separated by vertical bars: |
//
$fp = fopen ("../data/courses.txt", "a");
fwrite ($fp, "{$_POST['college']}|{$_POST['dept']}|{$_POST['course']}|{$_POST['desc']}\n");
fclose ($fp);
}
?>
<p><a href='fread.php'>Show the contents of this file »</a></p>
<p><a href='source.php?f=3'>Show PHP source code »</a>
</div>
<?php
footers();
//-------------------------------------------------------------
function draw_feedback ($post)
//-------------------------------------------------------------
{
// Draw the HTML table that shows what values they wrote
//
echo "<p>The following data was entered in the data file: </p>\n";
echo "<table class='results'>\n";
echo " <tr><td>College:</td><td>{$post['college']}</td></tr>\n";
echo " <tr><td>Department:</td><td>{$post['dept']}</td></tr>\n";
echo " <tr><td>Course #:</td><td>{$post['course']}</td></tr>\n";
echo " <tr><td>Course name:</td><td>{$post['desc']}</td></tr>\n";
echo "</table>\n";
}
//-------------------------------------------------------------
function formHasData ($p)
//-------------------------------------------------------------
{
$formFields = array ( 'college', 'dept', 'course', 'desc' );
for ($i=0, $n=count($formFields); $i<$n; $i++) {
if (isset($p[$formFields[$i]]) && trim($p[$formFields[$i]]) != "")
return true;
}
return false;
}
//-------------------------------------------------------------
function draw_form ()
//-------------------------------------------------------------
{ ?>
<form name='coursesform' action='fwrite.php' method='POST'>
<fieldset>
<legend>Add a course</legend>
<table>
<tr><td>College:</td><td><input type='text' name='college' /></td></tr>
<tr><td>Department:</td><td><input type='text' name='dept' /></td></tr>
<tr><td>Course #:</td><td><input type='text' name='course' /></td></tr>
<tr><td>Course name:</td><td><input type='text' name='desc' /></td></tr>
<tr><td></td><td><input type='submit' id='submit' name='submit' value='Add' /></td></tr>
</table>
</fieldset>
</form>
<?php
}
?>