如何按鍵值對數組的輸出進行排序

Question

我有一個函數可輸出屬性的詳細信息，並需要按價格/平方英尺排序結果。

<?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>&nbsp;</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() 

?> 

如何通過$r_results[$rowcount]['ppsq']對這些結果的輸出進行排序？

Answer 1

你很幸運，這是建立在功能的PHP：

http://www.php.net/manual/en/function.array-multisort.php

例子：

<?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']; 

?>