<html> <head> <!--coded by: harsha send your comments to: nharsha@lycos.com--> <title>php and html forms and interaction between them</title> </head> <body> <?
/* Parent if statement checking the if $HTTP_POST_VARS['submit'] is true or not and if it is true it proceeds futher for the execution of the inner statements in it
$HTTP_POST_VARS is an php variable where the form elements are stored in it as array elements
here we have three form variables:
name field:$name -------> the value of this is stored as an array element $HTTP_POST_VARS['name']
subject field: $subject -------> the value of this is stored as an array element $HTTP_POST_VARS['subject']
message field: $message -------> the value of this is stored as an array element $HTTP_POST_VARS['message']
submit button: $submit -------> the value of this is stored as an array element $HTTP_POST_VARS['submit'] (here in the sumit the value stored is either 1 or 0)
note:instead of $HTTP_POST_VARS['SUBMIT'] we can use the following code: say instead of using ......... if($HTTP_POST_VARS['submit']) ...... we can use ......... if(isset==$submit||$submit == "add") */
if($HTTP_POST_VARS['submit']){
//note that empty() is an built in function
//below if statement checks the whether name feild is empty or not if(empty($name)){ echo "<font color=\"red\" size=\"+2\">Please enter your name!!</font><br>"; }
//below if statement checks the subject feild if(empty($subject)){ echo "<font color=\"red\" size=\"+2\">The subject feild is empty!!</font><br>"; }
//below if statement checks the message feild if(empty($message)){ echo "<font color=\"red\" size=\"+2\">You did not enter the message!!</font><br>"; }
//this is an important statement it uses negetive condition /*That is IF NAME "AND" SUBJECT "AND" MESSAGE IS "NOT" EMPTY THEN PROCEED FURTHER*/
//htmlspecialchar disables the html input $new_name=htmlspecialchars($name);
//nl2br function converts newline character to break of html $new_message=nl2br($message);
/*note that these htmlspecialchars and nl2br are the built in functons of php language*/ echo "<font color=\"red\" size=\"+2\">Thank you very much</font><br>"; echo "<br>".$new_name."<br>".$subject."<br>".$new_message;
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