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<?php |
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|
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namespace WPCoder\Optimization; |
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|
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class HTMLMinifier { |
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|
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public static function minify( $input ): string { |
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if ( trim( $input ) === "" ) { |
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return $input; |
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} |
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// Remove extra white-space(s) between HTML attribute(s) |
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$input = preg_replace_callback( '#<([^\/\s<>!]+)(?:\s+([^<>]*?)\s*|\s*)(\/?)>#s', function ( $matches ) { |
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return '<' . $matches[1] . preg_replace( '#([^\s=]+)(\=([\'"]?)(.*?)\3)?(\s+|$)#s', ' $1$2', $matches[2] ) . $matches[3] . '>'; |
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}, str_replace( "\r", "", $input ) ); |
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|
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return preg_replace( |
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array( |
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// t = text |
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// o = tag open |
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// c = tag close |
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// Keep important white-space(s) after self-closing HTML tag(s) |
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'#<(img|input)(>| .*?>)#s', |
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// Remove a line break and two or more white-space(s) between tag(s) |
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'#(<!--.*?-->)|(>)(?:\n*|\s{2,})(<)|^\s*|\s*$#s', |
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'#(<!--.*?-->)|(?<!\>)\s+(<\/.*?>)|(<[^\/]*?>)\s+(?!\<)#s', |
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// t+c || o+t |
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'#(<!--.*?-->)|(<[^\/]*?>)\s+(<[^\/]*?>)|(<\/.*?>)\s+(<\/.*?>)#s', |
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// o+o || c+c |
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'#(<!--.*?-->)|(<\/.*?>)\s+(\s)(?!\<)|(?<!\>)\s+(\s)(<[^\/]*?\/?>)|(<[^\/]*?\/?>)\s+(\s)(?!\<)#s', |
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// c+t || t+o || o+t -- separated by long white-space(s) |
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'#(<!--.*?-->)|(<[^\/]*?>)\s+(<\/.*?>)#s', |
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// empty tag |
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'#<(img|input)(>| .*?>)<\/\1>#s', |
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// reset previous fix |
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'#( ) (?![<\s])#', |
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// clean up ... |
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'#(?<=\>)( )(?=\<)#', |
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// --ibid |
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// Remove HTML comment(s) except IE and noindex comment(s) |
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'#\s*<!--(?!(\[if\s)|(noindex)|(\/noindex)).*?-->\s*|(?<!\>)\n+(?=\<[^!])#s', |
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//'#\s*<!--(?!\[if\s).*?-->\s*|(?<!\>)\n+(?=\<[^!])#s' - noindex fix |
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), |
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array( |
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'<$1$2</$1>', |
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'$1$2$3', |
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'$1$2$3', |
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'$1$2$3$4$5', |
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'$1$2$3$4$5$6$7', |
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'$1$2$3', |
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'<$1$2', |
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'$1 ', |
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'$1', |
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"" |
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), |
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$input ); |
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} |
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} |
