ksort and srsort functions
integer ksort(array subject [, integer sort_flag]) integer krsort(array subject [, integer sort_flag])
These functions returns TRUE on success or FALSE on failure. These functions useful mainly for associative arrays and accept two parameters:
array as input
sort_flags (optional) modify the behavior of the sort. Sorting type flags:
SORT_REGULAR: compare items normally (don't change types)
SORT_NUMERIC: compare items numerically
SORT_STRING: compare items as strings
SORT_LOCALE_STRING: compare items as strings, based on the current locale.
SORT_NATURAL: compare items as strings using "natural ordering" like natsort()
SORT_FLAG_CASE: can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort strings case-insensitively
ksort( ) sorts the elements in the subject array from lowest key to highest key, and
krsort( ) sorts in the reverse order. The following example demonstrates the
ksort( ) function.
ksort and krsort examples
$map = array("o"=>"kk", "e"=>"zz", "z"=>"hh", "a"=>"rr"); ksort($map); print_r($map);
The sorted array
$map is now:
Array ( [a] => rr [e] => zz [o] => kk [z] => hh )
There is little point in using
ksort( ) on an integer-indexed array because the keys are already in order. When
krsort( ) is used on an indexed array, it reverses the order of the elements.
Array ( [z] => hh [o] => kk [e] => zz [a] => rr )