php: alphabetically sort multi-dimensional array by its key?
I'm trying to do the exact same thing as the guy in the thread above me. But my ksort($array) seems to return a number 1. What am I doing wrong?
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You need to provide some sample code if you want people to help you :-). How did you use ksort? What does your array look like?MD Sayem Ahmed– MD Sayem Ahmed2011-09-02 07:34:41 +00:00Commented Sep 2, 2011 at 7:34
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Can you show us the array you're attempting to sort?diggersworld– diggersworld2011-09-02 07:35:37 +00:00Commented Sep 2, 2011 at 7:35
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php.net/manual/en/array.sorting.php is a good starting point; or post code.mjec– mjec2011-09-02 07:37:17 +00:00Commented Sep 2, 2011 at 7:37
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4 Answers
Have a look at the manual:
bool ksort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
You see, ksort returns a boolean value, and directly works on the given array (note the reference sign&). So what you're probably doing is assigning the return value of ksort, like:
$array = ksort($array);
instead of, just:
ksort($array);
Comments
The function does in-place sorting, the function return TRUE on success or FALSE on failure.
Refer to example from http://php.net/manual/en/function.ksort.php
<?php
$fruits = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");
ksort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
?>
The sorted result is in the variable $fruits, not from the function's return value.
If you try print_r($fruits), you will get the result like this
Array
(
[a] => orange
[b] => banana
[c] => apple
[d] => lemon
)
Comments
ksort() doesn't return an array, it manipulates the array you pass to it.
Comments
It doesn't literally return an 1, it returns true:
http://php.net/manual/en/function.ksort.php
Return Values
Returns TRUE on success or FALSE on failure.
