Can't able to delete the empty array element in Php

Question

//Below is my array . Notice the 1st element of the name3 array is empty and i want to remove it

$arr = array(
'name' => 'Alvin',
'name2' => 'Joseph',
'name3' =>array('','abc','xyz')
)

// I am using foreach loop and using unset() method , to unset that particular empty element.

foreach($arr as $key =>$value)
{
if(is_array($value))
{

foreach($value as $key1 => $val1)
{
if(empty($val1))
{
unset($value[$key1]);
}
}
}
}
echo "<pre>";
print_r($arr);

The output is (The empty element with index 0 is still there:-
Array
(
[name] => Alvin
[name2] => Joseph
[name3] => Array
(
[0] =>
[1] => abc
[2] => xyz
)

)

Answer 1

It does not work because $value from the outer foreach contains copies of the values of $arr and the inner foreach modifies these copies without any effect to the original
so you can fix that by telling PHP to make &$value references to the original values stored in $arr:

https://code.sololearn.com/wrsjBGLu4c0X/#php