PHP Directories

Question

Can someone please xplain this code. Im reading larry ullmans book on php and i dont get this part. Thanks in advance!!

$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

它显示了当前目录中所有目录的列表

Answer 2

I'll repost your code with comments to exaplain what each line does.

$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>';

In short, it prints out an output of the directories inside the directory the script is running in.