- print_r: documentation ( source)
- sort: documentation ( source)
- ksort: documentation ( source)
<?php
$a = array(0 => 'a', 'str' => 'b');
$b = array('str' => 'b', 0 => 'a');
ksort($a);
ksort($b);
$c = array(0, 'str');
$d = array('str', 0);
sort($c);
sort($d);
print_r($a);
echo "\n";
print_r($b);
echo "\n";
print_r($c);
echo "\n";
print_r($d);