multiple upload

table:
id int AUTO_INCREMENT
filename VARCHAR(255)
path VARCHAR(255)

form.html:

<form method="post" enctype="multipart/form-data">
	<input type="file" name="files[]" /> <!-- do not forget the [] in the name, it tells that it is an array -->
</form>

upload.php OPTION 1:

<?php
include 'yourmysqlorwhatever.php';
/*
	Here's how $_FILES['files'] looks like:
Array
(
    [name] => Array
        (
            [0] => foo.txt
            [1] => bar.txt
        )

    [type] => Array
        (
            [0] => text/plain
            [1] => text/plain
        )

    [tmp_name] => Array
        (
            [0] => /tmp/phpYzdqkD
            [1] => /tmp/phpeEwEWG
        )

    [error] => Array
        (
            [0] => 0
            [1] => 0
        )

    [size] => Array
        (
            [0] => 123
            [1] => 456
        )
)
*/

// Get how many files were sent
$j = sizeof($_FILES['files']['name']-1;

for($i = 0; $i <= $j; $i++) {
  $filename = $_FILES['files']['name'][$i];
  $ext = strtolower(end(explode(".", $_FILES['files']['name'][$i])));
  if(in_array($ext, $allowed_ext)) {
    $path = "somefolder/".uniqid().".".$ext;
    move_uploaded_files($_FILES['files']['tmp_name'][$i], $path);
    your_sql_query_function("INSERT INTO yourtable (`filename`, `path`) VALUES ('$filename', '$path');");
    echo "File $filename uploaded.<br/>";
  } else {
    echo "File $filename not allowed.<br/>";
  }
}


upload.php OPTION 2 (cleaner):
<?php
include 'yourmysqlorwhatever.php';

/*
Let's use this function to change how $_FILES['file'] is:
*/
function reArrayFiles(&$file_post) {

    $file_ary = array();
    $file_count = count($file_post['name']);
    $file_keys = array_keys($file_post);

    for ($i=0; $i<$file_count; $i++) {
        foreach ($file_keys as $key) {
            $file_ary[$i][$key] = $file_post[$key][$i];
        }
    }

    return $file_ary;
}

// now we do:
$files = reArrayFiles($_FILES['files']);

foreach($files as $file) {
  $filename = $file['name'];
  $ext = strtolower(end(explode(".", $filename)));
  if(in_array($ext, $allowed_ext)) {
    $path = "somefolder/".uniqid().".".$ext;
    move_uploaded_files($file['tmp_name'], $path);
    your_sql_query_function("INSERT INTO yourtable (`filename`, `path`) VALUES ('$filename', '$path');");
    echo "File $filename uploaded.<br/>";
  } else {
    echo "File $filename not allowed.<br/>";
  }
}