Php file_exist与正则表达式

Question

I am trying to use regex pattern to search for files.

Directory path is:

$css_dir = MY_PLUGIN_DIR.'/source/css/';

Css filename starts with:

$css_prefix = 'hap_css_';

and ends with:

'.css'

With some amount of unknown characters in between.

I dont know how to construct regex pattern with variable and how to construct file exist with regex.

Thank you!

Answer 1

You can use glob():

$files = glob($css_dir . $css_prefix . '*.css');

However, you have to roll your own DirectoryIterator based solution for more complex filtering:

$dir = new DirectoryIterator($css_dir);
$pattern = '/^' . preg_quote($css_prefix) . '.+\\.css$' . '/';
foreach ($dir as $fileInfo) {
  if (preg_match($pattern, $fileInfo->getBaseName())) {
    // match!
  }
}

(One could also integrate a RegexIterator):

The use of scandir() is possible as well:

$pattern = '/^' . preq_quote($css_prefix) . '.+\\.css$' . '/';

$files = array_filter(scandir($css_dir), function ($filename) {
  return preg_match($pattern, $filename);
});