Using PHP to minify JavaScript, HTML, and CSS WITHIN A STRING

Asked 10/7, 2013 at 16:25 Answered 4/10, 2023 at 12:22

All of the PHP minify functions I've seen have dealt with physical JavaScript, HTML, CSS files. I would like a function that, when given something like this:

$code = "<html>
    <body>";

Will minify it to one line. I am not looking for something like the YUI Compressor, as that deals with files on a server. I would simply like a function that minifies a string passed to it. Does this exist anywhere?

Pennate answered 10/7, 2013 at 16:25 Comment(3)

You should be able to mock a file using the SPL. Put the string into the file. Pass it the the known minify functions. – Tildi 10/7, 2013 at 16:29

That sounds pretty inefficient though. Is there a straight-up function that does it? – Pennate 10/7, 2013 at 16:50

Maybe, Maybe not. The SPL has a mock file, that you can put n memory. I'm not sure how inefficient it is. see; php.net/manual/en/spltempfileobject.construct.php – Tildi 10/7, 2013 at 17:1

You may be looking for:

$code = "<html>
    <body>";

echo str_replace(array("\r", "\n"), '', $code);

Betroth answered 10/7, 2013 at 17:4 Comment(9)

Well, I'm looking for a complete minification function, so you could pass, say, the front-end source code for Google to it. – Pennate 10/7, 2013 at 17:8

And it would do what? Fetch all the assets (e.g. external JS/CSS/images etc) and inline/minify them? What are you trying to do? developers.google.com/speed/pagespeed/module might be a good tool to solve whatever it is you are doing? – Betroth 10/7, 2013 at 18:5

I simply would like to have a function that minifies a STRING of HTML/CSS/JS, not a FILE – Pennate 10/7, 2013 at 18:19

How is it any different? The code will read the file into a string, minify the string, then write back to the file. github.com/mrclay/minify/tree/master/min/lib is the code for PHP Minify - you'll see the functions needed in there. – Betroth 10/7, 2013 at 19:2

So I would use fwrite, etc. to write the file, then open it and pass it into that function? – Pennate 10/7, 2013 at 20:5

You could, or just call the functions on a string – minify($html, $options = array()) is in github.com/mrclay/minify/blob/master/min/lib/Minify/HTML.php. – Betroth 10/7, 2013 at 20:16

Ah, so if I passed the HTML/JS/CSS string to that function, it would return me with a string? – Pennate 10/7, 2013 at 20:25

I actually ended up using the JSMin.php file; thanks for the help! – Pennate 10/7, 2013 at 20:40

So bad way, this will break inline js – Biodynamics 23/4, 2020 at 5:12

I never tried these ones, but I came across them once:

For JavaScript and CSS:

http://castlesblog.com/2010/august/14/php-javascript-css-minification

Anxious answered 10/7, 2013 at 16:53 Comment(2)

Thanks for the answer, but this is for external files, not strings. – Pennate 10/7, 2013 at 16:59

The link is broken: "It looks like the page your are looking for is missing. Please check the address or try another page." – Potentiate 4/7, 2019 at 9:51

This one worked for me:

$out = file_get_contents(__DIR__ . '/page.html');
$replace = ["\r", "\t", "\n"];
for ($i = 2; $i <= 50; $i++) {
    $replace[] = str_repeat(' ', $i);
}
file_put_contents(__DIR__ . '/page.html', str_replace($replace, '', $out));

and more easy with regex

$out = file_get_contents(__DIR__ . '/page.html');
file_put_contents(__DIR__ . '/output.html', preg_replace("/(\s{2,}|\t|\r|\n)/i",'',$out));

Used answered 4/10, 2023 at 12:22 Comment(0)

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