Mac OSX alternative script for `alias dud='du -ahd 1 | sort -hr | head -n 11'` on Debian. -- https://frankl.in/code/755-top-10-files-directories-by-size

dud.php

#!/usr/bin/php
<?php
$results = 11;	// add 1 for dir total

$cwd = getcwd();
$dir = scandir( $cwd );

foreach( $dir as $item ) {
	if( $item === '..' ) { continue; }
	$path = $cwd .'/'. $item;
	if( is_dir( $path ) ) {
		$items[ $item ] = dirsize( $path );
	} elseif( is_file( $path ) ) {
		$items[ $item ] = filesize( $path );
	}
}

arsort( $items );

$r = $results;
foreach( $items as $name => $size ) {
	if( $r == 0 ) { continue; }
	$human = bytes2human( $size );
	echo "$human\t$name\n";
	$r--;
}

function dirsize( $d ) {
	return human2bytes( trim( shell_exec( 'du -hs '. escapeshellarg($d) ) ) );
}

function bytes2human( $size ) {
	$units = array('', 'K', 'M', 'G', 'T');
	$unit = 0;
	while( $size >= 1024 && $unit < 5 ) {
		$size = $size / 1024;
		$unit++;
	}
	return round( $size, 1 ) . $units[ $unit ];
}

function human2bytes( $size ) {
	$units = array(
		'K' => 1024,
		'M' => 1048576,
		'G' => 1073741824,
		'T' => 1099511627776
	);
	preg_match( '/^([\d\.]+)([A-Z])\b/', $size, $s );
	$unit = $units[ $s[2] ] ?: 1;
	$size = $s[1];
	$size = round( $size * $unit );
	return $size;
}