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I have an array like this:
$a = array('aa', 'bb', 'cc', 'dd');
I want to add the 'rq' string at the beginning of all the elements of the array. Is it possible to do it by calling array_map() on this array?
720
The array_map() is an inbuilt function in PHP and it helps to modify all elements one or more arrays according to some user-defined condition in an easy manner. It basically, sends each of the elements of an array to a user-defined function and returns an array with new values as modified by that function.
The resulting array of array_map has the same length as that of the largest input array; array_walk does not return an array but at the same time it cannot alter the number of elements of original array; array_filter picks only a subset of the elements of the array according to a filtering function.
The returned array will preserve the keys of the array argument if and only if exactly one array is passed. If more than one array is passed, the returned array will have sequential integer keys.
Definition and Usage. The array_map() function sends each value of an array to a user-made function, and returns an array with new values, given by the user-made function.
$a = array_map(function ($str) { return "rq$str"; }, $a);
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