如何在PHP中轻松缩小JS…或者其他什么

如何在PHP中轻松缩小JS…或者其他什么,php,javascript,minify,Php,Javascript,Minify,我四处看了看,但还是有点困惑 我尝试了Crockford的JSMin,但是WinXP由于某种原因无法解压缩可执行文件 但我真正想要的是一个简单易用的JS迷你程序,它使用PHP缩小JS代码并返回结果 原因是: 我有两个文件(例如)在其中工作:scripts.js和scripts\u template.js scripts_模板是我编写的普通代码——然后我必须缩小它并将缩小后的脚本粘贴到scripts.js中——我在网站上实际使用的脚本 我想通过在我的页面上做这样的事情来根除中间人: <scr

我四处看了看,但还是有点困惑

我尝试了Crockford的JSMin,但是WinXP由于某种原因无法解压缩可执行文件

但我真正想要的是一个简单易用的JS迷你程序,它使用PHP缩小JS代码并返回结果

原因是: 我有两个文件(例如)在其中工作:scripts.js和scripts\u template.js

scripts_模板是我编写的普通代码——然后我必须缩小它并将缩小后的脚本粘贴到scripts.js中——我在网站上实际使用的脚本

我想通过在我的页面上做这样的事情来根除中间人:

<script type="text/javascript" src="scripts.php"></script>

然后对于scripts.php的内容:

<?php include("include.inc"); header("Content-type:text/javascript"); echo(minify_js(file_get_contents("scripts_template.js")));
我已经用了相当长一段时间了。连接文件时可能有点危险,因为闭包末尾可能缺少分号

缓存缩小的输出并回显缓存的内容是一个明智的想法,只要它比源文件更新

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;
}
需要'jsmin.php';
如果(filemtime('scripts_template.js')
你也可以试试。我以前从未使用过它,因为我以前在JSMin方面没有遇到过困难,但是下面的代码应该可以做到这一点。我没有意识到这一点,但JShrink需要PHP5.3和名称空间

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;
}
需要'JShrink/Minifier.php';
如果(filemtime('scripts_template.js')
看看Assetic,它是PHP中一个很棒的资产管理库。它与Symfony2集成良好,应用广泛


根据服务器的限制(例如,不在运行),也许您还可以在PHP之外寻找一个迷你程序,并使用
shell\u exec()
运行它。例如,如果您可以在服务器上运行Java,请在服务器上放置的副本并直接使用它

然后scripts.php将类似于:

<?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中。例如,我将EclipsePHP项目设置为将JS和CSS文件压缩到“build”文件夹中。工作起来像个符咒。

使用“PHPWee”: (它也使用了
JSmin
),我把@robertk解决方案推得更远了一点

此解决方案允许缩小CSS和JS文件。如果找不到未缩小的文件,它将返回空字符串。如果缩小的文件比未缩小的文件旧,它将尝试创建它。如果缩小的文件不存在,它将为其创建一个子文件夹。如果该方法可以成功缩小文件,它将以
(javascript)或
(CSS)标记的形式返回该文件。否则,该方法将在适当的标记中返回非精简版本

注意:使用PHP7.0.13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="' . $script . '"></script>'
    );
}
/**
*尝试缩小JS/CSS文件。如果我们不能缩小,
*返回完整文件的路径(如果存在)。
*
*@param$匹配数组
*0=完整部分路径
*1=没有文件的路径
*2=文件名和扩展名
*
*@param$fileType布尔值
*错误:css文件。
*TRUE:js文件
*
*@返回字符串
*/
私有静态函数createMinifiedFile(数组$matches,bool$fileType)
{
if(strpos($matches[1],'shared_code')!==false){
$path=realpath(dirname(_文件__)).str\u replace(
“共享_代码”,
'..',
$matches[1]
);
}否则{
$path=realpath(dirname(_文件__))。
“/../../”$matches[1];
}
如果(是_文件($path.$matches[2])){
$filePath=$link=$matches[0];
$min='min/'。str_替换(
'.',
"民先生",,
$matches[2]
);
如果(!is_file($path.$min)或
filemtime($path.$matches[2])>
filemtime($path.$min)
) {
如果(!is_dir($path.'min')){
mkdir($path.min');
}
如果($fileType){//JS
$minified=预更换(
排列(
“/(\)\R({)/”,
“/(})\R/”
),
排列(
'$1$2',
'$1'
),
缩小::js(
(字符串)文件\u获取\u内容(
$path.$matches[2]
)
)
);
}else{//CSS
$minified=预更换(
'@/\*(?:[\r\s\s](?!\*/)+\r?\*/@',//处理多行注释
'',
缩小::css(
(字符串)文件\u获取\u内容(
$path.$matches[2]
)
)
);
}
如果(!empty($minified)和文件内容(
$path.$min,
$minified
)
) {
$filePath=$matches[1]。$min;
}
}else{//最新
$filePath=$matches[1]。$min;
}
}否则{//完整文件不存在
$filePath=“”;
}
返回$filePath;
}
/**
*返回CSS文件的缩小版本(必须以.CSS扩展名结尾)。
*如果文件的缩小版本早于完整CSS文件,
*CSS文件将被收缩。
*
*注意:将返回一个空字符串
{$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>
/**
* 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
        )
    );
}