Strings in Keys becoming Integers?
<p>I am wrote an array for all months in a year as follows:</p>

<pre><code>$MNTH["01"] = "January";
$MNTH["02"] = "February";
$MNTH["03"] = "March";
$MNTH["04"] = "April";
$MNTH["05"] = "May";
$MNTH["06"] = "June";
$MNTH["07"] = "July";
$MNTH["08"] = "August";
$MNTH["09"] = "September";
$MNTH["10"] = "October";
$MNTH["11"] = "November";
$MNTH["12"] = "December";
</code></pre>

<p>When I do a variable dump on the keys of <code>$MNTH</code> with <code>var_dump(array_keys($MNTH))</code>,
I get:</p>

<pre><code>array(12) {
 [0]=&gt; string(2) "01"
 [1]=&gt; string(2) "02"
 [2]=&gt; string(2) "03"
 [3]=&gt; string(2) "04"
 [4]=&gt; string(2) "05"
 [5]=&gt; string(2) "06"
 [6]=&gt; string(2) "07"
 [7]=&gt; string(2) "08"
 [8]=&gt; string(2) "09"
 [9]=&gt; int(10)
 [10]=&gt; int(11)
 [11]=&gt; int(12) }
</code></pre>

<p>I was expecting strings for the last three keys. How did it become integer? What should I do to correct this phenomenon?</p>
