$output = array_merge($array1, $array2);
// two arrays one become keys and second becomes values array_combine ( array $keys , array $values );
Input : $a1=array("a"=>"raj", "b"=>"striver"); $a2=array("z"=>"geeks", "b"=>"articles"); Output : Array ( [a] => raj [b] => Array ( [0] => striver [1] => articles ) [z] => geeks )
$all_arrays = array_merge($array1, $array2, $array3, ...);