Parse a CSS file with PHP

Question

I want to parse (in a special way) a CSS file with PHP.

Example:

cssfile.css:

#stuff {
    background-color: red;
}

#content.postclass-subcontent {
    background-color: red;
}

#content2.postclass-subcontent2 {
    background-color: red;
}

And I want that PHP returns me each class name that have the postclass in its name.

The result look like an array having in this example:

arrayentry1:
#content.postclass-subcontent
arrayentry2:
#content2.postclass-subcontent2

But I'm worse at regular expressions. somehow search for "postclass" and then grap the hole line and put into an array.

---

thank you and i used it to parse a css file simliar to a confic file.

$(function () {
    $.get('main.css', function (data) {
        data = data.match(/(#[a-z0-9]*?\ .?postclass.*?)\s?\{/g);
        if (data) {
            $.each(data, function (index, value) {
                value = value.substring(0, value.length - 2);
                $(value.split(' .')[0]).wrapInner('<div class="' + value.split('.')[1] + '" />');
            });
        }
    });
});

was my final code. so i can wrap easily a div around some hardcode-html without editing the layout. so i just have to edit my cssfile and add there something like

id .postclass-class { some styles }

and my code searchs for the id and wraps the inner content with an div. i needed that for quickfixes when i just have to add a div around something for a clear or a background.

Answer 1

There is a very good CSS parser class in PHP. Use it. Here is its sample code:

<?php
include("cssparser.php");

$css = new cssparser();
$css->ParseStr("b {font-weight: bold; color: #777777;} b.test{text-decoration: underline;}");
echo $css->Get("b","color");     // returns #777777
echo $css->Get("b.test","color");// returns #777777
echo $css->Get(".test","color"); // returns an empty string
?> 

Answer 2

Here is a quick and dirty standalone hack using regex:

$input = '
#stuff {
    background-color: red;
}

#content.postclass-subcontent {
    background-color: red;
}

#content2.postclass-subcontent2 {
    background-color: red;
}
';

$cssClassName = 'postclass';
preg_match_all('/(#[a-z0-9]*?\.?'.addcslashes($cssClassName, '-').'.*?)\s?\{/', $input, $matches);
var_dump($matches[1]);

Results in:

array(2) {
  [0]=>
  string(29) "#content.postclass-subcontent"
  [1]=>
  string(31) "#content2.postclass-subcontent2"
}

Answer 3

<?php

$css = <<<CSS
#selector { display:block; width:100px; }
#selector a { float:left; text-decoration:none }
CSS;

//
function BreakCSS($css)
{

    $results = array();

    preg_match_all('/(.+?)\s?\{\s?(.+?)\s?\}/', $css, $matches);
    foreach($matches[0] AS $i=>$original)
        foreach(explode(';', $matches[2][$i]) AS $attr)
                if (strlen($attr) > 0) // for missing semicolon on last element, which is legal
                {
                        list($name, $value) = sexplode(':', $attr);
                        $results[$matches[1][$i]][trim($name)] = trim($value);
                }
    return $results;
}
var_dump(BreakCSS($css));

//see its same