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POPHP array_merge() function
 

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    <p>I have some problems during working with <code>arrays</code> using <code>array_merge function</code>. Here an example:</p> <p><strong>First example:</strong></p> <pre><code> $first = array('01' =&gt; 1, '03' =&gt; 73); $second = array('14'=&gt;11, '15' =&gt; 23); var_dump(array_merge($first, $second)); </code></pre> <p>Result is:</p> <pre><code>array(4) { ["01"]=&gt; int(1) ["03"]=&gt; int(73) [0]=&gt; int(11) [1]=&gt; int(23) } </code></pre> <p>Expected:</p> <pre><code>array(4) { ["01"]=&gt; int(1) ["03"]=&gt; int(73) [14]=&gt; int(11) [15]=&gt; int(23) } </code></pre> <p><strong>Second example:</strong></p> <pre><code> $first = array('01'=&gt;3, '03'=&gt;10); $second = array('05'=&gt;44, '07'=&gt;3); var_dump(array_merge($first,$second)); </code></pre> <p>Result is(as expected):</p> <pre><code>array(4) { ["01"]=&gt; int(3) ["03"]=&gt; int(10) ["05"]=&gt; int(44) ["07"]=&gt; int(3) } </code></pre> <p><strong>Third example:</strong></p> <pre><code>var_dump(array_merge(array("somekey"=&gt; array("some value")))); </code></pre> <p>Result is(as expected):</p> <pre><code>array(1) { ["somekey"]=&gt; array(1) { [0]=&gt; string(10) "some value" } } </code></pre> <p><strong>Fourth example:</strong></p> <pre><code>var_dump(array_merge(array("34"=&gt; array("some value")))); </code></pre> <p>Result is:</p> <pre><code>array(1) { [0]=&gt; array(1) { [0]=&gt; string(10) "some value" } } </code></pre> <p>Expected:</p> <pre><code>array(1) { [0]=&gt; array(1) { ["34"]=&gt; string(10) "some value" } } var_dump(array_merge(array("34"=&gt; array("some value")))); </code></pre> <p>As you can see from <code>third</code> and <code>fourth</code> examples I set string for keys but the result was not as expected. </p> <p>What is wrong or incorrect of understanding? Thanks for helping.</p> <p><strong>Edited.</strong> Why (example first and second) the result is different, but the keys are string and consist of only with digest?</p>
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    1. COseems like a bug to me php is treating '14' as on integer and therefor renumbering the keys :(
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      1. USExlord
    2. CO@Exlord - documented behaviour: `Values in the input array with __numeric keys__ will be renumbered with incrementing keys starting from zero in the result array.` (my emphasis) The leading zero of the keys in $first mean it is treated as a string; though you could make an argument that means it should be treated as an octal number
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    3. CO@MarkBaker so there is no difference between "14" and 14 ? in my opinion "14" should be considered a string and not a numeric value.
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