How can I separate numeric array's keys from the letter keys? - php

Question

Here is my code:
$arr = array();
$arr[] = 1;
$arr['txt'] = 'something';
$arr['txt2'] = 'something2';
$arr[] = 2;
$arr[] = 3;
echo '<pre>';
print_r($arr);
/* output:
1
something
something2
2
3
*/
I'm trying to change array's order and make this result:
/* expected output:
1
2
3
something
something2
*/
As you see, I need to reindex all array's items and put the numeric ones in the beginning of array. Is that possible?

Answer 1

How can I separate numeric array's keys from the letter keys?
Simplest way is to sort the array by key, using ksort which modifies the array in place. Use the SORT_STRING flag to get the result you seek:
ksort($myArr, SORT_STRING);
Live demo

Answer 2

The Correct syntax is:
- Using array values
<?php
$arr = array();
$arr[] = 1;
$arr['txt'] = 'something';
$arr['txt2'] = 'something2';
$arr[] = 2;
$arr[] = 3;
echo '<pre>';
usort($arr, function($a, $b) {
if (is_float($a)) {
if ( is_float($b)) {
return $a - $b;
}
else
return -1;
}
elseif (is_float($b)) {
return 1;
}
else {
return strcmp($a, $b);
}
});
print_r($arr);
?>
OUTPUT
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => something
[4] => something2
)
- Using array index values
<?php
$arr = array();
$arr[] = 1;
$arr['txt'] = 'something';
$arr['txt2'] = 'something2';
$arr[] = 2;
$arr[] = 3;
echo '<pre>';
usort($arr, SORT_STRING);
print_r($arr);
?>
OUTPUT
Array
(
[0] => 1
[1] => 2
[2] => 3
[txt] => something
[txt2] => something2
)
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