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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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