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    • [PHP] 52. AJAX 와 XML ( AJAX and XML) - PHP 강좌, PHP5
      Web/PHP 2015. 6. 13. 14:14

      PHP Example - AJAX and XML


      1. AJAX XML Example







       위 예제는 AJAX로 XML로부터 웹페이지에서 정보를 어떻게 불러오는지에 대한 예제입니다.







      2. Example Explained - The HTML Page
       사용자가 리스트박스의 CD를 선택할 때, showCD() 함수가 실행됩니다. 

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      <html>
      <head>
      <script>
      function showCD(str) {
        if (str=="") {
          document.getElementById("txtHint").innerHTML="";
          return;
        } 
        if (window.XMLHttpRequest) {
          // code for IE7+, Firefox, Chrome, Opera, Safari
          xmlhttp=new XMLHttpRequest();
        } else {  // code for IE6, IE5
          xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
        xmlhttp.onreadystatechange=function() {
          if (xmlhttp.readyState==4 && xmlhttp.status==200) {
            document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
          }
        }
        xmlhttp.open("GET","getcd.php?q="+str,true);
        xmlhttp.send();
      }
      </script>
      </head>
      <body>
       
      <form>
      Select a CD:
      <select name="cds" onchange="showCD(this.value)">
      <option value="">Select a CD:</option>
      <option value="Bob Dylan">Bob Dylan</option>
      <option value="Bonnie Tyler">Bonnie Tyler</option>
      <option value="Dolly Parton">Dolly Parton</option>
      </select>
      </form>
      <div id="txtHint"><b>CD info will be listed here...</b></div>
       
      </body>
      </html>
      		cs




       
       showCD() 함수는 아래와 같이 작동합니다:
        - CD가 선택되었는지 확인
        - XMLHttpRequest 객체 생성
        - 서버 반응에 따라 실행할 함수 생성
        - 서버로 요청 전송
        - 파라미터 q가 추가된 URL로 알림





      3. The PHP File
       PHP 스크립트는 XML 문서 cd_catalog.xml을 로드하고, XML 파일로 질의를 실행합니다, 그리고 결과를 HTML로 반환합니다:


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      <?php
      $q=$_GET["q"];
       
      $xmlDoc = new DOMDocument();
      $xmlDoc->load("cd_catalog.xml");
       
      $x=$xmlDoc->getElementsByTagName('ARTIST');
       
      for ($i=0; $i<=$x->length-1; $i++) {
        //Process only element nodes
        if ($x->item($i)->nodeType==1) {
          if ($x->item($i)->childNodes->item(0)->nodeValue == $q) {
            $y=($x->item($i)->parentNode);
          }
        }
      }
       
      $cd=($y->childNodes);
       
      for ($i=0;$i<$cd->length;$i++) { 
        //Process only element nodes
        if ($cd->item($i)->nodeType==1) {
          echo("<b>" . $cd->item($i)->nodeName . ":</b> ");
          echo($cd->item($i)->childNodes->item(0)->nodeValue);
          echo("<br>");
        }
      }
      ?>
      		cs





       cd_catalog.xml



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      <?xml version="1.0" encoding="utf-8"?>
      <CATALOG>
          <CD>
              <TITLE>Empire Burlesque</TITLE>
              <ARTIST>Bob Dylan</ARTIST>
              <COUNTRY>USA</COUNTRY>
              <COMPANY>Columbia</COMPANY>
              <PRICE>10.90</PRICE>
              <YEAR>1985</YEAR>
          </CD>
          <CD>
              <TITLE>Hide your heart</TITLE>
              <ARTIST>Bonnie Tyler</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>CBS Records</COMPANY>
              <PRICE>9.90</PRICE>
              <YEAR>1988</YEAR>
          </CD>
          <CD>
              <TITLE>Greatest Hits</TITLE>
              <ARTIST>Dolly Parton</ARTIST>
              <COUNTRY>USA</COUNTRY>
              <COMPANY>RCA</COMPANY>
              <PRICE>9.90</PRICE>
              <YEAR>1982</YEAR>
          </CD>
          <CD>
              <TITLE>Still got the blues</TITLE>
              <ARTIST>Gary Moore</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Virgin records</COMPANY>
              <PRICE>10.20</PRICE>
              <YEAR>1990</YEAR>
          </CD>
          <CD>
              <TITLE>Eros</TITLE>
              <ARTIST>Eros Ramazzotti</ARTIST>
              <COUNTRY>EU</COUNTRY>
              <COMPANY>BMG</COMPANY>
              <PRICE>9.90</PRICE>
              <YEAR>1997</YEAR>
          </CD>
          <CD>
              <TITLE>One night only</TITLE>
              <ARTIST>Bee Gees</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Polydor</COMPANY>
              <PRICE>10.90</PRICE>
              <YEAR>1998</YEAR>
          </CD>
          <CD>
              <TITLE>Sylvias Mother</TITLE>
              <ARTIST>Dr.Hook</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>CBS</COMPANY>
              <PRICE>8.10</PRICE>
              <YEAR>1973</YEAR>
          </CD>
          <CD>
              <TITLE>Maggie May</TITLE>
              <ARTIST>Rod Stewart</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Pickwick</COMPANY>
              <PRICE>8.50</PRICE>
              <YEAR>1990</YEAR>
          </CD>
          <CD>
              <TITLE>Romanza</TITLE>
              <ARTIST>Andrea Bocelli</ARTIST>
              <COUNTRY>EU</COUNTRY>
              <COMPANY>Polydor</COMPANY>
              <PRICE>10.80</PRICE>
              <YEAR>1996</YEAR>
          </CD>
          <CD>
              <TITLE>When a man loves a woman</TITLE>
              <ARTIST>Percy Sledge</ARTIST>
              <COUNTRY>USA</COUNTRY>
              <COMPANY>Atlantic</COMPANY>
              <PRICE>8.70</PRICE>
              <YEAR>1987</YEAR>
          </CD>
          <CD>
              <TITLE>Black angel</TITLE>
              <ARTIST>Savage Rose</ARTIST>
              <COUNTRY>EU</COUNTRY>
              <COMPANY>Mega</COMPANY>
              <PRICE>10.90</PRICE>
              <YEAR>1995</YEAR>
          </CD>
          <CD>
              <TITLE>1999 Grammy Nominees</TITLE>
              <ARTIST>Many</ARTIST>
              <COUNTRY>USA</COUNTRY>
              <COMPANY>Grammy</COMPANY>
              <PRICE>10.20</PRICE>
              <YEAR>1999</YEAR>
          </CD>
          <CD>
              <TITLE>For the good times</TITLE>
              <ARTIST>Kenny Rogers</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Mucik Master</COMPANY>
              <PRICE>8.70</PRICE>
              <YEAR>1995</YEAR>
          </CD>
          <CD>
              <TITLE>Big Willie style</TITLE>
              <ARTIST>Will Smith</ARTIST>
              <COUNTRY>USA</COUNTRY>
              <COMPANY>Columbia</COMPANY>
              <PRICE>9.90</PRICE>
              <YEAR>1997</YEAR>
          </CD>
          <CD>
              <TITLE>Tupelo Honey</TITLE>
              <ARTIST>Van Morrison</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Polydor</COMPANY>
              <PRICE>8.20</PRICE>
              <YEAR>1971</YEAR>
          </CD>
          <CD>
              <TITLE>Soulsville</TITLE>
              <ARTIST>Jorn Hoel</ARTIST>
              <COUNTRY>Norway</COUNTRY>
              <COMPANY>WEA</COMPANY>
              <PRICE>7.90</PRICE>
              <YEAR>1996</YEAR>
          </CD>
          <CD>
              <TITLE>The very best of</TITLE>
              <ARTIST>Cat Stevens</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Island</COMPANY>
              <PRICE>8.90</PRICE>
              <YEAR>1990</YEAR>
          </CD>
          <CD>
              <TITLE>Stop</TITLE>
              <ARTIST>Sam Brown</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>A and M</COMPANY>
              <PRICE>8.90</PRICE>
              <YEAR>1988</YEAR>
          </CD>
          <CD>
              <TITLE>Bridge of Spies</TITLE>
              <ARTIST>T'Pau</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Siren</COMPANY>
              <PRICE>7.90</PRICE>
              <YEAR>1987</YEAR>
          </CD>
          <CD>
              <TITLE>Private Dancer</TITLE>
              <ARTIST>Tina Turner</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>Capitol</COMPANY>
              <PRICE>8.90</PRICE>
              <YEAR>1983</YEAR>
          </CD>
          <CD>
              <TITLE>Midt om natten</TITLE>
              <ARTIST>Kim Larsen</ARTIST>
              <COUNTRY>EU</COUNTRY>
              <COMPANY>Medley</COMPANY>
              <PRICE>7.80</PRICE>
              <YEAR>1983</YEAR>
          </CD>
          <CD>
              <TITLE>Pavarotti Gala Concert</TITLE>
              <ARTIST>Luciano Pavarotti</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>DECCA</COMPANY>
              <PRICE>9.90</PRICE>
              <YEAR>1991</YEAR>
          </CD>
          <CD>
              <TITLE>The dock of the bay</TITLE>
              <ARTIST>Otis Redding</ARTIST>
              <COUNTRY>USA</COUNTRY>
              <COMPANY>Atlantic</COMPANY>
              <PRICE>7.90</PRICE>
              <YEAR>1987</YEAR>
          </CD>
          <CD>
              <TITLE>Picture book</TITLE>
              <ARTIST>Simply Red</ARTIST>
              <COUNTRY>EU</COUNTRY>
              <COMPANY>Elektra</COMPANY>
              <PRICE>7.20</PRICE>
              <YEAR>1985</YEAR>
          </CD>
          <CD>
              <TITLE>Red</TITLE>
              <ARTIST>The Communards</ARTIST>
              <COUNTRY>UK</COUNTRY>
              <COMPANY>London</COMPANY>
              <PRICE>7.80</PRICE>
              <YEAR>1987</YEAR>
          </CD>
          <CD>
              <TITLE>Unchain my heart</TITLE>
              <ARTIST>Joe Cocker</ARTIST>
              <COUNTRY>USA</COUNTRY>
              <COMPANY>EMI</COMPANY>
              <PRICE>8.20</PRICE>
              <YEAR>1987</YEAR>
          </CD>
      </CATALOG>
       
      		cs



       










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