php实现压缩多个CSS与JS文件的方法，
本文实例讲述了php实现压缩多个CSS与JS文件的方法。分享给大家供大家参考。具体实现方法如下：
1. 压缩css
复制代码 代码如下:
header('Content-type: text/css');
ob_start("compress");
function compress($buffer) {
/* remove comments */
$buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
/* remove tabs, spaces, newlines, etc. */
$buffer = str_replace(array("\r\n", "\r", "\n", "\t", ' ', ' ', ' '), '', $buffer);
return $buffer;
}
/* your css files */
include('galleria.css');
include('articles.css');
ob_end_flush();
使用方法如下:
复制代码 代码如下:
test
2. 压缩js,利用jsmin类:
本实例源自:http://code.google.com/p/minify/
复制代码 代码如下:
header('Content-type: text/javascript');
require 'jsmin.php';
echo JSMin::minify(file_get_contents('common.js') . file_get_contents('common2.js'));
其中jsmin.php文件如下：
复制代码 代码如下:
/**
* jsmin.php - PHP implementation of Douglas Crockford's JSMin.
*
* This is pretty much a direct port of jsmin.c to PHP with just a few
* PHP-specific performance tweaks. Also, whereas jsmin.c reads from stdin and
* outputs to stdout, this library accepts a string as input and returns another
* string as output.
*
* PHP 5 or higher is required.
*
* Permission is hereby granted to use this version of the library under the
* same terms as jsmin.c, which has the following license:
*
* --
* Copyright (c) 2002 Douglas Crockford (www.crockford.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* The Software shall be used for Good, not Evil.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* --
*
* @package JSMin
* @author Ryan Grove
* @copyright 2002 Douglas Crockford
* @copyright 2008 Ryan Grove
* @copyright 2012 Adam Goforth
* @license http://opensource.org/licenses/mit-license.php MIT License
* @version 1.1.2 (2012-05-01)
* @link https://github.com/rgrove/jsmin-php
*/
class JSMin {
const ORD_LF = 10;
const ORD_SPACE = 32;
const ACTION_KEEP_A = 1;
const ACTION_DELETE_A = 2;
const ACTION_DELETE_A_B = 3;
protected $a = '';
protected $b = '';
protected $input = '';
protected $inputIndex = 0;
protected $inputLength = 0;
protected $lookAhead = null;
protected $output = '';
// -- Public Static Methods --------------------------------------------------
/**
* Minify Javascript
*
* @uses __construct()
* @uses min()
* @param string $js Javascript to be minified
* @return string
*/
public static function minify($js) {
$jsmin = new JSMin($js);
return $jsmin->min();
}
// -- Public Instance Methods ------------------------------------------------
/**
* Constructor
*
* @param string $input Javascript to be minified
*/
public function __construct($input) {
$this->input = str_replace("\r\n", "\n", $input);
$this->inputLength = strlen($this->input);
}
// -- Protected Instance Methods ---------------------------------------------
/**
* Action -- do something! What to do is determined by the $command argument.
*
* action treats a string as a single character. Wow!
* action recognizes a regular expression if it is preceded by ( or , or =.
*
* @uses next()
* @uses get()
* @throws JSMinException If parser errors are found:
* - Unterminated string literal
* - Unterminated regular expression set in regex literal
* - Unterminated regular expression literal
* @param int $command One of class constants:
* ACTION_KEEP_A Output A. Copy B to A. Get the next B.
* ACTION_DELETE_A Copy B to A. Get the next B. (Delete A).
* ACTION_DELETE_A_B Get the next B. (Delete B).
*/
protected function action($command) {
switch($command) {
case self::ACTION_KEEP_A:
$this->output .= $this->a;
case self::ACTION_DELETE_A:
$this->a = $this->b;
if ($this->a === "'" || $this->a === '"') {
for (;;) {
$this->output .= $this->a;
$this->a = $this->get();
if ($this->a === $this->b) {
break;
}
if (ord($this->a)
throw new JSMinException('Unterminated string literal.');
}
if ($this->a === '\\') {
$this->output .= $this->a;
$this->a = $this->get();
}
}
}
case self::ACTION_DELETE_A_B:
$this->b = $this->next();
if ($this->b === '/' && (
$this->a === '(' || $this->a === ',' || $this->a === '=' ||
$this->a === ':' || $this->a === '[' || $this->a === '!' ||
$this->a === '&' || $this->a === '|' || $this->a === '?' ||
$this->a === '{' || $this->a === '}' || $this->a === ';' ||
$this->a === "\n" )) {
$this->output .= $this->a . $this->b;
for (;;) {
$this->a = $this->get();
if ($this->a === '[') {
/*
inside a regex [...] set, which MAY contain a '/' itself. Example: mootools Form.Validator near line 460:
return Form.Validator.getValidator('IsEmpty').test(element) || (/^(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]\.?){0,63}[a-z0-9!#$%&'*+/=?^_`{|}~-]@(?:(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)*[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\])$/i).test(element.get('value'));
*/
for (;;) {
$this->output .= $this->a;
$this->a = $this->get();
if ($this->a === ']') {
break;
} elseif ($this->a === '\\') {
$this->output .= $this->a;
$this->a = $this->get();
} elseif (ord($this->a)
throw new JSMinException('Unterminated regular expression set in regex literal.');
}
}
} elseif ($this->a === '/') {
break;
} elseif ($this->a === '\\') {
$this->output .= $this->a;
$this->a = $this->get();
} elseif (ord($this->a)
throw new JSMinException('Unterminated regular expression literal.');
}
$this->output .= $this->a;
}
$this->b = $this->next();
}
}
}
/**
* Get next char. Convert ctrl char to space.
*
* @return string|null
*/
protected function get() {
$c = $this->lookAhead;
$this->lookAhead = null;
if ($c === null) {
if ($this->inputIndex inputLength) {
$c = substr($this->input, $this->inputIndex, 1);
$this->inputIndex += 1;
} else {
$c = null;
}
}
if ($c === "\r") {
return "\n";
}
if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) {
return $c;
}
return ' ';
}
/**
* Is $c a letter, digit, underscore, dollar sign, or non-ASCII character.
*
* @return bool
*/
protected function isAlphaNum($c) {
return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1;
}
/**
* Perform minification, return result
*
* @uses action()
* @uses isAlphaNum()
* @uses get()
* @uses peek()
* @return string
*/
protected function min() {
if (0 == strncmp($this->peek(), "\xef", 1)) {
$this->get();
$this->get();
$this->get();
}
$this->a = "\n";
$this->action(self::ACTION_DELETE_A_B);
while ($this->a !== null) {
switch ($this->a) {
case ' ':
if ($this->isAlphaNum($this->b)) {
$this->action(self::ACTION_KEEP_A);
} else {
$this->action(self::ACTION_DELETE_A);
}
break;
case "\n":
switch ($this->b) {
case '{':
case '[':
case '(':
case '+':
case '-':
case '!':
case '~':
$this->action(self::ACTION_KEEP_A);
break;
case ' ':
$this->action(self::ACTION_DELETE_A_B);
break;
default:
if ($this->isAlphaNum($this->b)) {
$this->action(self::ACTION_KEEP_A);
}
else {
$this->action(self::ACTION_DELETE_A);
}
}
break;
default:
switch ($this->b) {
case ' ':
if ($this->isAlphaNum($this->a)) {
$this->action(self::ACTION_KEEP_A);
break;
}
$this->action(self::ACTION_DELETE_A_B);
break;
case "\n":
switch ($this->a) {
case '}':
case ']':
case ')':
case '+':
case '-':
case '"':
case "'":
$this->action(self::ACTION_KEEP_A);
break;
default:
if ($this->isAlphaNum($this->a)) {
$this->action(self::ACTION_KEEP_A);
}
else {
$this->action(self::ACTION_DELETE_A_B);
}
}
break;
default:
$this->action(self::ACTION_KEEP_A);
break;
}
}
}
return $this->output;
}
/**
* Get the next character, skipping over comments. peek() is used to see
* if a '/' is followed by a '/' or '*'.
*
* @uses get()
* @uses peek()
* @throws JSMinException On unterminated comment.
* @return string
*/
protected function next() {
$c = $this->get();
if ($c === '/') {
switch($this->peek()) {
case '/':
for (;;) {
$c = $this->get();
if (ord($c)
return $c;
}
}
case '*':
$this->get();
for (;;) {
switch($this->get()) {
case '*':
if ($this->peek() === '/') {
$this->get();
return ' ';
}
break;
case null:
throw new JSMinException('Unterminated comment.');
}
}
default:
return $c;
}
}
return $c;
}
/**
* Get next char. If is ctrl character, translate to a space or newline.
*
* @uses get()
* @return string|null
*/
protected function peek() {
$this->lookAhead = $this->get();
return $this->lookAhead;
}
}
// -- Exceptions ---------------------------------------------------------------
class JSMinException extends Exception {}
?>
希望本文所述对大家的php程序设计有所帮助。
热AI工具
Undresser.AI Undress
人工智能驱动的应用程序，用于创建逼真的裸体照片
AI Clothes Remover
用于从照片中去除衣服的在线人工智能工具。
Undress AI Tool
免费脱衣服图片
Clothoff.io
AI脱衣机
Video Face Swap
使用我们完全免费的人工智能换脸工具轻松在任何视频中换脸！
热门文章
热工具
螳螂BT
Mantis是一个易于部署的基于Web的缺陷跟踪工具，用于帮助产品缺陷跟踪。它需要PHP、MySQL和一个Web服务器。请查看我们的演示和托管服务。
DVWA
Damn Vulnerable Web App (DVWA) 是一个PHP/MySQL的Web应用程序，非常容易受到攻击。它的主要目标是成为安全专业人员在合法环境中测试自己的技能和工具的辅助工具，帮助Web开发人员更好地理解保护Web应用程序的过程，并帮助教师/学生在课堂环境中教授/学习Web应用程序安全。DVWA的目标是通过简单直接的界面练习一些最常见的Web漏洞，难度各不相同。请注意，该软件中
记事本++7.3.1
好用且免费的代码编辑器
MinGW - 适用于 Windows 的极简 GNU
这个项目正在迁移到osdn.net/projects/mingw的过程中，你可以继续在那里关注我们。MinGW：GNU编译器集合（GCC）的本地Windows移植版本，可自由分发的导入库和用于构建本地Windows应用程序的头文件；包括对MSVC运行时的扩展，以支持C99功能。MinGW的所有软件都可以在64位Windows平台上运行。
Dreamweaver CS6
视觉化网页开发工具
