Sort a table

I'm using PHP to pull out a table from mysql nad spit it into the browser.

Is it possible for me to make the table sortable by the user clicking on the column headers?

See the code I'm using below.
// Execute the query
if ($result = $mysqli->query($query)) {
 
printf("<style type='text/css'>");
printf("table.sample {");
printf("border-collapse: collapse;");
printf("border-style: dotted dotted dotted dotted;");
printf("margin-left:auto; margin-right:auto;");
printf("body.sample {");
printf("text-align:center;");
printf("}");
printf("table.sample th {");
printf("border-width: 1px 1px 1px 1px;");	
printf("padding: 3px 3px 3px 3px;");
printf("border-style: dotted dotted dotted dotted;");
printf("}");
printf("table.sample td {");
printf("padding: 3px 3px 3px 3px;");
printf("border-style: dotted dotted dotted dotted;");
printf("border-width: 1px 1px 1px 1px;");
printf("}");
printf("</style>");
 
 
printf("<body class='sample'>");
printf("<table class='sample' border='1'>");
printf("<tr>");
 
// Output the headers
$fields = $result->fetch_fields();
foreach ($fields as $field)
 
printf("<th align='left'>%s</th>", $field->name);
printf("</tr>");
 
 
// Output the results
while ($table = $result->fetch_row()) {
$field1 = $table[0];
$field2 = $table[1];
$field3 = $table[2];
$field4 = $table[3];
$field5 = $table[4];
$field6 = $table[5];
//$field7 = $table[6];
//$field8 = $table[7];
//$field9 = $table[8];
//$field10 = $table[9];
 
printf("<tr>");
printf("<td>%s</td><td>%s</td>", $field1, $field2);
printf("<td>%s</td><td>%s</td>", $field3, $field4);
printf("<td>%s</td><td>%s</td>", $field5, $field6);
//printf("<td>%s</td><td>%s</td>", $field7, $field8);
//printf("<td>%s</td><td>%s</td>", $field9, $field10);
 
printf("</tr>");
}
printf("</TABLE>");
printf("<p>");
 
}

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LVL 2
lee_jdAsked:
Who is Participating?
 
Ray PaseurConnect With a Mentor Commented:
Here is some sample code showing how to use the GET string in the URL to signal which ORDER BY clause to use in the query.  Look it over and post back here if you have any questions. Best, ~Ray
<?php 
require_once('config.php');
 
// ANALYZE GET STRING FOR THE ORDER BY CLAUSE
switch ($_GET[q])
{
   case "a": $orderby = 'ORDER BY s_aname, s_url';                 break;
   case "t": $orderby = 'ORDER BY s_city, s_camp, s_url';          break;
   case "c": $orderby = 'ORDER BY s_camp, s_state, s_url';         break;
   case "l": $orderby = 'ORDER BY s_lastcall, s_url';              break;
   case "s": $orderby = 'ORDER BY s_state, s_city, s_camp, s_url'; break;
   default:  $orderby = 'ORDER BY s_url, s_camp';
}
 
 
// THE QUERY HERE
$ssql = "SELECT * FROM {$my_dbt_prefix}_PROSPECTS WHERE s_source = \"XYZ\" ";
$ssql .= "AND (s_state = \"PA\"
            OR s_state = \"MD\"
            OR s_state = \"VA\"
            OR s_state = \"DE\"
            OR s_state = \"WV\"
            OR s_state = \"NJ\"
            OR s_state = \"NC\"
            OR s_state = \"SC\")
 
            AND (s_id <> \"OK\")
            AND (s_id <> \"DEAD\")
            $orderby ";
 
 
// HERE IS THE CODE TO GIVE SORTING OPTIONS:
echo "<a name=\"top\"></a>\n";
echo "<p>";
echo "<a href=\"$PHP_SELF?q=a\">DIRNAME</a> | ";
echo "<a href=\"$PHP_SELF?q=c\">CAMP</a> | ";
echo "<a href=\"$PHP_SELF?q=l\">LASTCALL</a> | ";
echo "<a href=\"$PHP_SELF?q=t\">CITY</a> | ";
echo "<a href=\"$PHP_SELF?q=s\">STATE</a>  ";
echo "</p>\n";

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0
 
LinuxNubbCommented:
This is absolutely possible, but not easy to implement.  You will need to keep track of the current column you are sorting, and also the direction you are sorting it.  Once the page reloads, you'll need to check if the the column is already being sorted, and if it is then sort it the other way.
0
 
lee_jdAuthor Commented:
This is great.   One other thing.  What is the SQL to sort in reverse order?
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lee_jdAuthor Commented:
It's okay I found it DESC.

Thanks for your help.
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lee_jdAuthor Commented:
Top class answer - very helpful.
0
 
Ray PaseurCommented:
Thanks for the points; it's a great question, and regarding this: "It's okay I found it DESC." -- that is exactly right.  You can mix the ORDER BY statement, too, for example, to see the largest and most recent sales in each state, you might use something like this: "ORDER BY sales_date DESC, sales_price DESC, sales_state ASC"  The default is ASC for each field in ORDER BY.

Best, ~Ray
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