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PHP Function to Minify HTML, CSS and JavaScript
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| <?php | |
| /** | |
| * ----------------------------------------------------------------------------------------- | |
| * Based on `https://github.com/mecha-cms/mecha-cms/blob/master/system/kernel/converter.php` | |
| * ----------------------------------------------------------------------------------------- | |
| */ | |
| // HTML Minifier | |
| function minify_html($input) { | |
| if(trim($input) === "") return $input; | |
| // Remove extra white-space(s) between HTML attribute(s) | |
| $input = preg_replace_callback('#<([^\/\s<>!]+)(?:\s+([^<>]*?)\s*|\s*)(\/?)>#s', function($matches) { | |
| return '<' . $matches[1] . preg_replace('#([^\s=]+)(\=([\'"]?)(.*?)\3)?(\s+|$)#s', ' $1$2', $matches[2]) . $matches[3] . '>'; | |
| }, str_replace("\r", "", $input)); | |
| // Minify inline CSS declaration(s) | |
| if(strpos($input, ' style=') !== false) { | |
| $input = preg_replace_callback('#<([^<]+?)\s+style=([\'"])(.*?)\2(?=[\/\s>])#s', function($matches) { | |
| return '<' . $matches[1] . ' style=' . $matches[2] . minify_css($matches[3]) . $matches[2]; | |
| }, $input); | |
| } | |
| if(strpos($input, '</style>') !== false) { | |
| $input = preg_replace_callback('#<style(.*?)>(.*?)</style>#is', function($matches) { | |
| return '<style' . $matches[1] .'>'. minify_css($matches[2]) . '</style>'; | |
| }, $input); | |
| } | |
| if(strpos($input, '</script>') !== false) { | |
| $input = preg_replace_callback('#<script(.*?)>(.*?)</script>#is', function($matches) { | |
| return '<script' . $matches[1] .'>'. minify_js($matches[2]) . '</script>'; | |
| }, $input); | |
| } | |
| return preg_replace( | |
| array( | |
| // t = text | |
| // o = tag open | |
| // c = tag close | |
| // Keep important white-space(s) after self-closing HTML tag(s) | |
| '#<(img|input)(>| .*?>)#s', | |
| // Remove a line break and two or more white-space(s) between tag(s) | |
| '#(<!--.*?-->)|(>)(?:\n*|\s{2,})(<)|^\s*|\s*$#s', | |
| '#(<!--.*?-->)|(?<!\>)\s+(<\/.*?>)|(<[^\/]*?>)\s+(?!\<)#s', // t+c || o+t | |
| '#(<!--.*?-->)|(<[^\/]*?>)\s+(<[^\/]*?>)|(<\/.*?>)\s+(<\/.*?>)#s', // o+o || c+c | |
| '#(<!--.*?-->)|(<\/.*?>)\s+(\s)(?!\<)|(?<!\>)\s+(\s)(<[^\/]*?\/?>)|(<[^\/]*?\/?>)\s+(\s)(?!\<)#s', // c+t || t+o || o+t -- separated by long white-space(s) | |
| '#(<!--.*?-->)|(<[^\/]*?>)\s+(<\/.*?>)#s', // empty tag | |
| '#<(img|input)(>| .*?>)<\/\1>#s', // reset previous fix | |
| '#( ) (?![<\s])#', // clean up ... | |
| '#(?<=\>)( )(?=\<)#', // --ibid | |
| // Remove HTML comment(s) except IE comment(s) | |
| '#\s*<!--(?!\[if\s).*?-->\s*|(?<!\>)\n+(?=\<[^!])#s' | |
| ), | |
| array( | |
| '<$1$2</$1>', | |
| '$1$2$3', | |
| '$1$2$3', | |
| '$1$2$3$4$5', | |
| '$1$2$3$4$5$6$7', | |
| '$1$2$3', | |
| '<$1$2', | |
| '$1 ', | |
| '$1', | |
| "" | |
| ), | |
| $input); | |
| } | |
| // CSS Minifier => http://ideone.com/Q5USEF + improvement(s) | |
| function minify_css($input) { | |
| if(trim($input) === "") return $input; | |
| return preg_replace( | |
| array( | |
| // Remove comment(s) | |
| '#("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\')|\/\*(?!\!)(?>.*?\*\/)|^\s*|\s*$#s', | |
| // Remove unused white-space(s) | |
| '#("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\'|\/\*(?>.*?\*\/))|\s*+;\s*+(})\s*+|\s*+([*$~^|]?+=|[{};,>~]|\s(?![0-9\.])|!important\b)\s*+|([[(:])\s++|\s++([])])|\s++(:)\s*+(?!(?>[^{}"\']++|"(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\')*+{)|^\s++|\s++\z|(\s)\s+#si', | |
| // Replace `0(cm|em|ex|in|mm|pc|pt|px|vh|vw|%)` with `0` | |
| '#(?<=[\s:])(0)(cm|em|ex|in|mm|pc|pt|px|vh|vw|%)#si', | |
| // Replace `:0 0 0 0` with `:0` | |
| '#:(0\s+0|0\s+0\s+0\s+0)(?=[;\}]|\!important)#i', | |
| // Replace `background-position:0` with `background-position:0 0` | |
| '#(background-position):0(?=[;\}])#si', | |
| // Replace `0.6` with `.6`, but only when preceded by `:`, `,`, `-` or a white-space | |
| '#(?<=[\s:,\-])0+\.(\d+)#s', | |
| // Minify string value | |
| '#(\/\*(?>.*?\*\/))|(?<!content\:)([\'"])([a-z_][a-z0-9\-_]*?)\2(?=[\s\{\}\];,])#si', | |
| '#(\/\*(?>.*?\*\/))|(\burl\()([\'"])([^\s]+?)\3(\))#si', | |
| // Minify HEX color code | |
| '#(?<=[\s:,\-]\#)([a-f0-6]+)\1([a-f0-6]+)\2([a-f0-6]+)\3#i', | |
| // Replace `(border|outline):none` with `(border|outline):0` | |
| '#(?<=[\{;])(border|outline):none(?=[;\}\!])#', | |
| // Remove empty selector(s) | |
| '#(\/\*(?>.*?\*\/))|(^|[\{\}])(?:[^\s\{\}]+)\{\}#s' | |
| ), | |
| array( | |
| '$1', | |
| '$1$2$3$4$5$6$7', | |
| '$1', | |
| ':0', | |
| '$1:0 0', | |
| '.$1', | |
| '$1$3', | |
| '$1$2$4$5', | |
| '$1$2$3', | |
| '$1:0', | |
| '$1$2' | |
| ), | |
| $input); | |
| } | |
| // JavaScript Minifier | |
| function minify_js($input) { | |
| if(trim($input) === "") return $input; | |
| return preg_replace( | |
| array( | |
| // Remove comment(s) | |
| '#\s*("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\')\s*|\s*\/\*(?!\!|@cc_on)(?>[\s\S]*?\*\/)\s*|\s*(?<![\:\=])\/\/.*(?=[\n\r]|$)|^\s*|\s*$#', | |
| // Remove white-space(s) outside the string and regex | |
| '#("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\'|\/\*(?>.*?\*\/)|\/(?!\/)[^\n\r]*?\/(?=[\s.,;]|[gimuy]|$))|\s*([!%&*\(\)\-=+\[\]\{\}|;:,.<>?\/])\s*#s', | |
| // Remove the last semicolon | |
| '#;+\}#', | |
| // Minify object attribute(s) except JSON attribute(s). From `{'foo':'bar'}` to `{foo:'bar'}` | |
| '#([\{,])([\'])(\d+|[a-z_][a-z0-9_]*)\2(?=\:)#i', | |
| // --ibid. From `foo['bar']` to `foo.bar` | |
| '#([a-z0-9_\)\]])\[([\'"])([a-z_][a-z0-9_]*)\2\]#i' | |
| ), | |
| array( | |
| '$1', | |
| '$1$2', | |
| '}', | |
| '$1$3', | |
| '$1.$3' | |
| ), | |
| $input); | |
| } |
Author
css replace 0% It will cause crash keyframes uses ( 0% ) ...
css replace 0% It will cause crash keyframes uses ( 0% ) ...
Hi Rodrigo, any lucky looking into this one? keyframes are increasingly getting more important in nowadays CSS implementations and it can surely start being a problem in many cases.
css replace 0% It will cause crash keyframes uses ( 0% ) ...
Though I don't do css much, I think \d% in keyframe rules is always followed by {. Hence this pattern would work: (?<=[\s:])(0)(cm|em|ex|in|mm|pc|pt|px|vh|vw|%)(?!\s*\{).
One problem,
var loadPage = function(){
// Content
}
var loadPage = function(){
// Content
}
When compressing an error.
Here is correct.
var loadPage = function(){
// Content
};
var loadPage = function(){
// Content
};
How to fix this.
Thank!
These are great, thanks! Like others, I removed the 0 replacement line. Thanks for much for sharing.
Thank you so much
could you guys explain me about Keep important white-space(s) after self-closing HTML tag(s) '#<(img|input)(>| .*?>)#s', and '#<(img|input)(>| .*?>)<\/\1>#s'
an example would be great 😄
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Fixed problem in whitespace in CSS calc()
thanks @jcmarchi and @TriForceX for solution