PHP目录

Question

有人可以解释一下这段代码。在阅读拉里ullman的关于PHP的书，我不知道这部分。在此先感谢!!

$search_dir = '.';
$contents = scandir($search_dir);

    print '<h2>Directories</h2>
    <ul>';
    foreach ($contents as $item) {
    if ( (is_dir($search_dir . '/' . $item)) AND (substr($item, 0, 1) != '.') ) {
    print "<li>$item</li>\n";
    }
    }
print '</ul>';

Answer 1

它显示当前目录中所有目录的列表

Answer 2

我将使用注释重新发布您的代码，以解释每行的内容。

$search_dir = '.'; //Set the directory to search. "." means the current one.
$contents = scandir($search_dir); //scan the directory and return its results into $contents

print '<h2>Directories</h2>
    <ul>';
foreach($contents as $item) { //Iterate through the array and for each item...
    //If the item is a directory        AND it doesn't start with a . (which means the current one)...
    if ((is_dir($search_dir.'/'.$item)) AND(substr($item, 0, 1) != '.')) {
        print "<li>$item</li>\n"; //Print it
    }
}
print '</ul>';

简而言之，它打印出运行脚本的目录中的目录输出。