How can I extract specific information from CSS files using PHP?

Parsing CSS Files with PHP

When working with CSS files, it can be beneficial to have the ability to parse and extract specific information, such as class names containing a particular string. To accomplish this with PHP, a user on a programming forum devised a solution that involves:

The Solution:

The solution involves defining a PHP function called "parse()" that takes a CSS file as an argument. This function uses regular expressions to match all CSS rules in the file and extracts the selector and rules into arrays. The result is an associative array where each key is a selector (e.g., "#content") and the corresponding value is an array of rules for that selector.

Code Implementation:

<br>function parse($file){</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">$css = file_get_contents($file);
preg_match_all( '/(?ims)([a-z0-9\s\.\:#_\-@,]+)\{([^\}]*)\}/', $css, $arr);
$result = array();
foreach ($arr[0] as $i => $x){
    $selector = trim($arr[1][$i]);
    $rules = explode(';', trim($arr[2][$i]));
    $rules_arr = array();
    foreach ($rules as $strRule){
        if (!empty($strRule)){
            $rule = explode(&quot;:&quot;, $strRule);
            $rules_arr[trim($rule[0])] = trim($rule[1]);
        }
    }
    
    $selectors = explode(',', trim($selector));
    foreach ($selectors as $strSel){
        $result[$strSel] = $rules_arr;
    }
}
return $result;