How to add an array to the end of another array php code example

Example 1: php merge 2 arrays

<?php
  $array1 = [
      "color" => "green"
  ];
  $array2 = [
      "color" => "red", 
      "color" => "blue"
  ];
  $result = array_merge($array1, $array2);
?>

// $result
[
    "color" => "green"
    "color" => "red", 
    "color" => "blue"
]

Example 2: how to append one array to another array in php

((data.userDetails.profile_picture === null) ||(data.userDetails.profile_picture===undefined))? picture ='<div><img src="http://commondatastorage.googleapis.com/codeskulptor-assets/lathrop/nebula_brown.png"' :
          picture = '<img src="'+data.userDetails.profile_picture+ '"/>';