我做了一些环顾四周,但我仍然感到困惑。
我尝试过Crockford的JSMin,但是由于某种原因,Win XP无法解压缩可执行文件。
我真正想要的是一个简单易用的JS minifier,它使用PHP来缩小JS代码 - 并返回结果。
原因是因为: 我有2个文件(例如),我在它们之间工作:scripts.js和scripts_template.js
scripts_template是我写的普通代码 - 然后我必须缩小它并将缩小的脚本粘贴到scripts.js中 - 我实际上在我的网站上使用的那个。
我想通过在我的页面上做这样的事情来消灭中间人:
<script type="text/javascript" src="scripts.php"></script>
然后是scripts.php的内容:
<?php include("include.inc"); header("Content-type:text/javascript"); echo(minify_js(file_get_contents("scripts_template.js")));
这样,每当我更新我的JS时,我都不必经常访问网站来缩小它并将其重新粘贴到scripts.js中 - 所有内容都会自动更新。
是的,我也尝试过Crockford的PHP Minifier,我看了一下PHP Speedy,但我还不了解PHP类......那里有什么东西可以让猴子理解,也许是正则表达式?
我们如何让这更简单?
我只想删除制表符空间 - 我仍然希望我的代码可读。
这不像剧本使我的网站显得滞后,只是一切都比没有好。
删除标签,有人吗?如果可能的话,如何完全删除BLANK线?
答案 0 :(得分:23)
我在PHP implementation使用Douglas Crockford JSMin已经有一段时间了。连接文件时可能会有一点风险,因为在闭包结束时可能会丢失分号。
只要它比源文件更新,缓存缩小的输出并回显缓存的内容是个明智的想法。
require 'jsmin.php';
if(filemtime('scripts_template.js') < filemtime('scripts_template.min.js')) {
read_file('scripts_template.min.js');
} else {
$output = JSMin::minify(file_get_contents('scripts_template.js'));
file_put_contents('scripts_template.min.js', $output);
echo $output;
}
您也可以尝试JShrink。我之前从未使用过它,因为之前我没有遇到过JSMin的困难,但下面的代码应该可以解决问题。我没有意识到这一点,但JShrink需要PHP 5.3和命名空间。
require 'JShrink/Minifier.php';
if(filemtime('scripts_template.js') < filemtime('scripts_template.min.js')) {
read_file('scripts_template.min.js');
} else {
$output = \JShrink\Minifier::minify(file_get_contents('scripts_template.js'));
file_put_contents('scripts_template.min.js', $output);
echo $output;
}
答案 1 :(得分:4)
看看Assetic,这是一个很棒的PHP资产管理库。它与Symfony2很好地集成并被广泛使用。
答案 2 :(得分:2)
根据服务器的限制(例如,不在safe mode中运行),也许你可以超越PHP看一个缩小器并使用shell_exec()
运行它。例如,如果您可以在服务器上运行Java,请在服务器上放置YUI Compressor的副本并直接使用它。
然后scripts.php会是这样的:
<?php
$cmd = "java -cp [path-to-yui-dir] -jar [path-to-yuicompressor.jar] [path-to-scripts_template.js]";
echo(shell_exec($cmd));
?>
其他建议:在部署到服务器之前,将缩小步骤构建到开发工作流程中。例如,我设置了Eclipse PHP项目,将JS和CSS文件压缩到“build”文件夹中。像魅力一样。
答案 3 :(得分:0)
使用&#34; PHPWee &#34;:https://github.com/searchturbine/phpwee-php-minifier
(也使用JSmin
),我进一步推动了@Robert K解决方案。
此解决方案允许缩小CSS和JS文件。如果找不到非缩小文件,它将返回一个空字符串。如果缩小的文件比未缩小的文件旧,则会尝试创建它。如果它不存在,它将为缩小的文件创建一个子文件夹。如果该方法可以成功缩小文件,则会在<script>
(javascript)或<link>
(CSS)标记中返回该文件。否则,该方法将在正确的标记中返回非缩小版本。
注意:使用PHP 7.0.13进行测试
/**
* Try to minify the JS/CSS file. If we are not able to minify,
* returns the path of the full file (if it exists).
*
* @param $matches Array
* 0 = Full partial path
* 1 = Path without the file
* 2 = File name and extension
*
* @param $fileType Boolean
* FALSE: css file.
* TRUE: js file
*
* @return String
*/
private static function createMinifiedFile(array $matches, bool $fileType)
{
if (strpos($matches[1], 'shared_code') !== false) {
$path = realpath(dirname(__FILE__)) . str_replace(
'shared_code',
'..',
$matches[1]
);
} else {
$path = realpath(dirname(__FILE__)) .
"/../../" . $matches[1];
}
if (is_file($path . $matches[2])) {
$filePath = $link = $matches[0];
$min = 'min/' . str_replace(
'.',
'.min.',
$matches[2]
);
if (!is_file($path . $min) or
filemtime($path . $matches[2]) >
filemtime($path . $min)
) {
if (!is_dir($path . 'min')) {
mkdir($path . 'min');
}
if ($fileType) { // JS
$minified = preg_replace(
array(
'/(\))\R({)/',
'/(})\R/'
),
array(
'$1$2',
'$1'
),
Minify::js(
(string) file_get_contents(
$path . $matches[2]
)
)
);
} else { // CSS
$minified = preg_replace(
'@/\*(?:[\r\s\S](?!\*/))+\R?\*/@', //deal with multiline comments
'',
Minify::css(
(string) file_get_contents(
$path . $matches[2]
)
)
);
}
if (!empty($minified) and file_put_contents(
$path . $min,
$minified
)
) {
$filePath = $matches[1] . $min;
}
} else { // up-to-date
$filePath = $matches[1] . $min;
}
} else { // full file doesn't exists
$filePath = "";
}
return $filePath;
}
/**
* Return the minified version of a CSS file (must end with the .css extension).
* If the minified version of the file is older than the full CSS file,
* the CSS file will be shrunk.
*
* Note: An empty string will be return if the CSS file doesn't exist.
*
* Note 2: If the file exists, but the minified file cannot be created,
* we will return the path of the full file.
*
* @link https://github.com/searchturbine/phpwee-php-minifier Source
*
* @param $path String name or full path to reach the CSS file.
* If only the file name is specified, we assume that you refer to the shared path.
*
* @return String
*/
public static function getCSSMin(String $path)
{
$link = "";
$matches = array();
if (preg_match(
'@^(/[\w-]+/view/css/)?([\w-]+\.css)$@',
$path,
$matches
)
) {
if (empty($matches[1])) { // use the default path
$matches[1] = self::getCssPath();
$matches[0] = $matches[1] . $matches[2];
}
$link = self::createMinifiedFile($matches, false);
} else {
$link = "";
}
return (empty($link) ?
'' :
'<link rel="stylesheet" href="' . $link . '">'
);
}
/**
* Return the path to fetch CSS sheets.
*
* @return String
*/
public static function getCssPath()
{
return '/shared_code/css/' . self::getCurrentCSS() . "/";
}
/**
* Return the minified version of a JS file (must end with the .css extension).
* If the minified version of the file is older than the full JS file,
* the JS file will be shrunk.
*
* Note: An empty string will be return if the JS file doesn't exist.
*
* Note 2: If the file exists, but the minified file cannot be created,
* we will return the path of the full file.
*
* @link https://github.com/searchturbine/phpwee-php-minifier Source
*
* @param $path String name or full path to reach the js file.
*
* @return String
*/
public static function getJSMin(String $path)
{
$matches = array();
if (preg_match(
'@^(/[\w-]+(?:/view)?/js/)([\w-]+\.js)$@',
$path,
$matches
)
) {
$script = self::createMinifiedFile($matches, true);
} else {
$script = "";
}
return (empty($script) ?
'' :
'<script src="' . $script . '"></script>'
);
}
在(Smarty)模板中,您可以使用以下方法:
{$PageController->getCSSMin("main_frame.css")}
//Output: <link rel="stylesheet" href="/shared_code/css/default/min/main_frame.min.css">
{$PageController->getCSSMin("/gem-mechanic/view/css/gem_mechanic.css")}
//Output: <link rel="stylesheet" href="/gem-mechanic/view/css/min/gem_mechanic.min.css">
{$PageController->getJSMin("/shared_code/js/control_utilities.js")}
//Output: <script src="/shared_code/js/min/control_utilities.min.js"></script>
{$PageController->getJSMin("/PC_administration_interface/view/js/error_log.js")}
//Output: <script src="/PC_administration_interface/view/js/min/error_log.min.js"></script>
单元测试:
/**
* Test that we can minify CSS files successfully.
*/
public function testGetCSSMin()
{
//invalid style
$this->assertEmpty(
PageController::getCSSMin('doh!!!')
);
//shared style
$path = realpath(dirname(__FILE__)) . '/../css/default/min/main_frame.min.css';
if (is_file($path)) {
unlink ($path);
}
$link = PageController::getCSSMin("main_frame.css");
$this->assertNotEmpty($link);
$this->assertEquals(
'<link rel="stylesheet" href="/shared_code/css/default/min/main_frame.min.css">',
$link
);
$this->validateMinifiedFile($path);
//project style
$path = realpath(dirname(__FILE__)) . '/../../gem-mechanic/view/css/min/gem_mechanic.min.css';
if (is_file($path)) {
unlink ($path);
}
$link = PageController::getCSSMin("/gem-mechanic/view/css/gem_mechanic.css");
$this->assertNotEmpty($link);
$this->assertEquals(
'<link rel="stylesheet" href="/gem-mechanic/view/css/min/gem_mechanic.min.css">',
$link
);
$this->validateMinifiedFile($path);
}
/**
* Test that we can minify JS files successfully.
*/
public function testGetJSMin()
{
//invalid script
$this->assertEmpty(
PageController::getJSMin('doh!!!')
);
//shared script
$path = realpath(dirname(__FILE__)) . '/../js/min/control_utilities.min.js';
if (is_file($path)) {
unlink ($path);
}
$script = PageController::getJSMin("/shared_code/js/control_utilities.js");
$this->assertNotEmpty($script);
$this->assertEquals(
'<script src="/shared_code/js/min/control_utilities.min.js"></script>',
$script
);
$this->validateMinifiedFile($path);
//project script
$path = realpath(dirname(__FILE__)) . '/../../PC_administration_interface/view/js/min/error_log.min.js';
if (is_file($path)) {
unlink ($path);
}
$script = PageController::getJSMin("/PC_administration_interface/view/js/error_log.js");
$this->assertNotEmpty($script);
$this->assertEquals(
'<script src="/PC_administration_interface/view/js/min/error_log.min.js"></script>',
$script
);
$this->validateMinifiedFile($path);
}
/**
* Make sure that the minified file exists and that its content is valid.
*
* @param $path String the path to reach the file
*/
private function validateMinifiedFile(string $path)
{
$this->assertFileExists($path);
$content = (string) file_get_contents($path);
$this->assertNotEmpty($content);
$this->assertNotContains('/*', $content);
$this->assertEquals(
0,
preg_match(
'/\R/',
$content
)
);
}
附加说明:
phpwee.php
中,我必须将<?
替换为<?php
。class_exists()
无法找到类,即使它们在同一个文件中)。我通过删除每个文件中的命名空间来解决这个问题。答案 4 :(得分:0)
JavaScriptPacker自2008年开始运行,并且非常简单