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html-min.cls.php
292 lines
| 1 | <?php |
| 2 | // phpcs:ignoreFile |
| 3 | /** |
| 4 | * Compress HTML |
| 5 | * |
| 6 | * This is a heavy regex-based removal of whitespace, unnecessary comments and |
| 7 | * tokens. IE conditional comments are preserved. There are also options to have |
| 8 | * STYLE and SCRIPT blocks compressed by callback functions. |
| 9 | * |
| 10 | * A test suite is available. |
| 11 | * |
| 12 | * @package Minify |
| 13 | * @author Stephen Clay <steve@mrclay.org> |
| 14 | */ |
| 15 | namespace LiteSpeed\Lib; |
| 16 | |
| 17 | defined( 'WPINC' ) || exit; |
| 18 | |
| 19 | class HTML_MIN { |
| 20 | |
| 21 | /** |
| 22 | * @var string |
| 23 | */ |
| 24 | protected $_html = ''; |
| 25 | |
| 26 | /** |
| 27 | * @var boolean |
| 28 | */ |
| 29 | protected $_jsCleanComments = true; |
| 30 | protected $_skipComments = array(); |
| 31 | |
| 32 | /** |
| 33 | * "Minify" an HTML page |
| 34 | * |
| 35 | * @param string $html |
| 36 | * |
| 37 | * @param array $options |
| 38 | * |
| 39 | * 'cssMinifier' : (optional) callback function to process content of STYLE |
| 40 | * elements. |
| 41 | * |
| 42 | * 'jsMinifier' : (optional) callback function to process content of SCRIPT |
| 43 | * elements. Note: the type attribute is ignored. |
| 44 | * |
| 45 | * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If |
| 46 | * unset, minify will sniff for an XHTML doctype. |
| 47 | * |
| 48 | * @return string |
| 49 | */ |
| 50 | public static function minify( $html, $options = array() ) { |
| 51 | $min = new self( $html, $options ); |
| 52 | |
| 53 | return $min->process(); |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Create a minifier object |
| 58 | * |
| 59 | * @param string $html |
| 60 | * |
| 61 | * @param array $options |
| 62 | * |
| 63 | * 'cssMinifier' : (optional) callback function to process content of STYLE |
| 64 | * elements. |
| 65 | * |
| 66 | * 'jsMinifier' : (optional) callback function to process content of SCRIPT |
| 67 | * elements. Note: the type attribute is ignored. |
| 68 | * |
| 69 | * 'jsCleanComments' : (optional) whether to remove HTML comments beginning and end of script block |
| 70 | * |
| 71 | * 'xhtml' : (optional boolean) should content be treated as XHTML1.0? If |
| 72 | * unset, minify will sniff for an XHTML doctype. |
| 73 | */ |
| 74 | public function __construct( $html, $options = array() ) { |
| 75 | $this->_html = str_replace( "\r\n", "\n", trim( $html ) ); |
| 76 | if ( isset( $options['xhtml'] ) ) { |
| 77 | $this->_isXhtml = (bool) $options['xhtml']; |
| 78 | } |
| 79 | if ( isset( $options['cssMinifier'] ) ) { |
| 80 | $this->_cssMinifier = $options['cssMinifier']; |
| 81 | } |
| 82 | if ( isset( $options['jsMinifier'] ) ) { |
| 83 | $this->_jsMinifier = $options['jsMinifier']; |
| 84 | } |
| 85 | if ( isset( $options['jsCleanComments'] ) ) { |
| 86 | $this->_jsCleanComments = (bool) $options['jsCleanComments']; |
| 87 | } |
| 88 | if ( isset( $options['skipComments'] ) ) { |
| 89 | $this->_skipComments = $options['skipComments']; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Minify the markeup given in the constructor |
| 95 | * |
| 96 | * @return string |
| 97 | */ |
| 98 | public function process() { |
| 99 | if ( $this->_isXhtml === null ) { |
| 100 | $this->_isXhtml = ( false !== strpos( $this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML' ) ); |
| 101 | } |
| 102 | |
| 103 | $this->_replacementHash = 'MINIFYHTML' . md5( $_SERVER['REQUEST_TIME'] ); |
| 104 | $this->_placeholders = array(); |
| 105 | |
| 106 | // replace SCRIPTs (and minify) with placeholders |
| 107 | $this->_html = preg_replace_callback( |
| 108 | '/(\\s*)<script(\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i', |
| 109 | array( $this, '_removeScriptCB' ), |
| 110 | $this->_html |
| 111 | ); |
| 112 | |
| 113 | // replace STYLEs (and minify) with placeholders |
| 114 | $this->_html = preg_replace_callback( |
| 115 | '/\\s*<style(\\b[^>]*>)([\\s\\S]*?)<\\/style>\\s*/i', |
| 116 | array( $this, '_removeStyleCB' ), |
| 117 | $this->_html |
| 118 | ); |
| 119 | |
| 120 | // remove HTML comments (not containing IE conditional comments). |
| 121 | $this->_html = preg_replace_callback( |
| 122 | '/<!--([\\s\\S]*?)-->/', |
| 123 | array( $this, '_commentCB' ), |
| 124 | $this->_html |
| 125 | ); |
| 126 | |
| 127 | // replace PREs with placeholders |
| 128 | $this->_html = preg_replace_callback( |
| 129 | '/\\s*<pre(\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i', |
| 130 | array( $this, '_removePreCB' ), |
| 131 | $this->_html |
| 132 | ); |
| 133 | |
| 134 | // replace TEXTAREAs with placeholders |
| 135 | $this->_html = preg_replace_callback( |
| 136 | '/\\s*<textarea(\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i', |
| 137 | array( $this, '_removeTextareaCB' ), |
| 138 | $this->_html |
| 139 | ); |
| 140 | |
| 141 | // trim each line. |
| 142 | // @todo take into account attribute values that span multiple lines. |
| 143 | $this->_html = preg_replace( '/^\\s+|\\s+$/m', '', $this->_html ); |
| 144 | |
| 145 | // remove ws around block/undisplayed elements |
| 146 | $this->_html = preg_replace( |
| 147 | '/\\s+(<\\/?(?:area|article|aside|base(?:font)?|blockquote|body' |
| 148 | . '|canvas|caption|center|col(?:group)?|dd|dir|div|dl|dt|fieldset|figcaption|figure|footer|form' |
| 149 | . '|frame(?:set)?|h[1-6]|head|header|hgroup|hr|html|legend|li|link|main|map|menu|meta|nav' |
| 150 | . '|ol|opt(?:group|ion)|output|p|param|section|t(?:able|body|head|d|h||r|foot|itle)' |
| 151 | . '|ul|video)\\b[^>]*>)/i', |
| 152 | '$1', |
| 153 | $this->_html |
| 154 | ); |
| 155 | |
| 156 | // remove ws outside of all elements |
| 157 | $this->_html = preg_replace( |
| 158 | '/>(\\s(?:\\s*))?([^<]+)(\\s(?:\s*))?</', |
| 159 | '>$1$2$3<', |
| 160 | $this->_html |
| 161 | ); |
| 162 | |
| 163 | // use newlines before 1st attribute in open tags (to limit line lengths) |
| 164 | // $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html); |
| 165 | |
| 166 | // fill placeholders |
| 167 | $this->_html = str_replace( |
| 168 | array_keys( $this->_placeholders ), |
| 169 | array_values( $this->_placeholders ), |
| 170 | $this->_html |
| 171 | ); |
| 172 | // issue 229: multi-pass to catch scripts that didn't get replaced in textareas |
| 173 | $this->_html = str_replace( |
| 174 | array_keys( $this->_placeholders ), |
| 175 | array_values( $this->_placeholders ), |
| 176 | $this->_html |
| 177 | ); |
| 178 | |
| 179 | return $this->_html; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * From LSCWP 6.2: Changed the function to test for special comments that will be skipped. See: https://github.com/litespeedtech/lscache_wp/pull/622 |
| 184 | */ |
| 185 | protected function _commentCB( $m ) { |
| 186 | // If is IE conditional comment return it. |
| 187 | if ( 0 === strpos( $m[1], '[' ) || false !== strpos( $m[1], '<![' ) ) { |
| 188 | return $m[0]; |
| 189 | } |
| 190 | |
| 191 | // Check if comment text is present in Page Optimization -> HTML Settings -> HTML Keep comments |
| 192 | if ( count( $this->_skipComments ) > 0 ) { |
| 193 | foreach ( $this->_skipComments as $comment ) { |
| 194 | if ( $comment && strpos( $m[1], $comment ) !== false ) { |
| 195 | return $m[0]; |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | // Comment can be removed. |
| 201 | return ''; |
| 202 | } |
| 203 | |
| 204 | protected function _reservePlace( $content ) { |
| 205 | $placeholder = '%' . $this->_replacementHash . count( $this->_placeholders ) . '%'; |
| 206 | $this->_placeholders[ $placeholder ] = $content; |
| 207 | |
| 208 | return $placeholder; |
| 209 | } |
| 210 | |
| 211 | protected $_isXhtml = null; |
| 212 | protected $_replacementHash = null; |
| 213 | protected $_placeholders = array(); |
| 214 | protected $_cssMinifier = null; |
| 215 | protected $_jsMinifier = null; |
| 216 | |
| 217 | protected function _removePreCB( $m ) { |
| 218 | return $this->_reservePlace( "<pre{$m[1]}" ); |
| 219 | } |
| 220 | |
| 221 | protected function _removeTextareaCB( $m ) { |
| 222 | return $this->_reservePlace( "<textarea{$m[1]}" ); |
| 223 | } |
| 224 | |
| 225 | protected function _removeStyleCB( $m ) { |
| 226 | $openStyle = "<style{$m[1]}"; |
| 227 | $css = $m[2]; |
| 228 | // remove HTML comments |
| 229 | $css = preg_replace( '/(?:^\\s*<!--|-->\\s*$)/', '', $css ); |
| 230 | |
| 231 | // remove CDATA section markers |
| 232 | $css = $this->_removeCdata( $css ); |
| 233 | |
| 234 | // minify |
| 235 | $minifier = $this->_cssMinifier |
| 236 | ? $this->_cssMinifier |
| 237 | : 'trim'; |
| 238 | $css = call_user_func( $minifier, $css ); |
| 239 | |
| 240 | return $this->_reservePlace( |
| 241 | $this->_needsCdata( $css ) |
| 242 | ? "{$openStyle}/*<![CDATA[*/{$css}/*]]>*/</style>" |
| 243 | : "{$openStyle}{$css}</style>" |
| 244 | ); |
| 245 | } |
| 246 | |
| 247 | protected function _removeScriptCB( $m ) { |
| 248 | $openScript = "<script{$m[2]}"; |
| 249 | $js = $m[3]; |
| 250 | |
| 251 | // whitespace surrounding? preserve at least one space |
| 252 | $ws1 = ( $m[1] === '' ) ? '' : ' '; |
| 253 | $ws2 = ( $m[4] === '' ) ? '' : ' '; |
| 254 | |
| 255 | // remove HTML comments (and ending "//" if present) |
| 256 | if ( $this->_jsCleanComments ) { |
| 257 | $js = preg_replace( '/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $js ); |
| 258 | } |
| 259 | |
| 260 | // remove CDATA section markers |
| 261 | $js = $this->_removeCdata( $js ); |
| 262 | |
| 263 | // minify |
| 264 | /** |
| 265 | * Added 2nd param by LiteSpeed |
| 266 | * |
| 267 | * @since 2.2.3 |
| 268 | */ |
| 269 | if ( $this->_jsMinifier ) { |
| 270 | $js = call_user_func( $this->_jsMinifier, $js, trim( $m[2] ) ); |
| 271 | } else { |
| 272 | $js = trim( $js ); |
| 273 | } |
| 274 | |
| 275 | return $this->_reservePlace( |
| 276 | $this->_needsCdata( $js ) |
| 277 | ? "{$ws1}{$openScript}/*<![CDATA[*/{$js}/*]]>*/</script>{$ws2}" |
| 278 | : "{$ws1}{$openScript}{$js}</script>{$ws2}" |
| 279 | ); |
| 280 | } |
| 281 | |
| 282 | protected function _removeCdata( $str ) { |
| 283 | return ( false !== strpos( $str, '<![CDATA[' ) ) |
| 284 | ? str_replace( array( '<![CDATA[', ']]>' ), '', $str ) |
| 285 | : $str; |
| 286 | } |
| 287 | |
| 288 | protected function _needsCdata( $str ) { |
| 289 | return ( $this->_isXhtml && preg_match( '/(?:[<&]|\\-\\-|\\]\\]>)/', $str ) ); |
| 290 | } |
| 291 | } |
| 292 |