PHP multidimensional array sorting example

$array = array(
'0' => array('3', 'one'),
'1' => array('101' , 'two'),
'2' => array('12', 'three'),
'3' => array('13', 'four'),
'4' => array ('1', 'five'),
'5' => array('3', 'six'),
);
/*Method 1: Using uasort () function instead of usort() function. The difference is that uasort() will maintain the original index and usort() will rebuild the index. */
function cmp($a, $b){
 if($a[0] == $b[0]){
 return 0;
 }
 return($a[0] < $b[0 ]) ? -1 : 1;
}
uasort($array,"cmp");
print_r($array);
echo "**********************";
 /*Method 2: Use array_multisort*/

foreach ($array as $key=>$value){
 $first[$key] = $value[0];
 $second[$key] = $value[1];
}

array_multisort($first,SORT_NUMERIC,SORT_ASC,$second,SORT_STRING,SORT_ASC,$array);
print_r($array);
/*
Sort order flag:
SORT_ASC – as per Sort in ascending order
SORT_DESC - Sort in descending order
 Sort type flags:
SORT_REGULAR - Compare items in the usual way
SORT_NUMERIC - Compare items in numerical order
SORT_STRING - Compare items in strings
*/

>>> For more information, please view the complete list of php array sorting methods