php实现压缩多个CSS与JS文件的方法
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2022-05-18 22:04:05
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:
使用方法如下:
<?php
/**
* 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 <ryan@wonko.com>
* @copyright 2002 douglas crockford <douglas@crockford.com> (jsmin.c)
* @copyright 2008 ryan grove <ryan@wonko.com> (php port)
* @copyright 2012 adam goforth <aag@adamgoforth.com> (updates)
* @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) <= self::ord_lf) {
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) <= self::ord_lf) {
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) <= self::ord_lf) {
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 < $this->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) <= self::ord_lf) {
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 $this->lookahead;
}
}
// -- exceptions ---------------------------------------------------------------
class jsminexception extends exception {}
?>
本文实例讲述了php实现压缩多个css与js文件的方法。分享给大家供大家参考。具体实现方法如下:
1. 压缩css
复制代码 代码如下:
<?php
header('content-type: text/css');
ob_start("compress");
function compress($buffer) {
/* remove comments */
$buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
/* remove tabs, spaces, newlines, etc. */
$buffer = str_replace(array("\r\n", "\r", "\n", "\t", ' ', ' ', ' '), '', $buffer);
return $buffer;
}
/* your css files */
include('galleria.css');
include('articles.css');
ob_end_flush();
header('content-type: text/css');
ob_start("compress");
function compress($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:
<link href="compress.php" rel="stylesheet" type="text/css" /><span id="tester">test</span>
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'));
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:
<?php
/**
* 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 <ryan@wonko.com>
* @copyright 2002 douglas crockford <douglas@crockford.com> (jsmin.c)
* @copyright 2008 ryan grove <ryan@wonko.com> (php port)
* @copyright 2012 adam goforth <aag@adamgoforth.com> (updates)
* @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) <= self::ord_lf) {
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) <= self::ord_lf) {
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) <= self::ord_lf) {
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 < $this->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) <= self::ord_lf) {
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。