How to compress html output in php? [duplicate]

Question

Possible Duplicate:
How to minify php page html output?

I mean strip out all the line breaks and spaces in html and puts it on one line.

I tried this function

public static function htmlCompress($html)
{
    preg_match_all('!(<(?:code|pre|script).*>[^<]+</(?:code|pre|script)>)!',$html,$pre);
    $html = preg_replace('!<(?:code|pre).*>[^<]+</(?:code|pre)>!', '#pre#', $html);
    $html = preg_replace('#<!–[^\[].+–>#', '', $html);
    $html = preg_replace('/[\r\n\t]+/', ' ', $html);
    $html = preg_replace('/>[\s]+</', '><', $html);
    $html = preg_replace('/[\s]+/', ' ', $html);
    if (!empty($pre[0])) {
        foreach ($pre[0] as $tag) {
            $html = preg_replace('!#pre#!', $tag, $html,1);
        }
    }
    return $html;
}

but sometimes appears symbols like "�" because of this string

$html = preg_replace('/[\s]+/', ' ', $html);

Why appears this symbol and how to compress html?

That usually means there is a mismatch in your character sets, for instance, one is ASCII and the other UTF-8. — Jared Farrish
– Jared Farrish, Commented Jul 23, 2011 at 21:53
You achieve more by just gzipping the content. HTML minifaction is only useful for sites with massive userbases. — Gordon
– Gordon, Commented Jul 23, 2011 at 21:53
@Ibu that's a Java library. Can be used in conjunction with PHP of course (the question's about PHP), just saying...a PHP solution probably makes more sense here. — Matt Browne
– Matt Browne, Commented Feb 26, 2013 at 4:01
This function have a bug; line-breaks get damaged when pre include html-tags. — user706420
– user706420, Commented Feb 3, 2015 at 8:41

Julian · Accepted Answer · 2011-07-23 21:52:55Z

5

\s should not appear in square brackets, i.e. this is correct:

$html = preg_replace('/\s+/', ' ', $html);

answered Jul 23, 2011 at 21:52

Julian

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1 Comment

Codebeat Over a year ago

Wonderful and simple, thanks. It is the only one that does not break the code. One suggestion to add: $html = str_replace( '> <', '><', $html );

SeanCannon · Accepted Answer · 2011-07-23 21:52:58Z

4

That symbol means it's a foreign character and your particular font doesn't know what character it needs to use. You should look into multibyte-safe string functions and UTF-8 encoding and decoding

answered Jul 23, 2011 at 21:52

SeanCannon

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Comments

Alan B. Dee · Accepted Answer · 2011-07-23 21:55:15Z

1

Look into output buffering: http://www.php.net/manual/en/ref.outcontrol.php and http://php.net/manual/en/function.gzcompress.php (if your apache server is configured to handle compression.) Any more then that will likely cause more overhead then you would gain.

So, use the ob_buffer to get your output as a string. Compress the string, and send it out.

answered Jul 23, 2011 at 21:55

Alan B. Dee

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