00001 <?php
00020 function display_add_form($action, $message)
00021 {
00022 ?>
00023 <html>
00024 <head>
00025 <title>Add numbers form</title>
00026 </head>
00027 <body>
00028 <h3>Add two numbers:</h3>
00029 <?php echo $message; ?>
00030 <form action="<?php echo $action; ?>" method="GET">
00031 Number 1 : <input type="text" name="num1" value=""/> <br/>
00032 Number 2 : <input type="text" name="num2" value=""/> <br/>
00033 <input type="submit" name="submit1" value="Add"/> <br/>
00034 </form>
00035 <?php display_links(); ?>
00036 </body>
00037 </html>
00038 <?php
00039 }
00040
00041
00050 function check_and_get($variable1)
00051 {
00052 if(isset($_GET[$variable1]))
00053 return $_GET[$variable1];
00054 else
00055 die("$variable1 not passed as GET variable. Exiting <br/>\n");
00056 }
00057
00058
00064 function display_links()
00065 {
00066 echo "<h3>Related pages:</h3>\n";
00067 echo "<ol>\n";
00068 echo "<li><a href='index.php'>Add two numbers using two PHP pages. One page displays
00069 form and other adds values </a></li>\n";
00070 echo "<li><a href='add2.php'>Add two numbers using single PHP pages. Same page displays
00071 form and also adds values </a></li>\n";
00072 echo "<li><a href='add3.php'>Add two numbers using single PHP page. Now form is displayed
00073 even while displays sum so that next two numbers can be added easily.</a></li>\n";
00074 echo "</ol>\n";
00075 }
00076
00077
00078 ?>
