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  1. PO
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    <p>You have error in else thread because you have two closing divs in it. Also you can't have repeated <code>id</code></p> <p>I can't understand do you want 3 columns or 3 rows? If you want 3 columns that your code will not work on <code>totalBoxes</code> mote than 9 (it will produce more columns).</p> <p>I suggest you to use following logic:</p> <pre><code>&lt;style&gt; .column {float: left; padding: 10px; width: 100px; border: solid thin red; background-color: green; margin-right: 5px} .box {width: 100%; height: 100px; background-color: white; margin-bottom: 5px; } &lt;/style&gt; &lt;?php $boxes_in_column = ceil($totalBoxes / 3); echo('&lt;div class="column"&gt;Column 1'); for ($i = 1; $i &lt;= $totalBoxes; $i++) { echo('&lt;div class="box"&gt;'.$i.'&lt;/div&gt;'); if (($i % $boxes_in_column) === 0){ echo('&lt;/div&gt;&lt;div class="column"&gt;Column '.(ceil($i / $boxes_in_column)+1)); } } echo('&lt;/div&gt;'); ?&gt; </code></pre> <p>It will produce extra empty column if you have total boxes divided by 3 without remainder. So try to fix it yourself.</p> <p><img src="https://i.stack.imgur.com/jBAL4.png" alt="three columns"></p> <p>Horizontal fill</p> <pre><code>&lt;style&gt; .box1 {display: inline-block; width: 100px; height: 100px; background-color: white; margin: 5px; } .parent {background-color: blue; border: solid thin red; width: 330px} &lt;/style&gt; &lt;?php $totalBoxes = 13; echo '&lt;div class="parent"&gt;'; for ($i = 1; $i &lt;= $totalBoxes; $i++) { echo('&lt;div class="box1"&gt;'.$i.'&lt;/div&gt;'); } echo '&lt;/div&gt;'; ?&gt; </code></pre> <p><img src="https://i.stack.imgur.com/UTvwz.png" alt="horizontal fill"></p>
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    1. POLogic error creating DIV grid with CSS and PHP
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    1. COI want 3 columns. But i want to fill the columns with however many boxes is necessary. The closing div is the matching div for the column div.
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      1. USJasonBourne
    2. COi edited my answer and added sample code, it can be typos, i haven't tested it.
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      1. USYaroslav
    3. COyes, you're right, that closing div is for column BUT it will close your column right after first iteration. Check out your HTML code produced. Also you will never get Column1, Column2, Column3 with that code because `$i` increases with boxes.
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