add files

inc/compress-html.php

@@ -0,0 +1,153 @@
+<?php
+class WP_HTML_Compression
+{
+
+    protected bool $compress_css = true;
+    protected bool $compress_js = true;
+    protected bool $info_comment = false;
+    protected bool $remove_comments = true;
+
+    protected string $html;
+    public function __construct($html)
+    {
+        if (!empty($html))
+        {
+            $this->parseHTML($html);
+        }
+    }
+    public function __toString() : string
+    {
+        return $this->html;
+    }
+    protected function bottomComment(string $raw = "", string $compressed = "") : string
+    {
+
+        $raw = strlen($raw);
+
+        $compressed = strlen($compressed);
+
+        $savings = ($raw-$compressed) / $raw * 100;
+
+        $savings = round($savings, 2);
+
+        return '<!--HTML compressed, size saved '.$savings.'%. From '.$raw.' bytes, now '.$compressed.' bytes-->';
+
+    }
+    protected function minifyHTML(string $html = "") : string
+    {
+
+        $pattern = '/<(?<script>script).*?<\/script\s*>|<(?<style>style).*?<\/style\s*>|<!(?<comment>--).*?-->|<(?<tag>[\/\w.:-]*)(?:".*?"|\'.*?\'|[^\'">]+)*>|(?<text>((<[^!\/\w.:-])?[^<]*)+)|/si';
+
+        preg_match_all($pattern, $html, $matches, PREG_SET_ORDER);
+
+        $overriding = false;
+        $raw_tag = false;
+
+
+        $html = '';
+
+        foreach ($matches as $token)
+        {
+            $tag = (isset($token['tag'])) ? strtolower($token['tag']) : null;
+
+            $content = $token[0];
+
+            if (is_null($tag))
+            {
+                if ( !empty($token['script']) )
+                {
+                    $strip = $this->compress_js;
+                }
+                else if ( !empty($token['style']) )
+                {
+                    $strip = $this->compress_css;
+                }
+                else if ($content == '<!--wp-html-compression no compression-->')
+                {
+                    $overriding = !$overriding;
+
+                    continue;
+                }
+                else if ($this->remove_comments)
+                {
+                    if (!$overriding && $raw_tag != 'textarea')
+                    {
+                        $content = preg_replace('/<!--(?!\s*(?:\[if [^\]]+]|<!|>))(?:(?!-->).)*-->/s', '', $content);
+                    }
+                }
+            }
+            else
+            {
+                if ($tag == 'pre' || $tag == 'textarea')
+                {
+                    $raw_tag = $tag;
+                }
+                else if ($tag == '/pre' || $tag == '/textarea')
+                {
+                    $raw_tag = false;
+                }
+                else
+                {
+                    if ($raw_tag || $overriding)
+                    {
+                        $strip = false;
+                    }
+                    else
+                    {
+                        $strip = true;
+
+                        $content = preg_replace('/(\s+)(\w++(?<!\baction|\balt|\bcontent|\bsrc)="")/', '$1', $content);
+
+                        $content = str_replace(' />', '/>', $content);
+                    }
+                }
+            }
+
+            if ($strip)
+            {
+                $content = $this->removeWhiteSpace($content);
+            }
+
+            $html .= $content;
+        }
+
+        return $html;
+    }
+
+    public function parseHTML(string $html = "") : void
+    {
+        $this->html = $this->minifyHTML($html);
+
+        if ($this->info_comment)
+        {
+            $this->html .= "\n" . $this->bottomComment($html, $this->html);
+        }
+    }
+
+    protected function removeWhiteSpace(string $str = "") : string
+    {
+        $str = str_replace("\t", ' ', $str);
+        $str = str_replace("\n",  '', $str);
+        $str = str_replace("\r",  '', $str);
+
+        while (stristr($str, '  '))
+        {
+            $str = str_replace('  ', ' ', $str);
+        }
+
+        return $str;
+    }
+}
+
+function wp_html_compression_finish(string $html)
+{
+    return new WP_HTML_Compression($html);
+}
+
+function wp_html_compression_start() : void
+{
+    if (!is_user_logged_in() && !is_feed() && !is_yn()){
+        ob_start('wp_html_compression_finish');
+    }
+}
+add_action('wp', 'wp_html_compression_start');