Answers for "php drop keys"

php delete array element

//Delete array items with unset(no re-index) or array_splice(re-index)
$colors = array("red","blue","green");                             
unset($colors[1]);//remove second element, do not re-index array

$colors = array("red","blue","green");
array_splice($colors, 1, 1); //remove second element, re-index array

php array_pop with key

print_r(array_slice(array("a" => "1", "b" => 2, "c" => 3), -1, 1));