How to convert styles in PHP files into CSS style sheets

PHP file exports CSS style sheet CSS style sheet is a style definition language used in web development to control the layout and display effects of HTML documents. In website development, we often encounter situations where we need to convert the style definitions in PHP files into separate CSS style sheets. Although manual operation can get the job done, when the amount of code in the PHP file is large, manual conversion will become very time-consuming and tedious.

So, are there any simple ways to easily convert the style definitions in PHP files into separate CSS style sheets? The basic idea In PHP files, style definitions are usually included in the ``:

preg_match_all("/<style type=\"text\/css\">(.*?)<\/style>/s", $phpcontent, $styles);

The extracted style definition is stored in `$ styles[1]`array. Now we can organize our style definitions into CSS style rules. The following code organizes the style definitions into CSS style rules according to tag names and class names, and stores the rules in the `$cssrules` array:

$cssrules = array();
foreach ($styles[1] as $style) {
    preg_match_all('/([\w\s.#{}:,%_-]*)\{([^\}]*)\}/', $style, $matches, PREG_SET_ORDER);
    foreach ($matches as $match) {
        $selectors = preg_split('/,\s*/', $match[1], -1, PREG_SPLIT_NO_EMPTY);
        $props = preg_split('/;\s*/', $match[2], -1, PREG_SPLIT_NO_EMPTY);
        foreach ($selectors as $selector) {
            $selector = trim($selector);
            if(!isset($cssrules[$selector])) {
                $cssrules[$selector] = array();
            }
            foreach ($props as $prop) {
                list($prop, $value) = explode(':', $prop);
                $cssrules[$selector][trim($prop)] = trim($value);
            }
        }
    }
}

Finally, we can write the organized style rules into a separate CSS style sheet file. The following code uses the `file_put_contents()` function to write style rules into a file named `style.css`:

$cssfile = 'style.css';
file_put_contents($cssfile, '');
foreach ($cssrules as $selector => $props) {
    $line = $selector . " {\n";
    foreach ($props as $prop => $value) {
        $line .= "\t" . $prop . ': ' . $value . ";\n";
    }
    $line .= "}\n";
    file_put_contents($cssfile, $line, FILE_APPEND);
}

In this way, we have completed converting the style definitions in the PHP file into CSS styles table work.

Summary

In website development, it is a very common requirement to convert the style definitions in PHP files into separate CSS style sheets. Although this work can be done manually, when the amount of code in the PHP file is large, manual conversion will become very time-consuming and cumbersome. This article introduces a method to quickly convert style definitions in PHP files into CSS style sheets, which can help developers improve development efficiency and reduce development errors.

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