- var_dump: documentation ( source)
- ksort: documentation ( source)
<?php
$str = array(1, 5, 2.5);
$arr = array();
foreach ($str as $s) {
$arr[$s][1]['a'] = $s;
}
echo '<pre>'; var_dump($arr); echo '</pre>';
ksort($arr);
echo '<pre>'; var_dump($arr); echo '</pre>';