mirror of
https://github.com/mrclay/minify.git
synced 2025-02-22 16:04:08 +01:00
179 lines
6.0 KiB
PHP
179 lines
6.0 KiB
PHP
<?php
|
|
/**
|
|
* Class Minify_HTML
|
|
* @package Minify
|
|
*/
|
|
|
|
/**
|
|
* Compress HTML
|
|
*
|
|
* This is a heavy regex-based removal of whitespace, unnecessary
|
|
* comments and tokens.
|
|
*
|
|
* IE conditional comments are preserved. There are also options to have STYLE
|
|
* and SCRIPT blocks compressed by callback functions. A test suite is available.
|
|
*
|
|
* @package Minify
|
|
* @author Stephen Clay <steve@mrclay.org>
|
|
*/
|
|
class Minify_HTML {
|
|
|
|
/**
|
|
* "Minify" an HTML page
|
|
*
|
|
* @todo: To also minify embedded Javascript/CSS, you must...
|
|
*
|
|
*/
|
|
public static function minify($string, $options = array()) {
|
|
|
|
if (isset($options['cssMinifier'])) {
|
|
self::$_cssMinifier = $options['cssMinifier'];
|
|
}
|
|
if (isset($options['jsMinifier'])) {
|
|
self::$_jsMinifier = $options['jsMinifier'];
|
|
}
|
|
|
|
$html = trim($string);
|
|
|
|
self::$_isXhtml = (false !== strpos($html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
|
|
|
|
self::$_replacementHash = 'MINIFYHTML' . md5(time());
|
|
|
|
// remove SCRIPTs (and minify)
|
|
$html = preg_replace_callback('/\\s*(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>\\s*/i',
|
|
array('Minify_HTML', '_removeScriptCB'), $html);
|
|
|
|
// remove STYLEs (and minify)
|
|
$html = preg_replace_callback('/\\s*(<style\\b[^>]*?>)([\\s\\S]*?)<\\/style>\\s*/i',
|
|
array('Minify_HTML', '_removeStyleCB'), $html);
|
|
|
|
// remove HTML comments (but not IE conditional comments).
|
|
$html = preg_replace('/<!--[^\\[][\\s\\S]*?-->/', '', $html);
|
|
|
|
// replace PREs with token text
|
|
self::$_pres = array();
|
|
$html = preg_replace_callback('/\\s*(<pre\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i'
|
|
,array('Minify_HTML', '_removePreCB')
|
|
, $html);
|
|
|
|
// remove leading and trailing ws from each line.
|
|
// @todo take into account attribute values that span multiple lines.
|
|
$html = preg_replace('/^\\s*(.*?)\\s*$/m', "$1", $html);
|
|
|
|
// remove ws around block/undisplayed elements
|
|
$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)|title'
|
|
.'|ul)\\b[^>]*>)/i', '$1', $html);
|
|
|
|
// remove ws between and inside elements.
|
|
$html = preg_replace('/>\\s+(\\S[\\s\\S]*?)?</', "> $1<", $html);
|
|
$html = preg_replace('/>(\\S[\\s\\S]*?)?\\s+</', ">$1 <", $html);
|
|
$html = preg_replace('/>\\s+</', "> <", $html);
|
|
|
|
// replace PREs
|
|
$i = count(self::$_pres);
|
|
while ($i > 0) {
|
|
$rep = array_pop(self::$_pres);
|
|
$html = str_replace(self::$_replacementHash . 'PRE' . $i, $rep, $html);
|
|
$i--;
|
|
}
|
|
|
|
// replace SCRIPTs
|
|
$i = count(self::$_scripts);
|
|
while ($i > 0) {
|
|
$rep = array_pop(self::$_scripts);
|
|
$html = str_replace(self::$_replacementHash . 'SCRIPT' . $i, $rep, $html);
|
|
$i--;
|
|
}
|
|
|
|
// replace STYLEs
|
|
$i = count(self::$_styles);
|
|
while ($i > 0) {
|
|
$rep = array_pop(self::$_styles);
|
|
$html = str_replace(self::$_replacementHash . 'STYLE' . $i, $rep, $html);
|
|
$i--;
|
|
}
|
|
|
|
self::$_cssMinifier = self::$_jsMinifier = null;
|
|
return $html;
|
|
}
|
|
|
|
protected static $_isXhtml = false;
|
|
protected static $_replacementHash = null;
|
|
protected static $_pres = array();
|
|
protected static $_scripts = array();
|
|
protected static $_styles = array();
|
|
protected static $_cssMinifier = null;
|
|
protected static $_jsMinifier = null;
|
|
|
|
protected static function _removePreCB($m)
|
|
{
|
|
self::$_pres[] = $m[1];
|
|
return self::$_replacementHash . 'PRE' . count(self::$_pres);
|
|
}
|
|
|
|
protected static function _removeStyleCB($m)
|
|
{
|
|
$openStyle = $m[1];
|
|
$css = $m[2];
|
|
// remove HTML comments
|
|
$css = preg_replace('/(?:^\\s*<!--|-->\\s*$)/', '', $css);
|
|
|
|
// remove CDATA section markers
|
|
$css = self::_removeCdata($css);
|
|
|
|
// minify
|
|
$minifier = self::$_cssMinifier
|
|
? self::$_cssMinifier
|
|
: 'trim';
|
|
$css = call_user_func($minifier, $css);
|
|
|
|
// store
|
|
self::$_styles[] = self::_needsCdata($css)
|
|
? "{$openStyle}/*<![CDATA[*/{$css}/*]]>*/</style>"
|
|
: "{$openStyle}{$css}</style>";
|
|
|
|
|
|
return self::$_replacementHash . 'STYLE' . count(self::$_styles);
|
|
}
|
|
|
|
protected static function _removeScriptCB($m)
|
|
{
|
|
$openScript = $m[1];
|
|
$js = $m[2];
|
|
|
|
// remove HTML comments (and ending "//" if present)
|
|
$js = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $js);
|
|
|
|
// remove CDATA section markers
|
|
$js = self::_removeCdata($js);
|
|
|
|
// minify
|
|
$minifier = self::$_jsMinifier
|
|
? self::$_jsMinifier
|
|
: 'trim';
|
|
$js = call_user_func($minifier, $js);
|
|
|
|
// store
|
|
self::$_scripts[] = self::_needsCdata($js)
|
|
? "{$openScript}/*<![CDATA[*/{$js}/*]]>*/</script>"
|
|
: "{$openScript}{$js}</script>";
|
|
return self::$_replacementHash . 'SCRIPT' . count(self::$_scripts);
|
|
}
|
|
|
|
protected static function _removeCdata($str)
|
|
{
|
|
return (false !== strpos($str, '<![CDATA['))
|
|
? str_replace(array('<![CDATA[', ']]>'), '', $str)
|
|
: $str;
|
|
}
|
|
|
|
protected static function _needsCdata($str)
|
|
{
|
|
return (self::$_isXhtml && preg_match('/(?:[<&]|\\-\\-|\\]\\]>)/', $str));
|
|
}
|
|
}
|
|
|