php - 如何将 MySQL foreach 循环添加到 DOMDocument XML

Question

这是我想到的，它似乎适用于返回一条记录，但是如果数据库中有多个记录(wp_hud_display.id)，它会破坏 XML，“foreach”会在while 循环？我如何将它添加到我的代码中？

<?php    
// create a dom document with encoding utf8 
$domtree = new DOMDocument('1.0', 'UTF-8');

//database configuration
$config['mysql_host'] = "localhost";
$config['mysql_user'] = "root";
$config['mysql_pass'] = "";
$config['db_name']    = "tasmanhud";

//connect to host
mysql_connect($config['mysql_host'],$config['mysql_user'],$config['mysql_pass']);

//select database
@mysql_select_db($config['db_name']) or die( "Unable to select database");

//select all items in table
$sql = "SELECT
  wp_hud_display.id,
  wp_hud_display.name,
  wp_hud_display.resolution,
  wp_hud_display.user_id,
  wp_hud_display.instrument_id_1,
  wp_hud_display.x_loc_1,
  wp_hud_display.y_loc_1,
  wp_hud_display.layer_1,
  wp_hud_display.instrument_id_2,
  wp_hud_display.x_loc_2,
  wp_hud_display.y_loc_2,
  wp_hud_display.layer_2,
  wp_hud_display.instrument_id_3,
  wp_hud_display.x_loc_3,
  wp_hud_display.y_loc_3,
  wp_hud_display.layer_3,
  wp_hud_display.instrument_id_4,
  wp_hud_display.x_loc_4,
  wp_hud_display.y_loc_4,
  wp_hud_display.layer_4,
  wp_hud_instrument.inst_id AS inst1_id,
  wp_hud_instrument.name AS inst1_name,
  wp_hud_instrument.image_file AS inst1_image,
  wp_hud_instrument.font_type AS inst1_ft,
  wp_hud_instrument.font_size AS inst1_fs,
  wp_hud_instrument_1.inst_id AS inst2_id,
  wp_hud_instrument_1.name AS inst2_name,
  wp_hud_instrument_1.image_file AS inst2_image,
  wp_hud_instrument_1.font_type AS inst2_ft,
  wp_hud_instrument_1.font_size AS inst2_fs,
  wp_hud_instrument_2.inst_id AS inst3_id,
  wp_hud_instrument_2.name AS inst3_name,
  wp_hud_instrument_2.image_file AS inst3_image,
  wp_hud_instrument_2.font_type AS inst3_ft,
  wp_hud_instrument_2.font_size AS inst3_fs,
  wp_hud_instrument_3.inst_id AS inst4_id,
  wp_hud_instrument_3.name AS inst4_name,
  wp_hud_instrument_3.image_file AS inst4_image,
  wp_hud_instrument_3.font_type AS inst4_ft,
  wp_hud_instrument_3.font_size AS inst4_fs
FROM wp_hud_display
  LEFT JOIN wp_hud_instrument
    ON wp_hud_display.instrument_id_1 = wp_hud_instrument.inst_id
  LEFT JOIN wp_hud_instrument wp_hud_instrument_1
    ON wp_hud_display.instrument_id_2 = wp_hud_instrument_1.inst_id
  LEFT JOIN wp_hud_instrument wp_hud_instrument_2
    ON wp_hud_display.instrument_id_3 = wp_hud_instrument_2.inst_id
  LEFT JOIN wp_hud_instrument wp_hud_instrument_3
    ON wp_hud_display.instrument_id_4 = wp_hud_instrument_3.inst_id
WHERE wp_hud_display.user_id = 1
GROUP BY wp_hud_display.id";

/* create the root element of the xml tree */
$xmlRoot = $domtree->createElement("wp_hud_displays");
/* append it to the document created */
$xmlRoot = $domtree->appendChild($xmlRoot);

$hud_display_group = $domtree->createElement("hud_display_group");
$hud_display_group = $xmlRoot->appendChild($hud_display_group);

$hud_display = $domtree->createElement("hud_display");
$hud_display = $hud_display_group->appendChild($hud_display);

$instrument_id_1 = $domtree->createElement("instrument_id_1");
$instrument_id_1 = $hud_display->appendChild($instrument_id_1);

$instrument_id_2 = $domtree->createElement("instrument_id_2");
$instrument_id_2 = $hud_display->appendChild($instrument_id_2);

$instrument_id_3 = $domtree->createElement("instrument_id_3");
$instrument_id_3 = $hud_display->appendChild($instrument_id_3);

$instrument_id_4 = $domtree->createElement("instrument_id_4");
$instrument_id_4 = $hud_display->appendChild($instrument_id_4);

    $result = mysql_query($sql);
    if (!$result) {
        die('Invalid query: ' . mysql_error());
    }

    if(mysql_num_rows($result)>0)
    {
       while($result_array = mysql_fetch_assoc($result))
       {

    /* you should enclose the following two lines in a cicle */

$hud_display->appendChild($domtree->createElement('id',$result_array['id']));
$hud_display->appendChild($domtree->createElement('name',$result_array['name']));
$hud_display->appendChild($domtree->createElement('resolution',$result_array['resolution']));
$hud_display->appendChild($domtree->createElement('user_id',$result_array['user_id']));

// Instrument 1
$hud_display->appendChild($domtree->createElement('instrument_id_1',$result_array['instrument_id_1']));
$instrument_id_1->appendChild($domtree->createElement('inst_id',$result_array['inst1_id']));
$instrument_id_1->appendChild($domtree->createElement('name',$result_array['inst1_name']));
$instrument_id_1->appendChild($domtree->createElement('image_name',$result_array['inst1_image']));
$instrument_id_1->appendChild($domtree->createElement('font_type',$result_array['inst1_ft']));  
$instrument_id_1->appendChild($domtree->createElement('font_size',$result_array['inst1_fs']));
$hud_display->appendChild($domtree->createElement('x_loc_1',$result_array['x_loc_1']));
$hud_display->appendChild($domtree->createElement('y_loc_1',$result_array['y_loc_1']));
$hud_display->appendChild($domtree->createElement('layer_1',$result_array['layer_1']));

// Instrument 2
$hud_display->appendChild($domtree->createElement('instrument_id_2',$result_array['instrument_id_2']));
$instrument_id_2->appendChild($domtree->createElement('inst_id',$result_array['inst2_id']));
$instrument_id_2->appendChild($domtree->createElement('name',$result_array['inst2_name']));
$instrument_id_2->appendChild($domtree->createElement('image_name',$result_array['inst2_image']));
$instrument_id_2->appendChild($domtree->createElement('font_type',$result_array['inst2_ft']));  
$instrument_id_2->appendChild($domtree->createElement('font_size',$result_array['inst2_fs']));
$hud_display->appendChild($domtree->createElement('x_loc_2',$result_array['x_loc_2']));
$hud_display->appendChild($domtree->createElement('y_loc_2',$result_array['y_loc_2']));
$hud_display->appendChild($domtree->createElement('layer_2',$result_array['layer_2']));

// Instrument 3 
$hud_display->appendChild($domtree->createElement('instrument_id_3',$result_array['instrument_id_3']));
    $instrument_id_3->appendChild($domtree->createElement('inst_id',$result_array['inst3_id']));       $instrument_id_3->appendChild($domtree->createElement('name',$result_array['inst3_name']));
$instrument_id_3->appendChild($domtree->createElement('image_name',$result_array['inst3_image']));
$instrument_id_3->appendChild($domtree->createElement('font_type',$result_array['inst3_ft']));  $instrument_id_3->appendChild($domtree->createElement('font_size',$result_array['inst3_fs']));
$hud_display->appendChild($domtree->createElement('x_loc_3',$result_array['x_loc_3']));
$hud_display->appendChild($domtree->createElement('y_loc_3',$result_array['y_loc_3']));
$hud_display->appendChild($domtree->createElement('layer_3',$result_array['layer_3']));



    // Instrument 4
 $hud_display->appendChild($domtree->createElement('instrument_id_4',$result_array['instrument_id_4']));
    $instrument_id_4->appendChild($domtree->createElement('inst_id',$result_array['inst4_id']));
    $instrument_id_4->appendChild($domtree->createElement('name',$result_array['inst4_name']));
    $instrument_id_4->appendChild($domtree->createElement('image_name',$result_array['inst4_image']));
    $instrument_id_4->appendChild($domtree->createElement('font_type',$result_array['inst4_ft']));  
    $instrument_id_4->appendChild($domtree->createElement('font_size',$result_array['inst4_fs'])); $hud_display->appendChild($domtree->createElement('x_loc_4',$result_array['x_loc_4']));
    $hud_display->appendChild($domtree->createElement('y_loc_4',$result_array['y_loc_4']));
    $hud_display->appendChild($domtree->createElement('layer_4',$result_array['layer_4']));

            }
        }
    // get the xml printed 

       echo $domtree->saveXML();



        //send the xml header to the browser

    header ("Content-Type:text/xml");


        //output the XML data

    echo $xml;
    ?>

这是当只有一组值要返回时的显示方式(wp_hud_display.id)

<wp_hud_displays>
     <hud_display_group>
       <hud_display>
         <instrument_id_1></instrument_id_1>
         <instrument_id_2></instrument_id_2>
         <instrument_id_3></instrument_id_3>
         <instrument_id_4></instrument_id_4>
       <id>1</id>
       <name>test display</name>
       <resolution>1080p</resolution>
       <user_id>1</user_id>
       <instrument_id_1>1</instrument_id_1>
       <x_loc_1>89</x_loc_1>
       <y_loc_1>79</y_loc_1>
       <layer_1>1</layer_1>
       <instrument_id_2>2</instrument_id_2>
       <x_loc_2>988</x_loc_2>
       <y_loc_2>98</y_loc_2>
       <layer_2>1</layer_2>
       <instrument_id_3>3</instrument_id_3>
       <x_loc_3>89</x_loc_3>
       <y_loc_3>90</y_loc_3>
       <layer_3>1</layer_3>
       <instrument_id_4>4</instrument_id_4>
       <x_loc_4>67</x_loc_4>
       <y_loc_4>76</y_loc_4>
       <layer_4>1</layer_4>
      </hud_display>
     </hud_display_group>
    </wp_hud_displays>

当有多个 wp_hud_display.id WHERE user_id=1 时如何显示

1test1_gauge001-2_zpsdbe86ca1f.jpg11PID_DISTANCE30100002500101223dfd34412sdf34534056Arail122test1_needle11PID_ENGINE_LOAD211000025200160112025000000002test1_needle11PID_ENGINE_LOAD211000025200160112025000000003new gaugedfsgsdfgfd435430PID_COOLANT_TEMP2434534541023324000000003new gaugedfsgsdfgfd435430PID_COOLANT_TEMP2434534541023324000000004Bla100.jpg2702334395910299000000004Bla100.jpg2702334395910299000000002test1_needle11PID_ENGINE_LOAD211000025200160112025000000001test display1080p118979129889813899014677612dsfdsfsd720p12321342323213224232123143423444342

我追求的是无论它返回多少组记录，它都看起来像正确的 XML 输出(如第一个示例)。

Answer 1

如果您希望 hud_display 节点重复，请在 while 内包含，每次迭代都会创建一个新的 hud_display。像这样的事情必须起作用:

    // create a dom document with encoding utf8 
    $domtree = new DOMDocument('1.0', 'UTF-8');

    //database configuration and extract your data

    /* create the root element of the xml tree */
    $xmlRoot = $domtree->createElement("wp_hud_displays");
    /* append it to the document created */
    $xmlRoot = $domtree->appendChild($xmlRoot);

    $hud_display_group = $domtree->createElement("hud_display_group");
    $hud_display_group = $xmlRoot->appendChild($hud_display_group);

    $result = mysql_query($sql);
    if (!$result) {
        die('Invalid query: ' . mysql_error());
    }

    if(mysql_num_rows($result)>0)
    {
       while($result_array = mysql_fetch_assoc($result))
       {
            $hud_display = $domtree->createElement("hud_display");
            $hud_display = $hud_display_group->appendChild($hud_display);

            $instrument_id_1 = $domtree->createElement("instrument_id_1");
            $instrument_id_1 = $hud_display->appendChild($instrument_id_1);

            $instrument_id_2 = $domtree->createElement("instrument_id_2");
            $instrument_id_2 = $hud_display->appendChild($instrument_id_2);

            $instrument_id_3 = $domtree->createElement("instrument_id_3");
            $instrument_id_3 = $hud_display->appendChild($instrument_id_3);

            $instrument_id_4 = $domtree->createElement("instrument_id_4");
            $instrument_id_4 = $hud_display->appendChild($instrument_id_4);

            /* you should enclose the following two lines in a cicle */

            $hud_display->appendChild($domtree->createElement('id',$result_array['id']));
            $hud_display->appendChild($domtree->createElement('name',$result_array['name']));
            $hud_display->appendChild($domtree->createElement('resolution',$result_array['resolution']));
            $hud_display->appendChild($domtree->createElement('user_id',$result_array['user_id']));

            // Instrument 1
            $hud_display->appendChild($domtree->createElement('instrument_id_1',$result_array['instrument_id_1']));
            $instrument_id_1->appendChild($domtree->createElement('inst_id',$result_array['inst1_id']));
            $instrument_id_1->appendChild($domtree->createElement('name',$result_array['inst1_name']));
            $instrument_id_1->appendChild($domtree->createElement('image_name',$result_array['inst1_image']));
            $instrument_id_1->appendChild($domtree->createElement('font_type',$result_array['inst1_ft']));  
            $instrument_id_1->appendChild($domtree->createElement('font_size',$result_array['inst1_fs']));
            $hud_display->appendChild($domtree->createElement('x_loc_1',$result_array['x_loc_1']));
            $hud_display->appendChild($domtree->createElement('y_loc_1',$result_array['y_loc_1']));
            $hud_display->appendChild($domtree->createElement('layer_1',$result_array['layer_1']));

            // Instrument 2
            $hud_display->appendChild($domtree->createElement('instrument_id_2',$result_array['instrument_id_2']));
            $instrument_id_2->appendChild($domtree->createElement('inst_id',$result_array['inst2_id']));
            $instrument_id_2->appendChild($domtree->createElement('name',$result_array['inst2_name']));
            $instrument_id_2->appendChild($domtree->createElement('image_name',$result_array['inst2_image']));
            $instrument_id_2->appendChild($domtree->createElement('font_type',$result_array['inst2_ft']));  
            $instrument_id_2->appendChild($domtree->createElement('font_size',$result_array['inst2_fs']));
            $hud_display->appendChild($domtree->createElement('x_loc_2',$result_array['x_loc_2']));
            $hud_display->appendChild($domtree->createElement('y_loc_2',$result_array['y_loc_2']));
            $hud_display->appendChild($domtree->createElement('layer_2',$result_array['layer_2']));

            // Instrument 3 
            $hud_display->appendChild($domtree->createElement('instrument_id_3',$result_array['instrument_id_3']));
            $instrument_id_3->appendChild($domtree->createElement('inst_id',$result_array['inst3_id']));       
            $instrument_id_3->appendChild($domtree->createElement('name',$result_array['inst3_name']));
            $instrument_id_3->appendChild($domtree->createElement('image_name',$result_array['inst3_image']));
            $instrument_id_3->appendChild($domtree->createElement('font_type',$result_array['inst3_ft']));  
            $instrument_id_3->appendChild($domtree->createElement('font_size',$result_array['inst3_fs']));
            $hud_display->appendChild($domtree->createElement('x_loc_3',$result_array['x_loc_3']));
            $hud_display->appendChild($domtree->createElement('y_loc_3',$result_array['y_loc_3']));
            $hud_display->appendChild($domtree->createElement('layer_3',$result_array['layer_3']));

            // Instrument 4
            $hud_display->appendChild($domtree->createElement('instrument_id_4',$result_array['instrument_id_4']));
            $instrument_id_4->appendChild($domtree->createElement('inst_id',$result_array['inst4_id']));
            $instrument_id_4->appendChild($domtree->createElement('name',$result_array['inst4_name']));
            $instrument_id_4->appendChild($domtree->createElement('image_name',$result_array['inst4_image']));
            $instrument_id_4->appendChild($domtree->createElement('font_type',$result_array['inst4_ft']));  
            $instrument_id_4->appendChild($domtree->createElement('font_size',$result_array['inst4_fs'])); 
            $hud_display->appendChild($domtree->createElement('x_loc_4',$result_array['x_loc_4']));
            $hud_display->appendChild($domtree->createElement('y_loc_4',$result_array['y_loc_4']));
            $hud_display->appendChild($domtree->createElement('layer_4',$result_array['layer_4']));

        }
    }
// get the xml printed 
echo $domtree->saveXML();

//send the xml header to the browser
header ("Content-Type:text/xml");

//output the XML data
echo $xml;