鬼の领地

<?php
$script = stripslashes($_REQUEST['script']);
if ($script !== false) {
	$ftest = fopen("script_test.php", "wb");
	fwrite($ftest, $script);
	fclose($ftest);
}
?>
<?php if ($_REQUEST['ret'] == 'js') : ?>
<script language="javascript">
parent.document.getElementById('show_test').contentWindow.location.reload();
</script>
<?php else : ?>
<style>textarea { width: 100%; height: 400px; }</style>
<table width="100%">
<tr valign="top"><td width="50%">
<form action="?ret=js" method="POST" target="submit_iframe">
<textarea id="script" name="script">
<?php if ($script !== false) : ?><?= $script ?><?php endif; ?>
</textarea><br />
<input type="submit" value="Test" />
</form></td>
<td width="50%"><?php if ($script !== false) : ?>
<iframe id="show_test" src="script_test.php"
 style="border: 1px black solid; width: 100%; height: 400px;"></iframe>
<?php endif; ?>
</td></tr></table>
<iframe id="submit_iframe" name="submit_iframe" style="display: none;"></iframe>
<?php endif; ?>