用PHP實現真正的連動下拉列表

2024-05-04 21:56:48

字體：大中小

來源：轉載

供稿：網友

下面的兩個文件copy到同一個文件下，通過web路徑訪問index.html看看吧，這個是通過iframe來實現的連動更新，list.php目前的內容比較簡單，你看通過list.php來進行數據庫查詢，然后顯示出查詢的結果列表。

index.html

<body>

<form name="myfrm">

<select name="mlist" onchange="changes();">

<option value="0">請選擇...</option>

<option value="北京">北京</option>

<option value="通化">通化</option>

</select> 

<select name="slist">

</select>

<iframe id="frame" src="list.php?city=" style="display:none;"></iframe>

<script language="javascript">

function changes(){

frame.location.href = "list.php?city=" document.myfrm.mlist.value;

}

</script>

</form>

</body>

list.php

<?php

$data = array("北京"=>array("小強","旺財","小強他爹"),

"通化"=>array("小溫","小宋","他們兒子"),);

$city = $_GET["city"];

$result = $data[$city];

$str = "<script language="javascript">list = parent.document.myfrm.slist;list.length = 0;";

if($result==null)

$str .= "tmp = new Option("......", "");list.options[0] = tmp;";

else

foreach($result as $i => $value)

$str .= "tmp = new Option("{$value}", "{$value}");list.options[$i] = tmp;";

$str .= "</script>";

echo $str;

?>