note 74899 added to function.php-strip-whitespace

Here's one for CSS: <?php function css_strip_whitespace($css) { $replace = array( "#/\*.*?\*/#s" => "", // Strip C style comments. "#\s\s+#" => " ", // Strip excess whitespace. ); $search = array_keys($replace); $css = preg_replace($search, $replace, $css); $replace = array( ": " => ":", "; " => ";", " {" => "{", " }" => "}", ", " => ",", "{ " => "{", ";}" => "}", // Strip optional semicolons. ",\n" => ",", // Don't wrap multiple selectors. "\n}" => "}", // Don't wrap closing braces. "} " => "}\n", // Put each rule on it's own line. ); $search = array_keys($replace); $css = str_replace($search, $replace, $css); return trim($css); } ?> A word on the first regular expression, since it took me a while. It strips C style comments. /* Like this. */ #/\*.*?\*/#s ^ ^ The pound signs at either end quote the regex. They don't match anything. #/\*.*?\*/#s ^ The s at the very end sets the PCRE_DOTALL modifier. More info here: http://www.php.net/manual/en/reference.pcre.pattern.modifiers.php # /\* .*? \*/ #s 1 2 3 The expression itself consists of 3 parts: 1. the opening comment sequence, represented by /\* 2. everything in the middle, represented by .*? 3. and the closing comment sequence, represented by \*/ #/\*.*?\*/#s ^ ^ The comment asterisks are escaped. If I had used the more common / for PCRE quoting I would've had to escape those too. #/\*.*?\*/#s ^ The ? prevents the regex from being greedy. See halfway down this page: http://www.php.net/manual/en/reference.pcre.pattern.syntax.php ---- Server IP: 69.147.83.197 Probable Submitter: 75.17.63.133 ---- Manual Page -- http://www.php.net/manual/en/function.php-strip-whitespace.php Edit -- https://master.php.net/note/edit/74899 Del: integrated -- https://master.php.net/note/delete/74899/integrated Del: useless -- https://master.php.net/note/delete/74899/useless Del: bad code -- https://master.php.net/note/delete/74899/bad+code Del: spam -- https://master.php.net/note/delete/74899/spam Del: non-english -- https://master.php.net/note/delete/74899/non-english Del: in docs -- https://master.php.net/note/delete/74899/in+docs Del: other reasons-- https://master.php.net/note/delete/74899 Reject -- https://master.php.net/note/reject/74899 Search -- https://master.php.net/manage/user-notes.php