title: How to swap array elements in php?
body: <p>I have an array</p>
  
  <pre><code>           Array
                  (
                      [0] =&gt; Array
                          (                                
                              [order_id] =&gt; 1318
                              [code] =&gt; shipping
                              [title] =&gt; UK Shipping  (Weight: 0.00kg)
                              [value] =&gt; 10.2000                                
                          )
  
                      [1] =&gt; Array
                          (
  
                              [order_id] =&gt; 1318
                              [code] =&gt; sub_total
                              [title] =&gt; Sub-Total
                              [value] =&gt; 4.7000                                
                          )
  
                      [2] =&gt; Array
                          (                                
                              [order_id] =&gt; 1318
                              [code] =&gt; coupon
                              [title] =&gt; Coupon (10P)
                              [value] =&gt; -0.4700                                
                          )
  
                      [3] =&gt; Array
                          (                                
                              [order_id] =&gt; 1318
                              [code] =&gt; tax
                              [title] =&gt; VAT (20%)
                              [value] =&gt; 2.8860
                              [sort_order] =&gt; 8
                          )
  
                      [4] =&gt; Array
                          (                                
                              [order_id] =&gt; 1318
                              [code] =&gt; total
                              [title] =&gt; Total
                              [value] =&gt; 17.3160                                
                          )
                      )
  </code></pre>
  
  <p>I want to swap the array index.
  I want to swap the array index when [code] => coupon to [code] => sub_total, If coupon is available.
  I want the position of coupon to above the subtotal.
  I want the position of sub_total to above the vat.
  How is it possible?
  Please help me.</p>