title: difference between two arrays
body: <p>I have following two arrays.  I want the difference between these two arrays. That is, how can I find the values that do not exist in both arrays?</p>
  
  <pre><code> $array1=Array ( [0] =&gt; 64 [1] =&gt; 98 [2] =&gt; 112 [3] =&gt; 92 [4] =&gt; 92 [5] =&gt; 92 ) ;
   $array2=Array ( [0] =&gt; 3 [1] =&gt; 26 [2] =&gt; 38 [3] =&gt; 40 [4] =&gt; 44 [5] =&gt; 46 [6] =&gt; 48 [7] =&gt; 52 [8] =&gt; 64 [9] =&gt; 68 [10] =&gt; 70 [11] =&gt; 72 [12] =&gt; 102 [13] =&gt; 104 [14] =&gt; 106 [15] =&gt; 92 [16] =&gt; 94 [17] =&gt; 96 [18] =&gt; 98 [19] =&gt; 100 [20] =&gt; 108 [21] =&gt; 110 [22] =&gt; 112);
  </code></pre>