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使用ajax傳送post請求(切換圖片)

html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>切換圖片</title>
    <style type="text/css">
        body{
            text-align: center;
        }
        #img{
            width: 220px;
            height: 220px;
            border
: 1px solid #000
; margin: 0 auto; }
#text{ width: 220px; height: 100px; border: 1px solid #000; margin: 10px auto; }
</style> </head> <body> <h1>切換圖片</h1> <div id="img"> </div
>
<div id="text"></div> <input type="button" class='starBtn' value='海賊王' data-star='onePiece'> <input type="button" class='starBtn' value='李彥巨集' data-star='lyh'> <input type="button" class='starBtn' value='馬雲' data-star='my'> <script type="text/javascript"
>
var btns = document.querySelectorAll(".starBtn"); // 繫結事件 for(var i = 0; i <btns.length; i++){ btns[i].onclick = function(){ var ajaxObj = new XMLHttpRequest(); ajaxObj.open("post","04changeimg.php"); ajaxObj.setRequestHeader("Content-type","application/x-www-form-urlencoded"); ajaxObj.send('starName='+this.dataset['star']); ajaxObj.onreadystatechange = function(){ if(ajaxObj.readyState==4&&ajaxObj.status==200){ // console.log(ajaxObj.responseText); //擷取字串 var starArr = ajaxObj.responseText.split("|"); //console.log(starArr); document.querySelector("#img").style.background = 'url('+starArr[0]+') no-repeat center/cover '; document.querySelector("#text").innerHTML = starArr[1]; } }; }; } </script> </body> </html>

php程式碼

<?php
    header('content-type:text/html;charset=utf-8');
    $imginfo = array(
                'onePiece' => array('img/onePiece.jpg','我是要做海賊王的男人!' ),
                'lyh' => array('img/liyanhong.jpg','我是百度背後的男人!'),
                'my' => array('img/mayun.jpg','我是淘寶背後的男人!')
                );

    $key = $_POST['starName'];
    $name = $imginfo[$key];

    $pic = $name[0];
    $text = $name[1];

    echo $pic;
    // 進行分割,方便擷取字串
    echo "|";
    echo $text;

?>