140 lines
3.8 KiB
PHP
140 lines
3.8 KiB
PHP
<?php
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/**
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* Class Minify_YUICompressor
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* @package Minify
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*/
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/**
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* Compress Javascript/CSS using the YUI Compressor
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*
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* You must set $jarFile and $tempDir before calling the minify functions.
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* Also, depending on your shell's environment, you may need to specify
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* the full path to java in $javaExecutable or use putenv() to setup the
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* Java environment.
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*
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* <code>
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* Minify_YUICompressor::$jarFile = '/path/to/yuicompressor-2.3.5.jar';
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* Minify_YUICompressor::$tempDir = '/tmp';
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* $code = Minify_YUICompressor::minifyJs(
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* $code
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* ,array('nomunge' => true, 'line-break' => 1000)
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* );
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* </code>
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*
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* @todo unit tests, $options docs
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*
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* @package Minify
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* @author Stephen Clay <steve@mrclay.org>
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*/
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class Minify_YUICompressor {
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/**
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* Filepath of the YUI Compressor jar file. This must be set before
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* calling minifyJs() or minifyCss().
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*
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* @var string
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*/
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public static $jarFile = null;
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/**
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* Writable temp directory. This must be set before calling minifyJs()
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* or minifyCss().
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*
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* @var string
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*/
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public static $tempDir = null;
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/**
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* Filepath of "java" executable (may be needed if not in shell's PATH)
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*
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* @var string
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*/
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public static $javaExecutable = 'java';
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/**
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* Minify a Javascript string
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*
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* @param string $js
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*
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* @param array $options (verbose is ignored)
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*
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* @see http://www.julienlecomte.net/yuicompressor/README
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*
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* @return string
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*/
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public static function minifyJs($js, $options = array())
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{
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return self::_minify('js', $js, $options);
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}
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/**
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* Minify a CSS string
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*
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* @param string $css
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*
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* @param array $options (verbose is ignored)
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*
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* @see http://www.julienlecomte.net/yuicompressor/README
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*
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* @return string
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*/
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public static function minifyCss($css, $options = array())
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{
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return self::_minify('css', $css, $options);
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}
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private static function _minify($type, $content, $options)
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{
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self::_prepare();
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if (! ($tmpFile = tempnam(self::$tempDir, 'yuic_'))) {
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throw new Exception('Minify_YUICompressor : could not create temp file.');
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}
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file_put_contents($tmpFile, $content);
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exec(self::_getCmd($options, $type, $tmpFile), $output);
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unlink($tmpFile);
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return implode("\n", $output);
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}
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private static function _getCmd($userOptions, $type, $tmpFile)
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{
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$o = array_merge(
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array(
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'charset' => ''
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,'line-break' => 5000
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,'type' => $type
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,'nomunge' => false
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,'preserve-semi' => false
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,'disable-optimizations' => false
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)
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,$userOptions
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);
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$cmd = self::$javaExecutable . ' -jar ' . escapeshellarg(self::$jarFile)
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. " --type {$type}"
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. (preg_match('/^[a-zA-Z\\-]+$/', $o['charset'])
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? " --charset {$o['charset']}"
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: '')
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. (is_numeric($o['line-break']) && $o['line-break'] >= 0
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? ' --line-break ' . (int)$o['line-break']
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: '');
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if ($type === 'js') {
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foreach (array('nomunge', 'preserve-semi', 'disable-optimizations') as $opt) {
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$cmd .= $o[$opt]
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? " --{$opt}"
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: '';
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}
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}
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return $cmd . ' ' . escapeshellarg($tmpFile);
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}
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private static function _prepare()
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{
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if (! is_file(self::$jarFile)
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|| ! is_dir(self::$tempDir)
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|| ! is_writable(self::$tempDir)
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) {
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throw new Exception('Minify_YUICompressor : $jarFile and $tempDir must be set.');
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}
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}
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}
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