How to insert an array to array in php

How to insert an array to array in php

please help me in this thanks : i have an array like this
Array (
[full_name] => Hitesh Ranaut
[title] => Staff Author
[articles] => Array (
[0] => Array ( [title1] => title 1 value )
[1] => Array ( [title2] => title 2 value )
[2] => Array ( [title3] => title 3 value )
[3] => Array ( [title4] => title 4 value )
[4] => Array ( [title5] => title 5 value )
)
)
now what i want is to insert array such that
Array (
[full_name] => anil kumar
[title] => Staff Author
[articles] => Array (
[0] => Array ( [title1] => title 1 value )
[1] => Array ( [title2] => title 2 value )
[2] => Array ( [title3] => title 3 value )
[3] => Array ( [title4] => title 4 value )
[4] => Array ( [title5] => title 5 value )
[5] => Array ( [title6] => title 6 value )
)
)
actully i am taking this data from user . and this data is comming by
json_decode function but i need to push data into articles