Issue 129 : Minify HTML page by prepending pageBuffer.php. Kind of a souped up http://www.mnot.net/cgi_buffer/

min/pageBuffer.php

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+<?php
+/**
+ * Include for serving HTML pages through Minify
+ * 
+ * DO NOT EDIT! Configure this utility via pageConfig.php
+ * 
+ * @package Minify
+ */
+
+$_min_preIncludedFiles = get_included_files();
+
+function ob_minify_page($content) {
+    global $min_serveOptions, $min_cacheMaxAge;
+
+    $includedFiles = array_diff(
+        $GLOBALS['_min_preIncludedFiles'], get_included_files()
+    );
+    $includedFiles[] = realpath($_SERVER['SCRIPT_FILENAME']);
+    $mtime = 0;
+    foreach ($includedFiles as $file) {
+        $mtime = max($mtime, filemtime($file));
+    }
+
+    define('MINIFY_MIN_DIR', dirname(__FILE__));
+
+    // load config
+    require MINIFY_MIN_DIR . '/pageConfig.php';
+
+    // setup include path
+    set_include_path($min_libPath . PATH_SEPARATOR . get_include_path());
+
+    require $min_libPath . '/Minify.php';
+
+    Minify::$uploaderHoursBehind = $min_uploaderHoursBehind;
+    Minify::setCache(
+        isset($min_cachePath) ? $min_cachePath : ''
+        ,$min_cacheFileLocking
+    );
+
+    if ($min_errorLogger) {
+        require_once $min_libPath . '/Minify/Logger.php';
+        if (true === $min_errorLogger) {
+            require_once $min_libPath . '/FirePHP.php';
+            Minify_Logger::setLogger(FirePHP::getInstance(true));
+        } else {
+            Minify_Logger::setLogger($min_errorLogger);
+        }
+    }
+
+    // some array keys may already be set in globals
+    $min_serveOptions['id'] = $_SERVER['SCRIPT_FILENAME'];
+    $min_serveOptions['content'] = $content;
+    $min_serveOptions['lastModified'] = $mtime;
+    $min_serveOptions['minifyAll'] = true;
+    $min_serveOptions['quiet'] = true;
+
+    // page option: $min_lastModified
+    if (isset($GLOBALS['min_lastModified'])) {
+        $min_serveOptions['lastModified'] = $GLOBALS['min_lastModified'];
+    }
+
+    if ($min_cacheMaxAge) {
+        $min_serveOptions['lastModified'] = _steppedTime(
+            $min_cacheMaxAge, $_SERVER['SCRIPT_FILENAME']);
+    }
+
+    $out = Minify::serve('Page', $min_serveOptions);
+
+    foreach ($out['headers'] as $prop => $value) {
+        header($prop === '_responseCode' ? $value : "{$prop}: {$value}");
+    }
+    return $out['content'];
+}
+
+/**
+ * Get a stepped version of time with a random-like constistent offset
+ *
+ * This emulates the mtime() of a file being modified regularly. The offset
+ * allows you to use the same period in several instances without them all
+ * stepping up simultaneously. Offsets should be evenly distributed.
+ *
+ * @param int $period in seconds
+ * @param string $instanceId
+ * @return int
+ */
+function _steppedTime($period, $instanceId = '') {
+    $hashInt = hexdec(substr(md5($instanceId), 0, 8));
+    $t = $_SERVER['REQUEST_TIME'];
+    return $t - ($t % $period) - ($hashInt % $period);
+}
+
+ob_start('ob_minify_page');

min/pageConfig.php

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+<?php
+/**
+ * Configuration for pageBuffer.php
+ * @package Minify
+ */
+
+
+/**
+ * Set to true to log messages to FirePHP (Firefox Firebug addon).
+ * Set to false for no error logging (Minify may be slightly faster).
+ * @link http://www.firephp.org/
+ *
+ * If you want to use a custom error logger, set this to your logger 
+ * instance. Your object should have a method log(string $message).
+ *
+ * @todo cache system does not have error logging yet.
+ */
+$min_errorLogger = false;
+
+
+/**
+ * For best performance, specify your temp directory here. Otherwise Minify
+ * will have to load extra code to guess. Some examples below:
+ */
+//$min_cachePath = 'c:\\WINDOWS\\Temp';
+//$min_cachePath = '/tmp';
+//$min_cachePath = preg_replace('/^\\d+;/', '', session_save_path());
+
+
+/**
+ * Cache file locking. Set to false if filesystem is NFS. On at least one 
+ * NFS system flock-ing attempts stalled PHP for 30 seconds!
+ */
+$min_cacheFileLocking = true;
+
+
+/**
+ * Maximum age of browser cache in seconds. After this period, the browser
+ * will send another conditional GET. Use a longer period for lower traffic
+ * but you may want to shorten this before making changes if it's crucial
+ * those changes are seen immediately.
+ */
+$min_serveOptions['maxAge'] = 1800;
+
+
+/**
+ * By default Minify will check the mtime of the loaded page and any pages it
+ * includes to determine the last modified time. If you would rather have it
+ * regularly rebuild the cache, set this to the period, in seconds, that the
+ * cache should be rebuilt (note this only occurs if a request is made).
+ */
+$min_cacheMaxAge = false;
+
+
+/**
+ * If you upload files from Windows to a non-Windows server, Windows may report
+ * incorrect mtimes for the files. This may cause Minify to keep serving stale 
+ * cache files when source file changes are made too frequently (e.g. more than
+ * once an hour).
+ * 
+ * Immediately after modifying and uploading a file, use the touch command to 
+ * update the mtime on the server. If the mtime jumps ahead by a number of hours,
+ * set this variable to that number. If the mtime moves back, this should not be 
+ * needed.
+ *
+ * In the Windows SFTP client WinSCP, there's an option that may fix this 
+ * issue without changing the variable below. Under login > environment, 
+ * select the option "Adjust remote timestamp with DST".
+ * @link http://winscp.net/eng/docs/ui_login_environment#daylight_saving_time
+ */
+$min_uploaderHoursBehind = 0;
+
+
+/**
+ * Path to Minify's lib folder. If you happen to move it, change 
+ * this accordingly.
+ */
+$min_libPath = dirname(__FILE__) . '/lib';
+
+
+// try to disable output_compression (may not have an effect)
+ini_set('zlib.output_compression', '0');

min/test/pageBuffer.php

@@ -0,0 +1,96 @@
+<?php
+require '../pageBuffer.php';
+?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" >
+<head>
+    <!-- comments get removed -->
+	<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
+	<meta name="author" content="Dave Shea" />
+	<!-- also whitespace around block or undisplayed elements -->
+	<meta name="keywords" content="design, css, cascading, style, sheets, xhtml, graphic design, w3c, web standards, visual, display" />
+	<meta name="description" content="A demonstration of what can be accomplished visually through CSS-based design." />
+	<meta name="robots" content="all" />
+	<title>css Zen Garden: The Beauty in CSS Design</title>
+
+	<!-- to correct the unsightly Flash of Unstyled Content. http://www.bluerobot.com/web/css/fouc.asp -->
+	<script type="text/javascript"><!--
+// js comment inside SCRIPT element
+var is = {
+    ie:      navigator.appName == 'Microsoft Internet Explorer',
+    java:    navigator.javaEnabled(),
+    ns:      navigator.appName == 'Netscape',
+    ua:      navigator.userAgent.toLowerCase(),
+    version: parseFloat(navigator.appVersion.substr(21)) || 
+             parseFloat(navigator.appVersion),
+    win:     navigator.platform == 'Win32'
+}
+is.mac = is.ua.indexOf('mac') >= 0;
+if (is.ua.indexOf('opera') >= 0) {
+    is.ie = is.ns = false;
+    is.opera = true;
+}
+if (is.ua.indexOf('gecko') >= 0) {
+    is.ie = is.ns = false;
+    is.gecko = true;
+}
+// --></script>
+<script type="text/javascript">
+ //<![CDATA[
+  var i = 0;
+  while  (++i < 10)
+  {
+    // ...
+  }
+ //]]>
+</script>
+<script type="text/javascript">
+ /* <![CDATA[ */ i = 1;  /* ]]> */
+</script>
+<script type="text/javascript">
+ (i < 1); /* CDATA needed */
+</script>
+    <!--[if IE 6]>
+    <style type="text/css">
+/*! copyright: you'll need CDATA for this < & */
+body {background:white;}
+    </style>
+    <![endif]-->
+	<style type="text/css" title="currentStyle" media="screen">
+		@import "/001/001.css";
+/*\*/ css hack {} /*  */
+/* normal CSS comment */
+/*/*/ css hack {} /*  */
+css hack {
+    display/**/:/**/none;
+    display:none;
+}
+	</style>
+	<link
+		rel="alternate"
+		type="application/rss+xml"
+		title="RSS"
+		href="http://www.csszengarden.com/zengarden.xml" />
+</head>
+<body id="css-zen-garden">
+<!--[if !IE]>--><p>Browser != IE</p><!--<![endif]-->
+<div id="container">
+		<div id="pageHeader">
+			<h1><span>css Zen Garden</span></h1>
+			<h2><span>The Beauty of <acronym title="Cascading Style Sheets">CSS</acronym>
+Design</span></h2>
+		</div>
+		<pre>
+	White  space  is  important   here!
+		</pre>
+		<div id="quickSummary">
+			<p class="p1"><span>A demonstration of what can be accomplished visually through <acronym title="Cascading Style Sheets">CSS</acronym>-based design. Select any style sheet from the list to load it into this page.</span></p>
+			<p class="p2"><span>Download the sample <a href="/zengarden-sample.html" title="This page's source HTML code, not to be modified.">html file</a> and <a href="/zengarden-sample.css" title="This page's sample CSS, the file you may modify.">css file</a></span></p>
+		</div>
+        <textarea name="comment" id="comment" rows="6" class="maxwidth" cols="80">66666
+
+1234567890</textarea>
+
+</div>
+</body>
+</html>