Splitting one Array into many Array in PHP - php

Question

I'm in need of splitting of the single array into multiple array for some report generating purpose.
I have an array like this which I have given below.
Array
(
[blah_1] => 1
[blahblah_1] => 31
[blahblahblah_1] => 25
[blah_3] => 1
[blahblah_3] => 3
[blahblahblah_3] => 5
[blah_10] => 1
[blahblah_10] => 10
[blahblahblah_10] => 2
)
I want to split the above to,
Array
(
[blah_1] => 1
[blahblah_1] => 31
[blahblahblah_1] => 25
)
Array
(
[blah_3] => 1
[blahblah_3] => 3
[blahblahblah_3] => 5
)
Array
(
[blah_10] => 1
[blahblah_10] => 10
[blahblahblah_10] => 2
)
How can I do this in PHP ??

Answer 1

$oldarray=array('blah_1'=>1,'blahblah_1'=>31,'blahblahblah_1'=>25,
'blah_3'=>1,'blahblah_3'=>3,'blahblahblah_3'=>5,
'blah_10'=>1,'blahblah_10'=>10,'blahblahblah_10'=>2
)
$newarray=array();
foreach ($oldarray as $key=>$val) { //Loops through each element in your original array
$parts=array_reverse(explode('_',$key)); //Splits the key around _ and reverses
$newarray[$parts[0]][$key]=$val; //Gets the first part (the number) and adds the
//value to a new array based on this number.
}
The output will be:
Array (
[1]=>Array
(
[blah_1] => 1
[blahblah_1] => 31
[blahblahblah_1] => 25
)
[3]=>Array
(
[blah_3] => 1
[blahblah_3] => 3
[blahblahblah_3] => 5
)
[10]=>Array
(
[blah_10] => 1
[blahblah_10] => 10
[blahblahblah_10] => 2
)
)

Answer 2

Use array_chunk. Example:
<?php
$chunks = array_chunk($yourarray, 3);
print_r($chunks);
?>

Answer 3

Use array_chunk
i.e
$a = array(1,2,3,4,5,6,7);
var_dump(array_chunk($a, 3));

Answer 4

Not sure if you are looking for array_slice
but take a look at this example:
<?php
$input = array("a", "b", "c", "d", "e");
print_r(array_slice($input, 2, -1));
print_r(array_slice($input, 2, -1, true));
?>
will result in this:
Array
(
[0] => c
[1] => d
)
Array
(
[2] => c
[3] => d
)

Answer 5

array_chunk ( array $input , int $size);