Find un-minified CSS files in a website

find-big-css-files.php

<?php

/**
 * Find the number of unminified CSS files on a website
 * @param  string  $url            The root URL of the website to test
 * @param  integer $lines_per_file What's the max number of lines a minified CSS file should have?
 * @return integer                 Number of CSS files on a website that aren't minified
 */
function how_many_unminified_css_files( $url, $lines_per_file = 3 )
    $unminimized_css_files = 0;

    // Get the website's HTML
    $html = file_get_contents( $url );

    // Find all local css files
    preg_match( "/({$url}.*\.css)/gi", $html, $css_files );

    // Remove the global match that preg_match returns
    array_shift( $css_files );

    // Loop through all the local CSS files
    // And count how many lines they have
    foreach( $css_files as $css_file ) {
        $linecount = 0;

        // "Open" the CSS file
        $handle = fopen($css_file, "r");

        // Count the number of lines
        while(!feof($handle)){
          $line = fgets($handle);
          $linecount++;
        }

        // Close the CSS file
        fclose($handle);

        // If the CSS file has more lines than we deem appropriate, 
        // we'll consider it not minified
        if ( $linecount > $lines_per_file ) {
            $unminimized_css_files++;
        }
    }

    // Return the number of files that we don't think are minified
    return $unminimized_css_files;
}