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POHow to sort a table containing csv file data
 

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  1. POHow to sort a table containing csv file data
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    <p>I have to sort the file data in a table depending on how the user chooses it to be sorted (only options are ascending and descending)</p> <p>Here is my code for it:</p> <pre><code>if($submit=="Display"){ if ($headings=="0"){echo "&lt;h2&gt;Error&lt;/h2&gt;";} elseif ($search==""){echo "&lt;h2&gt;Error&lt;/h2&gt;";} else { if($headings==$headings_array[0]) echo "&lt;table border='1'&gt;"; $f = fopen("data.csv", "r"); while ($line = fgetcsv($f)){ echo "&lt;tr&gt;"; foreach ($line as $cell) { echo "&lt;td&gt;&lt;center&gt;".$cell."&lt;/center&gt;&lt;/td&gt;"; } echo "&lt;tr&gt;"; } fclose($f); function my_sort($a, $b){ if ($a == $b) return 0; return ($a &gt; $b) ? -1 : 1; } $arr = $cell; usort($arr, "my_sort"); print_r ($arr); echo "&lt;/table&gt;"; } } </code></pre> <p>But it's not sorting. Can someone spot what's wrong with it? And if you have a more efficient way of doing this, please let me know as I have 15 <code>headings</code> and it would be a pain to do <code>if statements</code> for each of those headings.</p> <p><strong>To be clear, here is what I have to do:</strong></p> <p>For each sort field (which are the headings) that the user chooses, I have to arrange the display according to that heading</p> <p>i.e <code>if($headings==$headings_array[0])</code> </p> <p><code>$headings_array[0]</code> is equal to <code>Names</code> therefore, the table should display the values in alphabetical (or reverse alphabetical) order of <code>Names</code></p> <p><strong>Extra info:</strong> </p> <p><code>$headings</code> is the name of the select box<br> <code>$headings_array</code> is the array values for the select box<br> <code>$search</code> is the radio buttons containing whether the table should be sorted as ascending or descending<br><br> <em>PHP only</em></p> <p>Any help is appreciated!</p>
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    1. COYou should really try to separate out the display logic (how to write out the html) from the application logic (reading the CSV and sorting it). There are various frameworks that enforce this (usually they call it MVC), but in general your life will be happier if you first get your data the way you want it before you print anything to the screen.
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    2. CO@Eli Alright, I guess I'll try to sort everything without the table first and add that once everything works, thanks for your time!
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    3. COwhat you should do is store the data in a database and let the database sort the records for you...
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