Page 522 - Beginning PHP 5.3
P. 522
Part III: Using PHP in Practice
span.required { display: none; }
</style>
</head>
<body>
<h1>How many days old are you?</h1>
<?php
require_once( “HTML/QuickForm.php” );
require_once( “HTML/QuickForm/Renderer/Tableless.php” );
$form = new HTML_QuickForm( “form”, “get”, “days_old.php”, “”,
array( “style” => “width: 30em;” ), true );
$form->removeAttribute( “name” );
$form->setRequiredNote( “” );
$options = array( format => “MdY”, “minYear” => 1902, “maxYear” =>
date(“Y”) );
$form->addElement( “date”, “dateOfBirth”, “Your date of birth”, $options );
$form->addElement( “submit”, “calculateButton”, “Calculate” );
$form->addGroupRule( “dateOfBirth”, “Please enter your date of birth”,
“required” );
$form->addRule( “dateOfBirth”, “Please enter a valid date”, “callback”,
“checkDateOfBirth” );
if ( $form->isSubmitted() and $form->validate() ) {
$form->process( “calculateDays” );
}
$renderer = new HTML_QuickForm_Renderer_Tableless();
$form->accept( $renderer );
echo $renderer->toHtml();
function checkDateOfBirth( $value ) {
return checkdate( $value[“M”], $value[“d”], $value[“Y”] );
}
function calculateDays( $values ) {
$currentDate = mktime();
$dateOfBirth = mktime( 0, 0, 0, $values[“dateOfBirth”][“M”],
$values[“dateOfBirth”][“d”], $values[“dateOfBirth”][“Y”] );
$secondsOld = $currentDate - $dateOfBirth;
$daysOld = (int) ( $secondsOld / 60 / 60 / 24 );
echo “<p>You were born on “ . date( “l, F jS, Y”, $dateOfBirth ) . “.</p>”;
echo “<p>You are “ . number_format( $daysOld ) . “ day” . ( $daysOld != 1 ?
“s” : “” ) . “ old!</p>”;
}
?>
</body>
</html>
Now run the days_old.php script by visiting its URL in your Web browser. You should see a form
with three menus for choosing the month, day, and year of your date of birth. Enter your date of birth
and click Calculate to display your age in days. Figure 16-2 shows the script in action.
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