'; function __minifyx($input) { return str_replace(array("\n", "\t", ' '), array(X . '\n', X . '\t', X . '\s'), $input); } function __minifyv($input) { return str_replace(array(X . '\n', X . '\t', X . '\s'), array("\n", "\t", ' '), $input); } /** * ======================================================= * HTML MINIFIER * ======================================================= */ function __replace_html_style_for_minify($m) { return $m[1] . $m[2] . minify_css($m[3]) . $m[2]; } function __replace_html_for_minify($m) { if(isset($m[2])) { // Minify inline CSS declaration(s) if(stripos($m[2], ' style=') !== false) { $m[2] = preg_replace_callback('#( style=)([\'"]?)(.*?)\2#i', '__replace_html_style_for_minify', $m[2]); } return '<' . $m[1] . preg_replace( array( // From `defer="defer"`, `defer='defer'`, `defer="true"`, `defer='true'`, `defer=""` and `defer=''` to `defer` [^1] '#\s(checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped)(?:=([\'"]?)(?:true|\1)?\2)#i', // Remove extra white-space(s) between HTML attribute(s) [^2] '#\s*([^\s=]+?)(=(?:\S+|([\'"]?).*?\3)|$)#', // From `` to `` [^3] '#\s+\/$#' ), array( // [^1] ' $1', // [^2] ' $1$2', // [^3] '/' ), str_replace("\n", ' ', $m[2])) . '>'; } return '<' . $m[1] . '>'; } function _minify_html($input) { return preg_replace_callback('#<\s*([^\/\s]+)\s*(?:>|(\s[^<>]+?)\s*>)#', '__replace_html_for_minify', $input); } function minify_html($input) { if( ! $input = trim($input)) return $input; global $CH; // Keep important white-space(s) after self-closing HTML tag(s) $input = preg_replace('#(<(?:img|input)(?:\s[^<>]*?)?\s*\/?>)\s+#i', '$1' . X . '\s', $input); // Create chunk(s) of HTML tag(s), ignored HTML group(s), HTML comment(s) and text $input = preg_split('#(' . $CH . '||\s[^<>]*?>)[\s\S]*?<\/pre>||\s[^<>]*?>)[\s\S]*?<\/code>||\s[^<>]*?>)[\s\S]*?<\/script>||\s[^<>]*?>)[\s\S]*?<\/style>||\s[^<>]*?>)[\s\S]*?<\/textarea>|<[^<>]+?>)#i', $input, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); $output = ""; foreach($input as $v) { if($v !== ' ' && trim($v) === "") continue; if($v[0] === '<' && substr($v, -1) === '>') { if($v[1] === '!' && strpos($v, '') continue; $output .= $v; } else { $output .= __minifyx(_minify_html($v)); } } else { // Force line-break with ` ` or ` ` $v = str_replace(array(' ', ' ', ' '), X . '\n', $v); // Force white-space with ` ` or ` ` $v = str_replace(array(' ', ' '), X . '\s', $v); // Replace multiple white-space(s) with a space $output .= preg_replace('#\s+#', ' ', $v); } } // Clean up ... $output = preg_replace( array( // Remove two or more white-space(s) between tag [^1] '#>([\n\r\t]\s*|\s{2,})<#', // Remove white-space(s) before tag-close [^2] '#\s+(<\/[^\s]+?>)#' ), array( // [^1] '><', // [^2] '$1' ), $output); $output = __minifyv($output); // Remove white-space(s) after ignored tag-open and before ignored tag-close (except ``) return preg_replace('#<(code|pre|script|style)(>|\s[^<>]*?>)\s*([\s\S]*?)\s*<\/\1>#i', '<$1$2$3</$1>', $output); } /** * ======================================================= * CSS MINIFIER * ======================================================= */ function __replace_css_for_minify($m) { return $m[1] . preg_replace('#\s+#', X . '\s', $m[2]) . ')'; } function _minify_css($input) { // Keep important white-space(s) in `calc()` if(stripos($input, 'calc(') !== false) { $input = preg_replace_callback('#\b(calc\()\s*(.*?)\s*\)#i', '__replace_css_for_minify', $input); } // Minify ... return preg_replace( array( // Fix case for `#foo [bar="baz"]` and `#foo :first-child` [^1] '#(?<![,\{\}])\s+(\[|:\w)#', // Fix case for `[bar="baz"] .foo` and `@media (foo: bar) and (baz: qux)` [^2] '#\]\s+#', '#\b\s+\(#', '#\)\s+\b#', // Minify HEX color code ... [^3] '#\#([\da-f])\1([\da-f])\2([\da-f])\3\b#i', // Remove white-space(s) around punctuation(s) [^4] '#\s*([~!@*\(\)+=\{\}\[\]:;,>\/])\s*#', // Replace zero unit(s) with `0` [^5] '#\b(?:0\.)?0([a-z]+\b|%)#i', // Replace `0.6` with `.6` [^6] '#\b0+\.(\d+)#', // Replace `:0 0`, `:0 0 0` and `:0 0 0 0` with `:0` [^7] '#:(0\s+){0,3}0(?=[!,;\)\}]|$)#', // Replace `background(?:-position)?:(0|none)` with `background$1:0 0` [^8] '#\b(background(?:-position)?):(0|none)\b#i', // Replace `(border(?:-radius)?|outline):none` with `$1:0` [^9] '#\b(border(?:-radius)?|outline):none\b#i', // Remove empty selector(s) [^10] '#(^|[\{\}])(?:[^\{\}]+)\{\}#', // Remove the last semi-colon and replace multiple semi-colon(s) with a semi-colon [^11] '#;+([;\}])#', // Replace multiple white-space(s) with a space [^12] '#\s+#' ), array( // [^1] X . '\s$1', // [^2] ']' . X . '\s', X . '\s(', ')' . X . '\s', // [^3] '#$1$2$3', // [^4] '$1', // [^5] '0', // [^6] '.$1', // [^7] ':0', // [^8] '$1:0 0', // [^9] '$1:0', // [^10] '$1', // [^11] '$1', // [^12] ' ' ), $input); } function minify_css($input) { if( ! $input = trim($input)) return $input; global $SS, $CC; // Keep important white-space(s) between comment(s) $input = preg_replace('#(' . $CC . ')\s+(' . $CC . ')#', '$1' . X . '\s$2', $input); // Create chunk(s) of string(s), comment(s) and text $input = preg_split('#(' . $SS . '|' . $CC . ')#', $input, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); $output = ""; foreach($input as $v) { if(trim($v) === "") continue; if( ($v[0] === '"' && substr($v, -1) === '"') || ($v[0] === "'" && substr($v, -1) === "'") || (strpos($v, '/*') === 0 && substr($v, -2) === '*/') ) { // Remove if not detected as important comment ... if($v[0] === '/' && strpos($v, '/*!') !== 0) continue; $output .= $v; // String or comment ... } else { $output .= _minify_css($v); } } // Remove quote(s) where possible ... $output = preg_replace( array( // '#(' . $CC . ')|(?<!\bcontent\:|[\s\(])([\'"])([a-z_][-\w]*?)\2#i', '#(' . $CC . ')|\b(url\()([\'"])([^\s]+?)\3(\))#i' ), array( // '$1$3', '$1$2$4$5' ), $output); return __minifyv($output); } /** * ======================================================= * JAVASCRIPT MINIFIER * ======================================================= */ function _minify_js($input) { return preg_replace( array( // Remove inline comment(s) [^1] '#\s*\/\/.*$#m', // Remove white-space(s) around punctuation(s) [^2] '#\s*([!%&*\(\)\-=+\[\]\{\}|;:,.<>?\/])\s*#', // Remove the last semi-colon and comma [^3] '#[;,]([\]\}])#', // Replace `true` with `!0` and `false` with `!1` [^4] '#\btrue\b#', '#\bfalse\b#', '#\breturn\s+#' ), array( // [^1] "", // [^2] '$1', // [^3] '$1', // [^4] '!0', '!1', 'return ' ), $input); } function minify_js($input) { if( ! $input = trim($input)) return $input; // Create chunk(s) of string(s), comment(s), regex(es) and text global $SS, $CC; $input = preg_split('#(' . $SS . '|' . $CC . '|\/[^\n]+?\/(?=[.,;]|[gimuy]|$))#', $input, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); $output = ""; foreach($input as $v) { if(trim($v) === "") continue; if( ($v[0] === '"' && substr($v, -1) === '"') || ($v[0] === "'" && substr($v, -1) === "'") || ($v[0] === '/' && substr($v, -1) === '/') ) { // Remove if not detected as important comment ... if(strpos($v, '//') === 0 || (strpos($v, '/*') === 0 && strpos($v, '/*!') !== 0 && strpos($v, '/*@cc_on') !== 0)) continue; $output .= $v; // String, comment or regex ... } else { $output .= _minify_js($v); } } return preg_replace( array( // Minify object attribute(s) except JSON attribute(s). From `{'foo':'bar'}` to `{foo:'bar'}` [^1] '#(' . $CC . ')|([\{,])([\'])(\d+|[a-z_]\w*)\3(?=:)#i', // From `foo['bar']` to `foo.bar` [^2] '#([\w\)\]])\[([\'"])([a-z_]\w*)\2\]#i' ), array( // [^1] '$1$2$4', // [^2] '$1.$3' ), $output); }