如何将数组的每两个连续值转换为键/值对？

Question

I have an array like the following:

array('category_name:', 'c1', 'types:', 't1')

I want the alternate values of an array to be the values of an array:

array('category_name:' => 'c1', 'types:' => 't1')

Answer 1

function fold($a) {
    return $a 
        ? array(array_shift($a) => array_shift($a)) 
            + fold($a)
        : array();
}

print_r(fold(range('a','p' )));

~)

upd: a real-life version

function fold2($a) {
    $r = array();
    for($n = 1; $n < count($a); $n += 2)
        $r[$a[$n - 1]] = $a[$n];
    return $r;
}