Mayhaps something like this will work for you. I will notate so it's not just a copy-and-paste answer. Maybe someone will get some insight on it to improve it in the future:
function slitArray($a1,$num = 25)
{
# Used to store the difference when the value exceeds the max
$store = 0;
# Storage container that will be built using sums/diffs
$new = array();
# Loop through the main array
foreach($a1 as $value) {
# If the last key/value pair in our return array is an array
if(is_array(end($new)))
# Add up the values in that array
$sum = array_sum(current($new));
else
# If not array, no values have been stored yet
$sum = 0;
# This just gets the last key
$count = (count($new)-1);
# Assign last key
$i = ($count <= 0)? 0 : $count;
# If the sum of the current storage array plus the value
# of the current array is greater than our max value
if(($sum + $value) > $num) {
# Take max and remove the current total of storage array
$use = ($num-$sum);
# Take what's left and remove it from the current value
$store = ($value-$use);
# If the current stored value (the value we want to push to
# the next storage k/v pair) is more than the max allowed
if($store > $num) {
# Takes a value, checks if it's greater than max,
# and if it is, breaks the value up by max as a divider
$divide = function($store,$num)
{
if($store > $num) {
$count = ceil($store/$num);
for($i=0; $i<$count; $i++) {
$new[] = ($store > $num)? $num : $store;
$store -= $num;
}
return $new;
}
else
return array($store);
};
# This should either be an array with 1 or more values
$forward = $divide($store,$num);
# Do a look forward and add this excess array into our
# current storage array
$a = $i;
foreach($forward as $aVal) {
$new[$a+=1][] = $aVal;
}
}
# If the store value is less than our max value, just add
# it to the next key in this storage array
else {
$new[$i+1][] = $store;
# Reset the storage back to 0, just incase
$store = 0;
}
}
# Set the current "use" value as the current value in our
# from-array. Since it doesn't exceed the max, it just gets
# added to the storage array
else
$use = $value;
# Sometimes the math makes $use 0, keep that out of the
# storage array. The $use value is the current value to add at
# the time of iteration. Previous storage values are added as
# future-keys
if($use > 0)
$new[$i][] = $use;
}
# Return the final assembled array
return $new;
}
# To use, add array into function
$a1 = array(10,10,10,10,10,10,10,10,10,10);
# to split using different max value, just add it to second arg
# example: slitArray($a1,20);
print_r(slitArray($a1));
Gives you:
Array
(
[0] => Array
(
[0] => 10
[1] => 10
[2] => 5
)
[1] => Array
(
[0] => 5
[1] => 10
[2] => 10
)
[2] => Array
(
[0] => 10
[1] => 10
[2] => 5
)
[3] => Array
(
[0] => 5
[1] => 10
[2] => 10
)
)
An array input of:
$a1 = array(23,2,71,23,50,2,3,4,1,2,50,75);
Gives you:
Array
(
[0] => Array
(
[0] => 23
[1] => 2
)
[1] => Array
(
[0] => 25
)
[2] => Array
(
[0] => 25
)
[3] => Array
(
[0] => 21
[1] => 4
)
[4] => Array
(
[0] => 19
[1] => 6
)
[5] => Array
(
[0] => 25
)
[6] => Array
(
[0] => 19
[1] => 2
[2] => 3
[3] => 1
)
[7] => Array
(
[0] => 3
[1] => 1
[2] => 2
[3] => 19
)
[8] => Array
(
[0] => 25
)
[9] => Array
(
[0] => 6
[1] => 19
)
[10] => Array
(
[0] => 25
)
[11] => Array
(
[0] => 25
)
[12] => Array
(
[0] => 6
)
)
