正则表达式以_开头的文件夹

Question

hi I'm writing a script to loop through the current directory and list all sub directories all is working fine but i can't get it to exclude folders starting with an _

<?php

$dir = __dir__;

// Open a known directory, and proceed to read its contents
if (is_dir($dir)) {
    if ($dh = opendir($dir)) {
        echo("<ul>");
    while (($file = readdir($dh)) !== false) {
        if ($file == '.' || $file == '..' || $file == '^[_]*$' ) continue;
        if (is_dir($file)) {
            echo "<li> <a href='$file'>$file</a></li>";
        }
    }
    closedir($dh);
}
}
?>

Answer 1

you can use substr^[docs] like :

||  substr($file, 0, 1) === '_'