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POInteger division in PHP produces zero - how to cast it to float?
 

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  1. POInteger division in PHP produces zero - how to cast it to float?
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    <p>In <a href="http://preferans.de" rel="nofollow noreferrer">a Russian card game</a> I'm trying to keep statistics of how often a player swears (says "bad words" - and we do have a lot of them in Russian language) in the following PostgreSQL table:</p> <pre><code># select * from pref_chat order by swear desc; id | swear | lines -------------------------+-------+------- OK194281930260 | 3 | 153 OK350321778615 | 2 | 127 DE12770 | 2 | 339 OK122898831181 | 2 | 63 OK349829847011 | 2 | 126 OK215240745969 | 1 | 66 OK459742722980 | 1 | 96 </code></pre> <p>And I need to generate an integer number of this data - between 1 and 100 (overflowing is okay) - so that I can create the following <em>"swear'o'meter</em>:</p> <p><img src="https://i.stack.imgur.com/TO9na.png" alt="enter image description here"></p> <p>So I'm trying (with PHP 5.3 at CentOS 6.2):</p> <pre><code> $sth = $db-&gt;prepare('select swear, lines from pref_chat where id=?'); $sth-&gt;execute(array($id)); if ($row = $sth-&gt;fetch(PDO::FETCH_ASSOC)) { $quotient = 100 * floor(20 * $row['swear'] / (1 + $row['lines'])); print('&lt;p&gt;&lt;img src="https://chart.googleapis.com/chart?chs=700x100&amp;cht=gom&amp;chco=00FF00,FFFF00,FF0000&amp;chxt=x&amp;chxl=0:|Swearometer&amp;chd=t:' . $quotient . '" width=700 height=100 alt="Swearometer"&gt;&lt;/p&gt;)'; } </code></pre> <p>Unfortunately I get zero - because PHP is probably doing an "integer division".</p> <p>I've tried to prepend <strong>floor()</strong> to <strong>$row['swear']</strong> and <strong>$row['lines']</strong> to "cast" them to float - but this didn't help.</p> <p><strong>UPDATE:</strong></p> <p>Sorry, I had a typo in my original question... The $quotient is really 0, I print it out. I've also tried the following, but still zero:</p> <pre><code>$quot = 100 * floor(20 * $row['swear'] / (.1 + $row['lines'])); </code></pre>
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    1. CO+1 for swearometer...
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    2. COConsider moving the computation from the PHP side to the database; they are exceptionally powerful tools for data crunching and this is a perfect example.
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