PHP code example of perfectpanel / extlib-crossjoin-css

1. Go to this page and download the library: Download perfectpanel/extlib-crossjoin-css library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

perfectpanel / extlib-crossjoin-css example snippets


// Read CSS file
$cssFileName = "path/to/file.css";
$reader = new \Crossjoin\Css\Reader\CssFile($cssFileName);

// Read CSS string
$cssString = "body { background:red; }";
$reader = new \Crossjoin\Css\Reader\CssFile($cssString);

// Extract CSS from <style> tags in a HTML file
// (multiple tags are merges to one style sheet)
$htmlFileName = "path/to/file.html";
$reader = new \Crossjoin\Css\Reader\HtmlFile($htmlFileName);

// Extract CSS from <style> tags in a HTML string
// (multiple tags are merges to one style sheet)
$htmlString = "<html><head><style>body{color:red;}</style></head><body></body></html>";
$reader = new \Crossjoin\Css\Reader\HtmlFile($htmlString);


// Sets the environment encoding of the referencing (!) document, e.g. if defined 
// in a link tag of an HTML page.
// This is used as a fall back value to determine the charset of the CSS file.
$reader->setEnvironmentEncoding("UTF-8");


// Gets the CSS content in compact format (no comments, no line breaks,...)
$writer = new \Crossjoin\Css\Writer\Compact($reader->getStyleSheet());
$cssContent = $writer->getContent();

// Gets the CSS content in prettified format
// (with comments, line breaks, indentations,...)
$writer = new \Crossjoin\Css\Writer\Pretty($reader->getStyleSheet());
$cssContent = $writer->getContent();


$cssString = 'body{color:black} @charset "UTF-8"; @media print{@page{margin:1cm;}}';
$reader = new \Crossjoin\Css\Reader\CssString($cssString);
$writer = new \Crossjoin\Css\Writer\Pretty($reader->getStyleSheet());
$content = $writer->getContent();
$errors = $writer->getErrors();

print_r($content);
// body { color: black; }

print_r($errors);
// Array (
// [0] => Ignored @charset rule, because at wrong position in style sheet.
// [1] => Rule instance of type 'Crossjoin\Css\Format\Rule\AtPage\PageRule'
//        not allowed in conditional group rule of type
//        'Crossjoin\Css\Format\Rule\AtMedia\MediaRule'.
// [2] => Empty media at-rule '@media print' ignored.
// )