<?php
$myarray=array(
0 => array
(
'dateTime' => '2013-12-02T10:00:00-08:00',
'chanl1' => '20.10',
'chanl2' => '45.4',
'chanl3' => '',
),
1 => array
(
'dateTime' => '2013-12-02T11:00:00-08:00',
'chanl1' => '20.11',
'chanl2' => '45.4',
'chanl3' => '',
),
2 => array
(
'dateTime' => '2013-12-02T12:00:00-08:00',
'chanl1' => '20.12',
'chanl2' => '33.8',
'chanl3' => '',
),
3 => array
(
'dateTime' => '2013-12-02T09:00:00-08:00',
'chanl1' => '20.9',
'chanl2' => '33.9',
'chanl3' => ''
));
foreach($myarray as $c=>$key) {
$dateTime[] = $key['dateTime'];
}
array_multisort($dateTime,SORT_ASC,SORT_STRING,$myarray);
echo "<pre>";
print_r($myarray);
?>