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  1. PO
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    <pre><code>&lt;? $my_array = array(0 =&gt; 1, 1 =&gt; 2, 2 =&gt; 3, 3 =&gt; 4, 4 =&gt; 5); $your_array = array(0 =&gt; 1, 1 =&gt; 2); $the_array = array_unique(array_merge($my_array, $your_array)); $_SESSION['test'] = $the_array; print_r($the_array); echo(count($_SESSION['test'])); ?&gt; </code></pre> <p>yields:</p> <p>Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) 5</p> <pre><code>&lt;? $my_array = array(0 =&gt; 1, 1 =&gt; 1, 2 =&gt; 1, 3 =&gt; 1, 4 =&gt; 1); $your_array = array(0 =&gt; 1, 1 =&gt; 1); $the_array = array_unique(array_merge($my_array, $your_array)); $_SESSION['test'] = $the_array; print_r($the_array); echo(count($_SESSION['test'])); ?&gt; </code></pre> <p>yields:</p> <p>Array ( [0] => 1 ) 1</p> <p>my guess would be your stdClass Object([id] => xxxxx) are all the same...</p> <p>EDIT</p> <p>another test:</p> <pre><code>&lt;? $my_array = array(0 =&gt; array('id' =&gt; 11), 1 =&gt; array('id' =&gt; 22), 2 =&gt; array('id' =&gt; 22), 3 =&gt; array('id' =&gt; 33), 4 =&gt; array('id' =&gt; 445)); $your_array = array(0 =&gt; array('id' =&gt; 11), 1 =&gt; array('id' =&gt; 7908)); $the_array = array_unique(array_merge($my_array, $your_array), SORT_REGULAR); $_SESSION['test'] = $the_array; print_r($the_array); echo(count($_SESSION['test'])); ?&gt; </code></pre> <p>yields:</p> <p>Array ( [0] => Array ( [id] => 11 ) [1] => Array ( [id] => 22 ) [3] => Array ( [id] => 33 ) [4] => Array ( [id] => 445 ) [6] => Array ( [id] => 7908 ) ) 5</p> <p>I think this is what you're looking for.</p>
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    1. POcount() not returning correct number of array elements
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    1. USFrank
    1. USFrank
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    1. COI'm sorry, I have no idea what you're trying to illustrate here. I posted the print_r results of the arrays; the ids are NOT all the same.
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      1. USEmmyS
    2. COEssentially what he's trying to show is that the array_unique() function only inspects the values of items in an array. Simply having different keys is not enough. For `array_unique()`, `array(0 => 'apple')` is exactly the same as `array('banana' => 'apple')`.
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      1. USMr. Llama
    3. COmy guess is that PHP can't see any difference between all your stdClass Object([id] => nnnnn)
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      1. USFrank
 

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