Parse a CSS File with PHP
In PHP, parsing a CSS file requires special techniques to extract specific information. To illustrate, let's consider the task of retrieving class names containing "postclass" from a CSS file.
To achieve this, we can leverage regular expressions. Here's a solution:
<code class="php">function parse($file){
$css = file_get_contents($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(":", $strRule);
$rules_arr[trim($rule[0])] = trim($rule[1]);
}
}
$selectors = explode(',', trim($selector));
foreach ($selectors as $strSel){
$result[$strSel] = $rules_arr;
}
}
return $result;
}</code>With this function, you can parse a CSS file and access specific classes and their properties. For instance, to retrieve the color property of the "#selector" class, use:
<code class="php">$css = parse('css/'.$user['blog'].'.php');
$css['#selector']['color'];</code>This solution allows you to parse CSS files dynamically in your PHP applications, extracting tailored information based on user-defined criteria.
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