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Minify.php
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Minify.php
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<?php
namespace RedCat\Templix;
class Minify {
static function PHP($src){
return (new static())->minifyPHP($src);
}
static function JS($src){
return (new static())->minifyJS($src);
}
static function HTML($src){
return (new static())->minifyHTML($src);
}
static function CSS($src){
//return str_replace(["\r\n", "\r", "\n", "\t", ' ', ' ', ' ',"\ r \ n", "\ r", "\ n", "\ t"],'',preg_replace( '! / \ *[^*]* \ *+([^/][^*]* \ *+)*/!','',preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!','',$src)));
$css = new CSSmin();
return $css->run($src);
}
var $minifyHTML;
private $tokens = [];
private $result;
function minifyPHP($text,$minifyHTML=true){
$this->tokens = [];
$this->result = null;
$this->minifyHTML = $minifyHTML;
$this->add_tokens($text);
return str_replace('?><?php','',$this);
}
function __toString() {
$this->remove_public_modifier();
$str = $this->generate_result();
return "$str";
}
private function compressLoop(){
foreach($this->tokens as $t) {
$text = $t[1];
if(!strlen($text))
continue;
$l = strlen($this->result)-1;
if(preg_match("~^\\w\\w$~", (isset($this->result[$l])?$this->result[$l]:'').$text[0]))
$this->result .= " ";
$this->result .= $text;
}
}
private function compressLoopHTML(){
$php = false;
foreach($this->tokens as $t){
$text = $t[1];
$l = strlen($this->result)-1;
if(strlen($text)&&preg_match("~^\\w\\w$~",(isset($this->result[$l])?$this->result[$l]:'').$text[0]))
$this->result .= ' ';
if(($tt=trim($text))=='?>'){
$this->result .= $text;
$php = false;
}
elseif($tt=='<?php'||$tt=='<?'){
$php = true;
$this->result .= $text;
if(substr($text,-1)!=' ')
$this->result .= ' ';
}
else{
if(!$php){
$tmp = $this->minifyHTML($text);
if(preg_match("/\\s/",substr($text,-1)))
$tmp .= ' ';
if(preg_match("/\\s/",substr($text,0,1)))
$tmp = ' '.$tmp;
$text = $tmp;
}
$this->result .= $text;
}
}
}
private function generate_result() {
$this->result = "";
if($this->minifyHTML)
$this->compressLoopHTML();
else
$this->compressLoop();
return $this->result;
}
private function remove_public_modifier() {
for($i = 0; $i < count($this->tokens) - 1; $i++) {
if($this->tokens[$i][0] == T_PUBLIC){
if($this->tokens[$i-1][0] == T_STATIC){
$this->tokens[$i] = $this->tokens[$i + 1][1][0] == '$' ? ["", ""] : [-1, ""];
}
else{
$this->tokens[$i] = $this->tokens[$i + 1][1][0] == '$' ? [T_VAR, "var"] : [-1, ""];
}
}
}
}
private function add_tokens($text) {
$tokens = token_get_all(trim($text));
$pending_whitespace = count($this->tokens) ? "\n" : "";
foreach($tokens as $t) {
if(!is_array($t))
$t = [-1, $t];
if($t[0] == T_COMMENT || $t[0] == T_DOC_COMMENT)
continue;
if($t[0] == T_WHITESPACE) {
$pending_whitespace .= $t[1];
continue;
}
$this->tokens[] = $t;
$pending_whitespace = "";
}
}
protected $_isXhtml = null;
protected $_replacementHash = null;
protected $_placeholders = [];
protected $_html;
function minifyHTML($html){
$this->_html = str_replace("\r\n", "\n", trim($html));
if ($this->_isXhtml === null)
$this->_isXhtml = (false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
$this->_replacementHash = 'MINIFYHTML' . md5($_SERVER['REQUEST_TIME']);
$this->_placeholders = [];
// replace SCRIPTs (and minify) with placeholders
$this->_html = preg_replace_callback(
'/(\\s*)(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i'
,[$this, '_removeScriptCB']
,$this->_html);
// replace STYLEs (and minify) with placeholders
$this->_html = preg_replace_callback(
'/\\s*(<style\\b[^>]*?>)([\\s\\S]*?)<\\/style>\\s*/i'
,[$this, '_removeStyleCB']
,$this->_html);
// remove HTML comments (not containing IE conditional comments).
$this->_html = preg_replace_callback(
'/<!--([\\s\\S]*?)-->/'
,[$this, '_commentCB']
,$this->_html);
// replace PREs with placeholders
$this->_html = preg_replace_callback('/\\s*(<pre\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i'
,[$this, '_removePreCB']
,$this->_html);
// replace TEXTAREAs with placeholders
$this->_html = preg_replace_callback(
'/\\s*(<textarea\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i'
,[$this, '_removeTextareaCB']
,$this->_html);
// trim each line.
$this->_html = preg_replace('/^\\s+|\\s+$/m', '', $this->_html);
// remove ws around block/undisplayed elements
$this->_html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body'
.'|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form'
.'|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta'
.'|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)'
.'|ul)\\b[^>]*>)/i', '$1', $this->_html);
// remove ws outside of all elements
$this->_html = preg_replace_callback(
'/>([^<]+)</'
,[$this, '_outsideTagCB']
,$this->_html);
// use newlines before 1st attribute in open tags (to limit line lengths)
$this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);
// fill placeholders
$this->_html = str_replace(
array_keys($this->_placeholders)
,array_values($this->_placeholders)
,$this->_html
);
return str_replace("\n",' ',$this->_html);
}
protected function _commentCB($m){
return (0 === strpos($m[1], '[') || false !== strpos($m[1], '<!['))? $m[0]: '';
}
protected function _reservePlace($content){
$placeholder = '%' . $this->_replacementHash . count($this->_placeholders) . '%';
$this->_placeholders[$placeholder] = $content;
return $placeholder;
}
protected function _outsideTagCB($m){
return '>' . preg_replace('/^\\s+|\\s+$/', ' ', $m[1]) . '<';
}
protected function _removePreCB($m){
return $this->_reservePlace($m[1]);
}
protected function _removeTextareaCB($m){
return $this->_reservePlace($m[1]);
}
protected function _removeStyleCB($m){
$openStyle = $m[1];
$css = $m[2];
// remove HTML comments
$css = preg_replace('/(?:^\\s*<!--|-->\\s*$)/', '', $css);
// remove CDATA section markers
$css = $this->_removeCdata($css);
// minify
$css = self::CSS($css);
return $this->_reservePlace($this->_needsCdata($css)
? "{$openStyle}/*<![CDATA[*/{$css}/*]]>*/</style>"
: "{$openStyle}{$css}</style>"
);
}
protected function _removeScriptCB($m){
$openScript = $m[2];
$js = $m[3];
// whitespace surrounding? preserve at least one space
$ws1 = ($m[1] === '') ? '' : ' ';
$ws2 = ($m[4] === '') ? '' : ' ';
// remove HTML comments (and ending "//" if present)
$js = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $js);
// remove CDATA section markers
$js = $this->_removeCdata($js);
// minify
$js = $this->minifyJS($js);
return $this->_reservePlace($this->_needsCdata($js)
? "{$ws1}{$openScript}/*<![CDATA[*/{$js}/*]]>*/</script>{$ws2}"
: "{$ws1}{$openScript}{$js}</script>{$ws2}"
);
}
protected function _removeCdata($str){
return (false !== strpos($str, '<![CDATA['))? str_replace(['<![CDATA[', ']]>'], '', $str): $str;
}
protected function _needsCdata($str){
return ($this->_isXhtml && preg_match('/(?:[<&]|\\-\\-|\\]\\]>)/', $str));
}
const ORD_LF = 10;
const ORD_SPACE = 32;
const ACTION_KEEP_A = 1;
const ACTION_DELETE_A = 2;
const ACTION_DELETE_A_B = 3;
protected $a = "\n";
protected $b = '';
protected $input = '';
protected $inputIndex = 0;
protected $inputLength = 0;
protected $lookAhead = null;
protected $output = '';
protected $lastByteOut = '';
protected $preserve_important_comments = true;
function minifyJS($input,$pic=false){
$this->a = "\n";
$this->b = '';
$this->inputIndex = 0;
$this->inputLength = 0;
$this->lookAhead = null;
$this->output = '';
$this->lastByteOut = '';
$this->preserve_important_comments = $pic;
$this->input = $input;
$mbIntEnc = null;
if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) {
$mbIntEnc = mb_internal_encoding();
mb_internal_encoding('8bit');
}
$this->input = str_replace("\r\n", "\n", $this->input);
$this->inputLength = strlen($this->input);
$this->action(self::ACTION_DELETE_A_B);
while ($this->a !== null) {
// determine next command
$command = self::ACTION_KEEP_A; // default
if ($this->a === ' ') {
if (($this->lastByteOut === '+' || $this->lastByteOut === '-')
&& ($this->b === $this->lastByteOut)) {
// Don't delete this space. If we do, the addition/subtraction
// could be parsed as a post-increment
} elseif (! $this->isAlphaNum($this->b)) {
$command = self::ACTION_DELETE_A;
}
} elseif ($this->a === "\n") {
if ($this->b === ' ') {
$command = self::ACTION_DELETE_A_B;
// in case of mbstring.func_overload & 2, must check for null b,
// otherwise mb_strpos will give WARNING
} elseif ($this->b === null
|| (false === strpos('{[(+-', $this->b)
&& ! $this->isAlphaNum($this->b))) {
$command = self::ACTION_DELETE_A;
}
} elseif (! $this->isAlphaNum($this->a)) {
if ($this->b === ' '
|| ($this->b === "\n"
&& (false === strpos('}])+-"\'', $this->a)))) {
$command = self::ACTION_DELETE_A_B;
}
}
$this->action($command);
}
$this->output = trim($this->output);
if ($mbIntEnc !== null) {
mb_internal_encoding($mbIntEnc);
}
return $this->output;
}
/**
* ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
* ACTION_DELETE_A = Copy B to A. Get the next B.
* ACTION_DELETE_A_B = Get the next B.
*/
protected function action($command)
{
if ($command === self::ACTION_DELETE_A_B
&& $this->b === ' '
&& ($this->a === '+' || $this->a === '-')) {
// Note: we're at an addition/substraction operator; the inputIndex
// will certainly be a valid index
if ($this->input[$this->inputIndex] === $this->a) {
// This is "+ +" or "- -". Don't delete the space.
$command = self::ACTION_KEEP_A;
}
}
switch ($command) {
case self::ACTION_KEEP_A:
$this->output .= $this->a;
$this->lastByteOut = $this->a;
// fallthrough
case self::ACTION_DELETE_A:
$this->a = $this->b;
if ($this->a === "'" || $this->a === '"') { // string literal
$str = $this->a; // in case needed for exception
while (true) {
$this->output .= $this->a;
$this->lastByteOut = $this->a;
$this->a = $this->get();
if ($this->a === $this->b) { // end quote
break;
}
if (ord($this->a) <= self::ORD_LF) {
throw new \Exception(
"JSMin: Unterminated String at byte "
. $this->inputIndex . ": {$str}");
}
$str .= $this->a;
if ($this->a === '\\') {
$this->output .= $this->a;
$this->lastByteOut = $this->a;
$this->a = $this->get();
$str .= $this->a;
}
}
}
// fallthrough
case self::ACTION_DELETE_A_B:
$this->b = $this->next();
if ($this->b === '/' && $this->isRegexpLiteral()) { // RegExp literal
$this->output .= $this->a . $this->b;
$pattern = '/'; // in case needed for exception
while (true) {
$this->a = $this->get();
$pattern .= $this->a;
if ($this->a === '/') { // end pattern
break; // while (true)
} elseif ($this->a === '\\') {
$this->output .= $this->a;
$this->a = $this->get();
$pattern .= $this->a;
} elseif (ord($this->a) <= self::ORD_LF) {
throw new \Exception(
"JSMin: Unterminated RegExp at byte "
. $this->inputIndex .": {$pattern}");
}
$this->output .= $this->a;
$this->lastByteOut = $this->a;
}
$this->b = $this->next();
}
// end case ACTION_DELETE_A_B
}
}
protected function isRegexpLiteral()
{
if (false !== strpos("\n{;(,=:[!&|?", $this->a)) { // we aren't dividing
return true;
}
if (' ' === $this->a) {
$length = strlen($this->output);
if ($length < 2) { // weird edge case
return true;
}
// you can't divide a keyword
if (preg_match('/(?:case|else|in|return|typeof)$/', $this->output, $m)) {
if ($this->output === $m[0]) { // odd but could happen
return true;
}
// make sure it's a keyword, not end of an identifier
$charBeforeKeyword = substr($this->output, $length - strlen($m[0]) - 1, 1);
if (! $this->isAlphaNum($charBeforeKeyword)) {
return true;
}
}
}
return false;
}
/**
* Get next char. Convert ctrl char to space.
*/
protected function get()
{
$c = $this->lookAhead;
$this->lookAhead = null;
if ($c === null) {
if ($this->inputIndex < $this->inputLength) {
$c = $this->input[$this->inputIndex];
$this->inputIndex += 1;
} else {
return null;
}
}
if ($c === "\r" || $c === "\n") {
return "\n";
}
if (ord($c) < self::ORD_SPACE) { // control char
return ' ';
}
return $c;
}
/**
* Get next char. If is ctrl character, translate to a space or newline.
*/
protected function peek()
{
$this->lookAhead = $this->get();
return $this->lookAhead;
}
/**
* Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII?
*/
protected function isAlphaNum($c)
{
return (preg_match('/^[0-9a-zA-Z_\\$\\\\]$/', $c) || ord($c) > 126);
}
protected function singleLineComment()
{
$comment = '';
while (true) {
$get = $this->get();
$comment .= $get;
if (ord($get) <= self::ORD_LF) { // EOL reached
// if IE conditional comment
if (preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
return "/{$comment}";
}
return $get;
}
}
}
protected function multipleLineComment()
{
$this->get();
$comment = '';
while (true) {
$get = $this->get();
if ($get === '*') {
if ($this->peek() === '/') { // end of comment reached
$this->get();
// if comment preserved by YUI Compressor
if (0 === strpos($comment, '!')) {
if($this->preserve_important_comments){
return "\n/*!" . substr($comment, 1) . "*/\n";
}
else{
return "\n";
}
}
// if IE conditional comment
if (preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
return "/*{$comment}*/";
}
return ' ';
}
} elseif ($get === null) {
throw new \Exception(
"JSMin: Unterminated comment at byte "
. $this->inputIndex . ": /*{$comment}");
}
$comment .= $get;
}
}
protected function next()
{
$get = $this->get();
if ($get !== '/') {
return $get;
}
switch ($this->peek()) {
case '/': return $this->singleLineComment();
case '*': return $this->multipleLineComment();
default: return $get;
}
}
}