本节分享的这段php代码，可用于显示与查看网页的源代码。
代码：
<?php
/**
* 显示与查看网页源代码
* edit：www.jb200.com
*/
// Page title
$pagetitle = 'Baumeister Mediasoft Engineering :: Resources :: '
.'PHP Application: Display/View Web Page Contents/Source'
;
// Messages
$fmturl = '<p style="margin:0px;">"%s" contents/source:</p>'."n";
$nosource = '<span style="color:red;">* empty / not found *</span>';
// Form parameters
$url = isset($_REQUEST['url']) ? $_REQUEST['url'] : '';
$dowrap = isset($_REQUEST['wrapsource']) && !empty($_REQUEST['wrapsource']) && ($_REQUEST['wrapsource'] == 'on') ? 1 : 0;
?>
<html>
<head>
<title><?php echo $pagetitle;?></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body style="background-color:#cfcfcf;font-family:Arial;sans-serif;font-size:12px;">
<h3 style="font-size:13px;margin-bottom:0px;"><?php echo $pagetitle;?></h3>
<hr />
<form method="post" style="margin-top:4px;margin-bottom:4px;">
URL <input style="font-size:12px;" type="text" size="50"
name="url" value="<?php echo empty($url) ? 'http://' : $url;?>" />
<input style="font-size:12px;" type="checkbox"
name="wrapsource"<?php if ($dowrap) { echo ' checked="checked"';}?> />Wrap
<input style="font-size:12px;" type="submit" value="Go" />
</form>
<?php
if (!empty($url))
{
// Start web page output
echo '<hr />'."n";
// Display selected URL
echo sprintf($fmturl, $url);
// Enable URL-aware fopen wrappers to allow for URL file reading
if ((double)phpversion() >= 4.2)
{
ini_set('allow_url_fopen', '1');
}
// Read file
$s = @file_get_contents($url);
if (empty($s))
{
// Web page empty/access failure
echo $nosource;
}
else
{
// Display web page contents/source using form/textarea
?>
<form name="_webpagesource_" style="margin-bottom:0px;">
<script type="text/javascript" language="JavaScript">
<!--
// Display select all button
document.write('<input style="font-size:12px;" type="button" value="Select All"'
+ ' onclick="document.forms['_webpagesource_']['_src_'].select();"'
+ ' />'
);
//-->
</script>
<table width="100%" height="80%" border="0" cellspacing="0" cellpadding="0"><tr>
<td style="vertical-align:top;">
<textarea id="_src_" style="width:100%;height:100%;"
wrap="<?php echo $dowrap ? 'virtual' : 'off';?>">
<?php echo htmlspecialchars($s);?>
</textarea>
</td>
</tr></table>
</form>
<?php
}
}
?>
<hr />
<p style="margin:0px;font-size:9px;color:#666666;">
Copyright © 2013-<?php echo date('Y');?>
by <a href="http://www.jb200.com" target="_top">脚本学堂，欢迎您。</a>
</p>
</body>
</html>
调用示例：
