(PHP 4, PHP 5, PHP 7)
Sort an array by key
bool ksort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
Sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays.
Parameters:
array
The input array.
sort_flags
You may modify the behavior of the sort using the optional parameter sort_flags
, for details see sort().
Returns:
Returns TRUE
on success or FALSE
on failure.
Examples:
ksort() example
<?php $fruits = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple"); ksort($fruits); foreach ($fruits as $key => $val) { echo "$key = $val\n"; } ?>
The above example will output:
a = orange b = banana c = apple d = lemon
See also:
asort() -
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