Sorting an associative array in PHP

by THavamani 2013-03-30 10:44:56

Example Input:
Array ( [a1] => 14959.14 [a2] => 10747.94 [a3] => 19531.23 [a4] => 8915.83 [a5] => 2646.25 [a6] => 28379.74 [a7] => 727.25 )

Syntax:
array_multisort(array1,sorting order,sorting type,array2,array3...)
here,
array1 =Specifies an array(Required)
sorting order = Specifies the sorting order(Optional).

Possible values:

SORT_ASC Default. Sort in ascending order (A-Z)
SORT_DESC sort in descending order (Z-A)

sorting type = Specifies the type to use(Optional),
when comparing elements.

Possible values:

SORT_REGULAR Default. Compare elements normally
SORT_NUMERIC Compare elements as numeric values
SORT_STRING Compare elements as string values

array2,array3 are (optional).

Output Example.

array_multisort($realarea,SORT_DESC);

Descending order Output.
Array ( [a6] => 28379.74 [a3] => 19531.23 [a1] => 14959.14 [a2] => 10747.94 [a4] => 8915.83 [a5] => 2646.25 [a7] => 727.25 )

array_multisort($realarea,SORT_DESC);

Ascending order Output.
Array ( [a7] => 727.25 [a5] => 2646.25 [a4] => 8915.83 [a2] => 10747.94 [a1] => 14959.14 [a3] => 19531.23 [a6] => 28379.74 )

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