压缩CSS YUI压缩器

Question

任何人都知道需要哪个选项来将所有css压缩到一行中。我使用的是一个名为bwp-minify的wordpress插件，但是这个插件的css压缩率很低，我正在尝试通过YUICompressor.php来改变它。

我尝试将换行符更改为0和100000，但都没有效果。

是不是如下所示；

  --line-break
      Some source control tools don't like files containing lines longer than,
      say 8000 characters. The linebreak option is used in that case to split
      long lines after a specific column. It can also be used to make the code
      more readable, easier to debug (especially with the MS Script Debugger)
      Specify 0 to get a line break after each semi-colon in JavaScript, and
      after each rule in CSS. 

源代码：

<?php
/**
 * Class Minify_YUICompressor 
 * @package Minify
 */

/**
 * Compress Javascript/CSS using the YUI Compressor
 * 
 * You must set $jarFile and $tempDir before calling the minify functions.
 * Also, depending on your shell's environment, you may need to specify
 * the full path to java in $javaExecutable or use putenv() to setup the
 * Java environment.
 * 
 * <code>
 * Minify_YUICompressor::$jarFile = '/path/to/yuicompressor-2.3.5.jar';
 * Minify_YUICompressor::$tempDir = '/tmp';
 * $code = Minify_YUICompressor::minifyJs(
 *   $code
 *   ,array('nomunge' => true, 'line-break' => 1000)
 * );
 * </code>
 * 
 * @todo unit tests, $options docs
 * 
 * @package Minify
 * @author Stephen Clay <steve@mrclay.org>
 */
class Minify_YUICompressor {

    /**
     * Filepath of the YUI Compressor jar file. This must be set before
     * calling minifyJs() or minifyCss().
     *
     * @var string
     */
    public static $jarFile = null;

    /**
     * Writable temp directory. This must be set before calling minifyJs()
     * or minifyCss().
     *
     * @var string
     */
    public static $tempDir = null;

    /**
     * Filepath of "java" executable (may be needed if not in shell's PATH)
     *
     * @var string
     */
    public static $javaExecutable = 'java';

    /**
     * Minify a Javascript string
     * 
     * @param string $js
     * 
     * @param array $options (verbose is ignored)
     * 
     * @see http://www.julienlecomte.net/yuicompressor/README
     * 
     * @return string 
     */
    public static function minifyJs($js, $options = array())
    {
        return self::_minify('js', $js, $options);
    }

    /**
     * Minify a CSS string
     * 
     * @param string $css
     * 
     * @param array $options (verbose is ignored)
     * 
     * @see http://www.julienlecomte.net/yuicompressor/README
     * 
     * @return string 
     */
    public static function minifyCss($css, $options = array())
    {
        return self::_minify('css', $css, $options);
    }

    private static function _minify($type, $content, $options)
    {
        self::_prepare();
        if (! ($tmpFile = tempnam(self::$tempDir, 'yuic_'))) {
            throw new Exception('Minify_YUICompressor : could not create temp file.');
        }
        file_put_contents($tmpFile, $content);
        exec(self::_getCmd($options, $type, $tmpFile), $output);
        unlink($tmpFile);
        return implode("\n", $output);
    }

    private static function _getCmd($userOptions, $type, $tmpFile)
    {
        $o = array_merge(
            array(
                'charset' => ''
                ,'line-break' => 5000
                ,'type' => $type
                ,'nomunge' => false
                ,'preserve-semi' => false
                ,'disable-optimizations' => false
            )
            ,$userOptions
        );
        $cmd = self::$javaExecutable . ' -jar ' . escapeshellarg(self::$jarFile)
             . " --type {$type}"
             . (preg_match('/^[a-zA-Z0-9\\-]+$/', $o['charset'])
                ? " --charset {$o['charset']}" 
                : '')
             . (is_numeric($o['line-break']) && $o['line-break'] >= 0
                ? ' --line-break ' . (int)$o['line-break']
                : '');
        if ($type === 'js') {
            foreach (array('nomunge', 'preserve-semi', 'disable-optimizations') as $opt) {
                $cmd .= $o[$opt] 
                    ? " --{$opt}"
                    : '';
            }
        }
        return $cmd . ' ' . escapeshellarg($tmpFile);
    }

    private static function _prepare()
    {
        if (! is_file(self::$jarFile)) {
            throw new Exception('Minify_YUICompressor : $jarFile('.self::$jarFile.') is not a valid file.');
        }
        if (! is_dir(self::$tempDir)) {
            throw new Exception('Minify_YUICompressor : $tempDir('.self::$tempDir.') is not a valid direcotry.');
        }
        if (! is_writable(self::$tempDir)) {
            throw new Exception('Minify_YUICompressor : $tempDir('.self::$tempDir.') is not writable.');
        }
    }
}

Answer 1

您是否尝试过使用---选项不中断行？

当我使用YUI压缩器时，我没有指定该选项，并且输出在一行上。

从您提供的源代码来看，无论您在何处调用

Minify_YUICompressor::minifyCss('/path/to.css');

需要将line-break选项设置为-1，如下所示：

Minify_YUICompressor::minifyCss('/path/to.css', array('line-break' => -1));

Answer 2

将以下代码放在php脚本的开头

<?php header('Content-Type:application/javascript'); ?>