* include("cssmin.php"); * file_put_contents("path/to/target.css", cssmin::minify(file_get_contents("path/to/source.css"))); * * -- * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * -- * * @package cssmin * @author Joe Scylla * @copyright 2008 Joe Scylla * @license http://opensource.org/licenses/mit-license.php MIT License * @version 1.0.1.b3 (2008-10-02) */ class cssmin { /** * Minifies stylesheet definitions * * * $css_minified = cssmin::minify(file_get_contents("path/to/target/file.css")); * * * @param string $css Stylesheet definitions as string * @param array|string $options Array or comma speperated list of options: * * - remove-last-semicolon: Removes the last semicolon in * the style definition of an element (activated by default). * * - preserve-urls: Preserves every url defined in an url()- * expression. This option is only required if you have * defined really uncommon urls with multiple spaces or * combination of colon, semi-colon, braces with leading or * following spaces. * @return string Minified stylesheet definitions */ public static function minify($css, $options = "remove-last-semicolon") { $options = ($options == "") ? array() : (is_array($options) ? $options : explode(",", $options)); if (in_array("preserve-urls", $options)) { // Encode url() to base64 $css = preg_replace_callback("/url\s*\((.*)\)/siU", "cssmin_encode_url", $css); } // Remove comments $css = preg_replace("/\/\*[\d\D]*?\*\/|\t+/", " ", $css); // Replace CR, LF and TAB to spaces $css = str_replace(array("\n", "\r", "\t"), " ", $css); // Replace multiple to single space $css = preg_replace("/\s\s+/", " ", $css); // Remove unneeded spaces $css = preg_replace("/\s*({|}|\[|=|~|\+|>|\||;|:|,)\s*/", "$1", $css); if (in_array("remove-last-semicolon", $options)) { // Removes the last semicolon of every style definition $css = str_replace(";}", "}", $css); } $css = trim($css); if (in_array("preserve-urls", $options)) { // Decode url() $css = preg_replace_callback("/url\s*\((.*)\)/siU", "cssmin_encode_url", $css); } return $css; } /** * Return a array structure of a stylesheet definitions. * * * $css_structure = cssmin::toArray(file_get_contents("path/to/target/file.css")); * * * @param string $css Stylesheet definitions as string * @param string $options Options for {@link cssmin::minify()} * @return array Structure of the stylesheet definitions as array */ public static function toArray($css, $options = "") { $r = array(); $css = cssmin::minify($css, $options); $items = array(); preg_match_all("/(.+){(.+:.+);}/U", $css, $items); if (count($items[0]) > 0) { for ($i = 0; $i < count($items[0]); $i++) { $keys = explode(",", $items[1][$i]); $styles_tmp = explode(";", $items[2][$i]); $styles = array(); foreach ($styles_tmp as $style) { $style_tmp = explode(":", $style); $styles[$style_tmp[0]] = $style_tmp[1]; } $r[] = array( "keys" => cssmin_array_clean($keys), "styles" => cssmin_array_clean($styles) ); } } return $r; } /** * Return a array structure created by {@link cssmin::toArray()} to a string. * * * $css_string = cssmin::toString($css_structure); * * * @param array $css * @return array */ public static function toString(array $array) { $r = ""; foreach ($array as $item) { $r .= implode(",", $item["keys"]) . "{"; foreach ($item["styles"] as $key => $value) { $r .= $key . ":" . $value . ";"; } $r .= "}"; } return $r; } } /** * Trims all elements of the array and removes empty elements. * * @param array $array * @return array */ function cssmin_array_clean(array $array) { $r = array(); if (cssmin_array_is_assoc($array)) { foreach ($array as $key => $value) { $r[$key] = trim($value); } } else { foreach ($array as $value) { if (trim($value) != "") { $r[] = trim($value); } } } return $r; } /** * Return if a value is a associative array. * * @param array $array * @return bool */ function cssmin_array_is_assoc($array) { if (!is_array($array)) { return false; } else { krsort($array, SORT_STRING); return !is_numeric(key($array)); } } /** * Encodes a url() expression. * * @param array $match * @return string */ function cssmin_encode_url($match) { return "url(" . base64_encode(trim($match[1])) . ")"; } /** * Decodes a url() expression. * * @param array $match * @return string */ function cssmin_decode_url($match) { return "url(" . base64_decode($match[1]) . ")"; }