我有一个输出属性详细信息的函数，需要按价格/平方英尺对结果进行排序。
<?php
//get search results!
if ($dbh)
{
$sql = sql_spShowMemberSearch($_SESSION['r_search']); //create query from search vals
$tout .= "<p><b>sql_spShowMemberSearch</b>: " . $sql . "</p>";
$result=odbc_exec($dbh, $sql); //create db recordset
if (isset($r_results)) { unset($r_results); }
if (isset($_SESSION['r_results'])) { unset($_SESSION['r_results']); }
//store recordset in array for use after closing db connection
while(odbc_fetch_row($result)) // getting data
{
$rowcount++;
//store values needed
//$r_results[$rowcount]['IsUs'] = odbc_result($result, 1); // IsUs
$r_results[$rowcount]['intID'] = odbc_result($result, 2); // intID
$r_results[$rowcount]['currentprice'] = odbc_result($result, 3); // CurrentPrice
$r_results[$rowcount]['beds'] = odbc_result($result, 4); // Beds
$r_results[$rowcount]['bath'] = odbc_result($result, 5); // Bath
$r_results[$rowcount]['year'] = odbc_result($result, 6); // Year
$r_results[$rowcount]['sf'] = odbc_result($result, 7); // SF
$r_results[$rowcount]['address'] = odbc_result($result, 8); // Address
$r_results[$rowcount]['community'] = odbc_result($result, 9); // Community
$r_results[$rowcount]['office'] = odbc_result($result, 10); // Office
$r_results[$rowcount]['agent'] = odbc_result($result, 11); // Agent
//$r_results[$rowcount]['Type'] = odbc_result($result, 12); // Type
$r_results[$rowcount]['photopath'] = odbc_result($result, 13); // PhotoPath
$r_results[$rowcount]['pics'] = odbc_result($result, 14); // Pics
$r_results[$rowcount]['mlsid'] = odbc_result($result, 15); // MLSID
$r_results[$rowcount]['city'] = odbc_result($result, 16); // City
$r_results[$rowcount]['long'] = odbc_result($result, 17); // Long
$r_results[$rowcount]['lat'] = odbc_result($result, 18); // Lat
$r_results[$rowcount]['source'] = odbc_result($result, 19); // Source
//$r_results[$rowcount]['Tracked'] = odbc_result($result, 20); // Tracked
$r_results[$rowcount]['status'] = odbc_result($result, 21); // Status
//$r_results[$rowcount]['PageRow'] = odbc_result($result, 22); // PageRow
$r_results[$rowcount]['ppsq'] = number_format(odbc_result($result, 3)/odbc_result($result, 7)); // Status
$plcity = strtoupper(trim(preg_replace("/[^A-Za-z0-9[:space:]]/","",$r_results[$rowcount]['city'])));
$plcity = str_replace(" ","-",$plcity);
$pladdr = strtoupper(trim(preg_replace("/[^A-Za-z0-9[:space:]]/","",$r_results[$rowcount]['address'])));
$pladdr = str_replace(" ","-",$pladdr);
$plmls = trim($r_results[$rowcount]['mlsid']);
$r_results[$rowcount]['permalink'] = "http://www.fairplay.com/realty/details/".$plcity."/".$pladdr."/".$plmls;
}
if ($rowcount==0) {
if ($page_current == 1 ) {
$e_msg[] = 'No results found! Please modify your search parameters (above).';
} else {
$e_msg[] = 'We ran out of search results, please go back or modify your search criteria to find additional matches.';
}
}
if ( $rowcount < $page_size ) {
//since we can't rely on DB result for total count try not to let users page to non existant pages
$_SESSION['r_search']['total_results'] = ($_SESSION['r_search']['page_start'] + ($rowcount-1));
}
//close connection
odbc_close ($dbh);
} //if $dbh
else echo "odbc not connected <br>";
//end get search results
function display_results($r_results) {
$rowcount = 0;
foreach ($r_results as $key=>$value) {
$rowcount ++;
if ( $rowcount == 1 ) {
echo "\n<h3>Results for Real Estate in <span class='location'>".strtoupper($_SESSION['r_search']['searchtext'])."</span></h3>";
echo "\n<h4><strong>".number_format($_SESSION['r_search']['total_results'])."</strong> properties match your search</h4>\n";
echo "\n<table id=\"realty\">\n";
echo "<thead>\n";
echo "<th class=\"photos\">Photos</th> \n";
echo "<th class=\"address\">Address</th> \n";
echo "<th class=\"community\">Community</th> \n";
echo "<th class=\"numeric\">Price</th> \n";
echo "<th class=\"beds\">Beds</th> \n";
echo "<th class=\"bath\">Bath</th> \n";
echo "<th class=\"year\">Year</th> \n";
echo "<th class=\"numeric sf\">SQFT</th> \n";
echo "<th class=\"mls\">MLS #</th> \n";
echo "<th class=\"status\">Status</th> \n";
echo "<th> </th> \n";
echo "</thead> \n";
}
// echo "Row: $key<br/>";
// make row
echo "<tr> \n";
echo "<td class=\"photos\"><a style=\"cursor:pointer;\" target=\"_blank\" href=\"/realty/detail/".$r_results[$rowcount]['intID']."\"><img src=\"";
if ( isset($r_results[$key]['photopath']) ) {
echo "http://www.foreclosuredatasystems.com/images/FullMLS/" . str_replace("\\","/",$r_results[$key]['photopath'])."/".$r_results[$key]['mlsid'] . "-01.jpg";
} else {
echo "http://fairplay.com/img/fr_home_thumb.jpg";
}
//echo str_replace("\\","/",$r_results[$key]['photopath'])."/".$r_results[$key]['mlsid'] ;
echo "\" alt=\"photographs provided by MLS listing service providers\" width=\"100\" /></a></td> \n";
echo "<td class=\"address\"> \n";
echo "<p>".$r_results[$key]['address']."<br /> \n";
echo " ".$r_results[$key]['city']."</p> \n";
echo "<!--<a href=\"#?lat=".$r_results[$key]['lat']."&long=".$r_results[$key]['long']."\" class=\"map\">Map this</a>--> \n";
echo "</td> \n";
echo "<td class=\"community\">".$r_results[$key]['community']."</td> \n";
echo "<td class=\"price\">\$".number_format($r_results[$key]['currentprice'])."</td> \n";
echo "<td class=\"beds\">".$r_results[$key]['beds']."</td> \n";
echo "<td class=\"bath\">".$r_results[$key]['bath']."</td> \n";
echo "<td class=\"year\">".$r_results[$key]['year']."</td> \n";
echo "<td class=\"sf\">".number_format($r_results[$key]['sf'])."</td> \n";
echo "<td class=\"mls\">".$r_results[$key]['mlsid']."</td> \n";
echo "<td class=\"status\">".$r_results[$key]['status']."</td> \n";
echo "<td class=\"action\"><a href=\"/realty/detail/".$r_results[$rowcount]['intID']."\">View Details</a><!--".$key."--></td> \n";
echo "</tr> \n";
echo "<tr class=\"extra\"> \n";
echo "<td class=\"photos\"><!--<a href=\"#\">".$r_results[$key]['pics']." photos</a>--></td> \n";
echo "<td colspan=\"10\" class=\"source\">Listing courtesy of: ".$r_results[$key]['source']." / ".$r_results[$key]['office']."</td> \n";
echo "</tr> \n";
} // END FOREACH LOOP
echo "</table >\n";
} //function display_results()
?>
如何按$r_results[$rowcount]['ppsq']对这些结果的输出进行排序？
答案 0 :(得分：1)
你很幸运，这是一个内置功能的PHP：
http://www.php.net/manual/en/function.array-multisort.php
示例：
<?php
$r_results = array();
$r_results[0] = array('photopath' => '/photo/1', 'ppsq' => 12);
$r_results[1] = array('photopath' => '/photo/7', 'ppsq' => 456);
$r_results[2] = array('photopath' => '/photo/2', 'ppsq' => 789);
$r_results[3] = array('photopath' => '/photo/9', 'ppsq' => 123);
$r_results[4] = array('photopath' => '/photo/3', 'ppsq' => 23);
$r_results[5] = array('photopath' => '/photo/5', 'ppsq' => 1);
$ppsqs = array();
foreach ($r_results as $key => $arr) {
$ppsqs[$key] = $arr['ppsq'];
}
array_multisort($ppsqs, SORT_DESC, $r_results);
echo $r_results[0]['photopath'];
echo "\n";
echo $r_results[1]['photopath'];
?>