PHP Associative Arrays

<?php

$arr = [
    "title: Lorem ipsum title",
    "body: Lorem ipsum dolor, sit amet consectetur adipisicing elit.",
];

$items = [];

for($i=0; $i < count($arr); $i++) { 
    $items[$i] = explode(':' , $arr[$i]);

    $associativeArrays[$items[$i][0]] = $items[$i][1];
}

var_dump($associativeArrays);