Sometimes programmer needs to chunk or grouping array based on the array key value. Look at the below code snippet, here I have a multidimensional array, and I want to group all same elements of each category.
OUTPUT:
array (
'php' =>
array (
0 =>
array (
'category' => 'php',
'post_id' => 100,
),
1 =>
array (
'category' => 'php',
'post_id' => 102,
),
2 =>
array (
'category' => 'php',
'post_id' => 104,
),
),
'html' =>
array (
0 =>
array (
'category' => 'html',
'post_id' => 101,
),
1 =>
array (
'category' => 'html',
'post_id' => 104,
),
),
'js' =>
array (
0 =>
array (
'category' => 'js',
'post_id' => 103,
),
),
)
