The array_combine() function used for creates an new array by using one array for keys and another for values(Both arrays must have equal number of elements).
Example
$name=array("Ram","Shyam","Ghanshyam");
$age=array("30","32","34");
print_r(array_combine($name,$age));
Output
Array ( [Ram] => 30 [Shyam] => 32 [Ghanshyam] => 34 )
The array_merge() function used for merges one or more arrays.
Example
$array1=array("a"=>"ram","b"=>"shyam");
$array2=array("c"=>"ghanshyam","b"=>"ravi");
print_r(array_merge($array1,$array2));
Output
Array ( [a] => ram [b] => ravi [c] => ghanshyam )
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