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POMath Results Inaccurate PHP
 

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    <p>Are there any rules to using math within PHP. I'm getting some off the wall numbers when I try to do some simple math. </p> <p>Here is the specific script</p> <pre><code> $profit = $quote_1 - $entry; </code></pre> <p>Here is a snippet of the full script</p> <pre><code> if ($productCount &gt; 0) { // get all the product details while($row = mysql_fetch_array($sql)){ $id = $row["id"]; $symbol = $row["symbol"]; $sym = strtoupper($sym); $entry = $row["entry"]; $exit = $row["exit"]; $openclosed = $row["openclosed"]; $entrydate = $row["entrydate"]; $profit = $quote_1 - $entry; $color = "#000000"; $positive = ""; if ($profit &gt;= 0){ $color = "#00a900"; $positive = "+"; } else if ($profit &lt; 0){ $color = "#ef3600"; $positive = "";} if(empty($symbol)) { echo nothing; } else { $open = fopen("http://quote.yahoo.com/d/quotes.csv?s=$symbol&amp;f=sl1d1t1c1ohgv&amp;e=.csv", "r"); $quote = fread($open, 1000); fclose($open); $quote = str_replace("\"", "", $quote); $quote = explode(",", $quote); $quote_0 = ($quote[0]); $quote_1 = ((float)$quote[1]); $quote_2 = ($quote[2]); $quote_3 = ($quote[3]); $quote_4 = ((float)$quote[4]); $quote_5 = ((float)$quote[5]); $quote_6 = ((float)$quote[6]); $quote_7 = ((float)$quote[7]); $quote_8 = ((float)$quote[8]); echo "&lt;ul&gt;&lt;li&gt;&lt;div class='wrapPicks'&gt; &lt;div class='symbolPicks'&gt; &lt;div class='quoteTitle'&gt;$quote_0&lt;/div&gt; &lt;/div&gt; &lt;div class='bgPicks'&gt; &lt;div class='quote'&gt;Entry Price: $$entry&lt;/div&gt; &lt;div class='quote'&gt;Last trade: $$quote_1&lt;/div&gt; &lt;!--&lt;div class='quote'&gt;Date: $quote_2&lt;/div&gt;--&gt; &lt;div class='quote'&gt;Open P/L: &lt;div class='bigGreen'&gt;&lt;span style=\"color: $color\"&gt;$positive $$profit &lt;/span&gt;&lt;/div&gt;&lt;/div&gt; &lt;!-- &lt;div class='quote'&gt;Change From Previous Close: $$quote_4&lt;/div&gt;--&gt; &lt;!--&lt;div class='quote'&gt;High: $$quote_6&lt;/div&gt; &lt;div class='quote'&gt;Low: $$quote_7&lt;/div&gt; &lt;div class='quote'&gt;Volume: $quote_8&lt;/div&gt;--&gt; &lt;/div&gt; &lt;/div&gt;&lt;/li&gt;&lt;/ul&gt;"; } </code></pre> <p>Now something I thought of was that the yahoo data was coming in as a string possible and that may have been throwing things off. I'm also unclear as to whether my MYSQL table must be an int or is a VARChAR acceptable? </p>
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    1. COwhat math? PHP can do math just fine. More like, "is there any problem with my code?" You are using variable variables, so there's one major source of bugs.
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    2. COYou can determine how accurate the float numbers should be. Anyway I find your question too unclear to give an answer.
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    3. COI see no math here. You're just echoing strings, and casting some of them to floats. No math.
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      1. USmeagar
 

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