PHP monkey eats peaches

Monkey eats peach:
Eat half on the first day +1;
Eat half the next day +1;
10 days later, one left
Find how many

<code><span>$total</span>=<span>1</span>;
    <span>$totalar</span>=<span>array</span>();
    <span>$totalar</span>[<span>0</span>]=<span>1</span>;
    <span>for</span>(<span>$i</span>=<span>0</span>;<span>$i</span><<span>9</span>;<span>$i</span>++){
       <span>$total</span>=<span>2</span>*(<span>1</span>+<span>$total</span>);
       <span>$totalar</span>[<span>$i</span>+<span>1</span>]=<span>$total</span>;
       <span>echo</span><span>$total</span>;
    }

    <span>//将数组逆序</span><span>$totals</span>=array_reverse(<span>$totalar</span>);
    <span>//输出</span><span>for</span>(<span>$i</span>=<span>1</span>;<span>$i</span><count(<span>$totals</span>)+<span>1</span>;<span>$i</span>++){
       <span>echo</span><span>"第{$i}天"</span>.<span>$totals</span>[<span>$i</span>-<span>1</span>].<span>'<br>';
    }   </code>

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