how to remove element from reference array in php? - php

Question

I am using before code to get every first id and remove that id but it show error undefine offset.
I don't understand What i missed in the below code ?
$products = Array
(
[32] => Array
(
[0] => 44
[1] => 45
[2] => 926
[3] => 927
[4] => 930
[5] => 931
)
[41] => Array
(
[0] => 928
[1] => 933
[2] => 969
[3] => 970
[4] => 971
[5] => 972
[6] => 973
[7] => 974
[8] => 975
[9] => 976
[10] => 977
[11] => 978
[12] => 979
[13] => 980
[14] => 981));
$in_array = array();
for($i=0;$i<12;)
{
foreach($products as &$brands):
if(isset($brands[0]))
{
$id = $brands[0];// get the first element
unset( $brands[0]); // have remove that element form products
// But here it show error undefine offset 0
array_push($in_array,$id);
/*if(($key1 = array_search($id, $brands)) !== false) {
unset($brands[$key1]);
}*/
//I tried this too same error
$i++;
}
endforeach;
}

Answer 1

$brands[0] doesn't seem to exist(I only see 32 and 41 in your code).
If you'd like to remove the first element in $products[32] than you need another foreach in your foreach:
foreach($products as $brands) {
foreach($brands as $brand) {
//Here is where you can reach $brand[0](Which is 44 in $products[32])
}
}
If you'd like to remove the first element of the array, you can use array_shift

Answer 2

By the help of mr #CaptainCarl i change my loop it working fine
for($i=0;$i<12;)
{
foreach($products_ids as $key=>$brands):
if(isset($brands[0]))
{
$id = $brands[0];
array_push($in_array,$id);
array_shift($brands);
$i++;
}
$products_ids[$key] = $brands;
endforeach;
}