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March 24, 2024 15:48
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Save vandanojan/c13c70513c0367e486e90a8bb397d260 to your computer and use it in GitHub Desktop.
To minify HTML, add the following code snippet to the end of your theme's functions.php
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class FLHM_HTML_Compression | |
{ | |
protected $flhm_compress_css = true; | |
protected $flhm_compress_js = true; | |
protected $flhm_info_comment = true; | |
protected $flhm_remove_comments = true; | |
protected $html; | |
public function __construct($html) | |
{ | |
if (!empty($html)) | |
{ | |
$this->flhm_parseHTML($html); | |
} | |
} | |
public function __toString() | |
{ | |
return $this->html; | |
} | |
protected function flhm_bottomComment($raw, $compressed) | |
{ | |
$raw = strlen($raw); | |
$compressed = strlen($compressed); | |
$savings = ($raw-$compressed) / $raw * 100; | |
$savings = round($savings, 2); | |
return '<!--HTML compressed, size saved '.$savings.'%. From '.$raw.' bytes, now '.$compressed.' bytes-->'; | |
} | |
protected function flhm_minifyHTML($html) | |
{ | |
$pattern = '/<(?<script>script).*?<\/script\s*>|<(?<style>style).*?<\/style\s*>|<!(?<comment>--).*?-->|<(?<tag>[\/\w.:-]*)(?:".*?"|\'.*?\'|[^\'">]+)*>|(?<text>((<[^!\/\w.:-])?[^<]*)+)|/si'; | |
preg_match_all($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 = $this->flhm_compress_js; | |
} | |
else if ( !empty($token['style']) ) | |
{ | |
$strip = $this->flhm_compress_css; | |
} | |
else if ($content == '<!--wp-html-compression no compression-->') | |
{ | |
$overriding = !$overriding; | |
continue; | |
} | |
else if ($this->flhm_remove_comments) | |
{ | |
if (!$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 = $this->flhm_removeWhiteSpace($content); | |
} | |
$html .= $content; | |
} | |
return $html; | |
} | |
public function flhm_parseHTML($html) | |
{ | |
$this->html = $this->flhm_minifyHTML($html); | |
if ($this->flhm_info_comment) | |
{ | |
$this->html .= "\n" . $this->flhm_bottomComment($html, $this->html); | |
} | |
} | |
protected function flhm_removeWhiteSpace($str) | |
{ | |
$str = str_replace("\t", ' ', $str); | |
$str = str_replace("\n", '', $str); | |
$str = str_replace("\r", '', $str); | |
$str = str_replace("// The customizer requires postMessage and CORS (if the site is cross domain).",'',$str); | |
while (stristr($str, ' ')) | |
{ | |
$str = str_replace(' ', ' ', $str); | |
} | |
return $str; | |
} | |
} | |
function flhm_wp_html_compression_finish($html) | |
{ | |
return new FLHM_HTML_Compression($html); | |
} | |
function flhm_wp_html_compression_start() | |
{ | |
ob_start('flhm_wp_html_compression_finish'); | |
} | |
add_action('get_header', 'flhm_wp_html_compression_start'); |
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