Sum of id element from n number of array inside array in PHP

Question

I have an array like tree and i want to get sum of id element any idea how to get??

Thanks

<?php
 $data=[
 0=>[
 'id'=>1,
 'date'=>'3/3/2017',
 'owner'=>'ownerName1',
 'extension'=>'yourExtension1',
 'filename'=>'YourFileName1',
 'childs'=>
 [
 0=>[
 'id'=>3,
 'date'=>'3/3/2017',
 'owner'=>'ownerName3',
 'extension'=>'yourExtension3',
 'filename'=>'YourFileName3',
 'childs'=>
 [
 0=>[
 'id'=>5,
 'date'=>'3/3/2017',
 'owner'=>'ownerName5',
 'extension'=>'yourExtension5',
 'filename'=>'YourFileName5',
 'childs'=>
 [
 0=>[
 'id'=>11,
 'date'=>'3/3/2017',
 'owner'=>'ownerName5',
 'extension'=>'yourExtension5',
 'filename'=>'YourFileName5',
 'childs'=>
 [
 0=>[
 'id'=>13,
 'date'=>'3/3/2017',
 'owner'=>'ownerName5',
 'extension'=>'yourExtension5',
 'filename'=>'YourFileName5'
 ],
 1=>[
 'id'=>14,
 'date'=>'3/3/2017',
 'owner'=>'ownerName6',
 'extension'=>'yourExtension6',
 'filename'=>'YourFileName6'
 ]
 ]
 ],
 1=>[
 'id'=>12,
 'date'=>'3/3/2017',
 'owner'=>'ownerName6',
 'extension'=>'yourExtension6',
 'filename'=>'YourFileName6'
 ]
 ]
 ],
 1=>[
 'id'=>6,
 'date'=>'3/3/2017',
 'owner'=>'ownerName6',
 'extension'=>'yourExtension6',
 'filename'=>'YourFileName6'
 ]
 ]
 ],
 1=>[
 'id'=>4,
 'date'=>'3/3/2017',
 'owner'=>'ownerName4',
 'extension'=>'yourExtension4',
 'filename'=>'YourFileName4'
 ]
 ]
 ],
 1=>[
 'id'=>2,
 'date'=>'3/3/2017',
 'owner'=>'ownerName2',
 'extension'=>'yourExtension2',
 'filename'=>'YourFileName2',
 'childs'=>
 [
 0=>[
 'id'=>9,
 'date'=>'3/3/2017',
 'owner'=>'ownerName7',
 'extension'=>'yourExtension9',
 'filename'=>'YourFileName7'
 ],
 1=>[
 'id'=>10,
 'date'=>'3/3/2017',
 'owner'=>'ownerName8',
 'extension'=>'yourExtension10',
 'filename'=>'YourFileName8'
 ]
 ]
 ],
 2=>[
 'id'=>2,
 'date'=>'3/3/2017',
 'owner'=>'ownerName2',
 'extension'=>'yourExtension2',
 'filename'=>'YourFileName2',
 'childs'=>
 [
 0=>[
 'id'=>7,
 'date'=>'3/3/2017',
 'owner'=>'ownerName7',
 'extension'=>'yourExtension7',
 'filename'=>'YourFileName7'
 ],
 1=>[
 'id'=>8,
 'date'=>'3/3/2017',
 'owner'=>'ownerName8',
 'extension'=>'yourExtension8',
 'filename'=>'YourFileName8'
 ]
 ]
 ]
 ];
 ?>

Answer 1

try this code to get sum of all id element.

<?php
$data =[
 0=>[
 'id'=>1,
 'date'=>'3/3/2017',
 'owner'=>'ownerName1',
 'extension'=>'yourExtension1',
 'filename'=>'YourFileName1',
 'childs'=>
 [
 0=>[
 'id'=>3,
 'date'=>'3/3/2017',
 'owner'=>'ownerName3',
 'extension'=>'yourExtension3',
 'filename'=>'YourFileName3',
 'childs'=>
 [
 0=>[
 'id'=>5,
 'date'=>'3/3/2017',
 'owner'=>'ownerName5',
 'extension'=>'yourExtension5',
 'filename'=>'YourFileName5',
 'childs'=>
 [
 0=>[
 'id'=>11,
 'date'=>'3/3/2017',
 'owner'=>'ownerName5',
 'extension'=>'yourExtension5',
 'filename'=>'YourFileName5',
 'childs'=>
 [
 0=>[
 'id'=>13,
 'date'=>'3/3/2017',
 'owner'=>'ownerName5',
 'extension'=>'yourExtension5',
 'filename'=>'YourFileName5'
 ],
 1=>[
 'id'=>14,
 'date'=>'3/3/2017',
 'owner'=>'ownerName6',
 'extension'=>'yourExtension6',
 'filename'=>'YourFileName6'
 ]
 ]
 ],
 1=>[
 'id'=>12,
 'date'=>'3/3/2017',
 'owner'=>'ownerName6',
 'extension'=>'yourExtension6',
 'filename'=>'YourFileName6'
 ]
 ]
 ],
 1=>[
 'id'=>6,
 'date'=>'3/3/2017',
 'owner'=>'ownerName6',
 'extension'=>'yourExtension6',
 'filename'=>'YourFileName6'
 ]
 ]
 ],
 1=>[
 'id'=>4,
 'date'=>'3/3/2017',
 'owner'=>'ownerName4',
 'extension'=>'yourExtension4',
 'filename'=>'YourFileName4'
 ]
 ]
 ],
 1=>[
 'id'=>2,
 'date'=>'3/3/2017',
 'owner'=>'ownerName2',
 'extension'=>'yourExtension2',
 'filename'=>'YourFileName2',
 'childs'=>
 [
 0=>[
 'id'=>9,
 'date'=>'3/3/2017',
 'owner'=>'ownerName7',
 'extension'=>'yourExtension9',
 'filename'=>'YourFileName7'
 ],
 1=>[
 'id'=>10,
 'date'=>'3/3/2017',
 'owner'=>'ownerName8',
 'extension'=>'yourExtension10',
 'filename'=>'YourFileName8'
 ]
 ]
 ],
 2=>[
 'id'=>2,
 'date'=>'3/3/2017',
 'owner'=>'ownerName2',
 'extension'=>'yourExtension2',
 'filename'=>'YourFileName2',
 'childs'=>
 [
 0=>[
 'id'=>7,
 'date'=>'3/3/2017',
 'owner'=>'ownerName7',
 'extension'=>'yourExtension7',
 'filename'=>'YourFileName7'
 ],
 1=>[
 'id'=>8,
 'date'=>'3/3/2017',
 'owner'=>'ownerName8',
 'extension'=>'yourExtension8',
 'filename'=>'YourFileName8'
 ]
 ]
 ]
 ];
echo "<pre>";
//print_r(json_encode($data));
echo "<br/>";
$json_data = json_encode($data);
//preg_match_all('!\d+!', $str, $matches);
preg_match_all('("id":\d+)', $json_data, $matches);
//print_r($matches);
$temp = [];
$temp = $matches[0];
$sum = 0 ;
foreach ($temp as $key => $value) {
 preg_match_all('!\d+!', $value, $matches);
 if (isset($matches[0][0])) {
 $sum = $sum + $matches[0][0];
 }
}
echo "total of all id = ".$sum;
?>