title: Pushing a value onto the end of an array
body: <p>I have the following array, it's full of gibberish (I got bored using lorem ipsum so I started typing random stuff -- I'm testing ¬_¬). </p>
  
  <p>I used mysqli_fetch_array to fetch this array.</p>
  
  <p>[array1]</p>
  
  <pre><code>Array
  (
      [0] =&gt; Array
          (
  
              [title] =&gt; this is a new thread, and it is great and it should work
  
              [thread_id] =&gt; 27
  
              [content] =&gt; &lt;p&gt;hello, how are you? and what are you doing y'all and this should work&lt;/p&gt; 
  
              [username] =&gt; umar
  
              [author_id] =&gt; 12
  
              [tags] =&gt; Array
                  (
                      [0] =&gt; lorem
                  )
  
          )
  
      [1] =&gt; Array
          (
  
              [title] =&gt; this is my second thread and it should work fine, just fine
  
              [thread_id] =&gt; 28
  
              [content] =&gt; &lt;p&gt;this is is good, that I think it should have a thread of its own, don't you think?&lt;/p&gt; 
  
              [username] =&gt; umarrazzaq
  
              [author_id] =&gt; 12
  
              [tags] =&gt; Array
                  (
                      [0] =&gt; thread
                      [1] =&gt; less
                  )
  
          )
  
  )
  </code></pre>
  
  <p>I have another array [array2]:</p>
  
  <pre><code>    Array ( [0] =&gt; Array (  [replies] =&gt; 2  [id] =&gt; 27 )
   [1] =&gt; Array (  [replies] =&gt; 1  [id] =&gt; 28 ) ) 
  </code></pre>
  
  <p>I want to push this second array onto the first array, where the IDs match.</p>
  
  <p>e.g. </p>
  
  <p>So the first array will become:</p>
  
  <pre><code> [0] =&gt; Array
              (
  
                  [title] =&gt; this is a new thread, and it is great and it should work
  
                  [thread_id] =&gt; 27
  
                  [content] =&gt; &lt;p&gt;hello, how are you? and what are you doing y'all and this should work&lt;/p&gt; 
  
                  [username] =&gt; umar
  
                  [author_id] =&gt; 12
  
                  [tags] =&gt; Array
                      (
                          [0] =&gt; lorem
                      )
  
                  **[replies] =&gt; 2**
  
              )
  </code></pre>
  
  <p>I've tried passing by reference and using array_push in a foreach loop, but it only does it for one.</p>