<?php
if( $_GET['source'] ) {
highlight_file($_SERVER['SCRIPT_FILENAME']);
echo '<title>Source Code of ' . $_SERVER['SCRIPT_NAME'] . '</title>';
exit;
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Square _my_ Root toots!</title>
<style type="text/css">
<!--
.r {
font-weight: bold;
}
.i {
font-style: italic;
}
.p {
display: inline;
}
.e {
text-align: center;
background-color: #F66;
border: 2px solid #C00;
margin: 10px;
font-weight: bold;
padding: 2px 5px;
}
-->
</style>
</head>
<body>
<?php
if( $_POST["rootme"] ) {
if( is_numeric($_POST["r"]) ) {
if( $_POST["r"] < 0 ) {
if( abs($_POST["r"]) == 1 ) {
echo '<p>The Squared root of <span class="r">' . $_POST["r"] . '</span> is: ' . '<span class="i">i</span>' . "</p>\n";
} else {
echo '<p>The Squared root of <span class="r">' . $_POST["r"] . '</span> is: ' . sqrt(abs($_POST["r"])) . '<span class="i">i</span>' . "</p>\n";
}
} else {
echo '<p>The Squared root of <span class="r">' . $_POST["r"] . '</span> is: ' . sqrt($_POST["r"]) . "</p>\n";
}
} else {
if( $_POST["r"] ) {
echo '<div class="e"><p>Invalid Input</p></div>' . "\n";
} else {
echo '<p>The Squared root of <span class="r">nothing</span> is: <span class="i">nothing</span></p>' . "\n";
}
}
}
?>
<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<p class="p"><input name="r" type="text" id="r" /></p>
<p class="p"><input type="submit" name="rootme" value="square root?" /></p>
</form>
<p><a href="http://validator.w3.org/check?uri=referer" title="Valid XHTML 1.0 Strict">Valid XHTML 1.0 Strict</a> · <a href="http://jigsaw.w3.org/css-validator/check/referer" title="Valid CSS">Valid CSS</a> · <a href="<?php echo $_SERVER['PHP_SELF']; ?>?source=1" title="The SOURCE">Source Code</a></p>
</body>
</html>
Source Code of /tests/sqrt/sqrt.php