Page 284 - Beginning PHP 5.3

Part III: Using PHP in Practice
Finally, try filling in all the required fields and clicking Send Details again. This time, you should see
the thank-you message.

Figure 9-7
How It Works
The script kicks off with the standard XHTML page header. It includes an additional CSS class for the
red error boxes:

<style type=”text/css”>
.error { background: #d33; color: white; padding: 0.2em; }
</style>

Next, the script checks to see if the form has been submitted. It does this by looking for the existence
of the submitButton field. If present, it means that the Send Details button has been clicked and the
form received, and the script calls a processForm() function to handle the form data. However, if
the form hasn’t been displayed, it calls displayForm() to display the blank form, passing in an
empty array (more on this in a moment):

if ( isset( $_POST[“submitButton”] ) ) {
processForm();
} else {
displayForm( array() );
}

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