Add value in specific index array - php

Question

i have array data like this.
[0] => Array (
[id] => 1
[id_requestor] => 1
[jam_input] => 2015-06-20 06:00:00
[jam_pakai] => 2015-06-28 08:00:00
[total_poin] => 30
)
[1] => Array (
[id] => 2
[id_requestor] => 2
[jam_input] => 2015-06-20 07:00:00
[jam_pakai] => 2015-06-28 08:00:00
[total_poin] => 10
)
[2] => Array (
[id] => 3
[id_requestor] => 3
[jam_input] => 2015-06-20 06:30:00
[jam_pakai] => 2015-06-28 08:00:00
[total_poin] => 5
)
In above data, there is total_poin. This total_poin that i use later.
I want to sort total_poin array descending.
But i wont to use php built in array function.
Cause i have to use method from research paper like this.
for i=0 to i<main queue.size
if jobi+1 length > jobi length then
add jobi+1 in front of job i in the queue
end if
if main queue.size = 0 then
add job i last in the main queue
end if
And here is my implementation :
function LJFAlgorithm($time_str) {
$batchData = getBatch($time_str);
$ljf = [];
for ($i=0; $i < count($batchData)-1; $i++) {
echo $batchData[$i+1]['total_poin'] ." >= ". $batchData[$i]['total_poin'] . " = " . ($batchData[$i+1]['total_poin'] >= $batchData[$i]['total_poin']);
if ($batchData[$i+1]['total_poin'] >= $batchData[$i]['total_poin']) {
echo ", Add " . $batchData[$i+1]['total_poin'] . " in front of " . $batchData[$i]['total_poin'];
} else {
echo ", Add " . $batchData[$i]['total_poin'] . " in front of " . $batchData[$i+1]['total_poin'];
}
echo '<br/>';
}
print_r($ljf);
}
But it not work perfectly, i get one data missing.
Here is my output code :
10 >= 30 = , Add 30 in front of 10
5 >= 10 = , Add 10 in front of 5
5 value not added in array.
How to fix that?
Thank you very much.

Answer 1

Try this
for ($i=0; $i <= count($batchData)-1; $i++)