How should merge 2 element of array in PHP?

Question

I want to merge 2 element in array in PHP how can i do that. Please any on tell me.

$arr = array('Hello','World!','Beautiful','Day!');  // these is my input

//i want output like 

array('Hello World!','Beautiful Day!');

Answer 1

The generic solution would be something like this:

$result = array_map(function($pair) {
    return join(' ', $pair);
}, array_chunk($arr, 2));

It joins together words in pairs, so 1st and 2nd, 3rd and 4th, etc.

Answer 2

Specific to that case, it'd be very simple:

$result = array($arr[0].' '.$arr[1], $arr[2].' '.$arr[3]);

A more general approach would be

$result = array();
for ($i = 0; $i < count($arr); $i += 2) {
    if (isset($arr[$i+1])) {
        $result[] = $arr[$i] . ' ' . $arr[$i+1];
    }
    else {
        $result[] = $arr[$i];
    }
}