html联动的实现
html内容：<html><head><meta http-equiv="Content-Type" content="text/html; charset=GBK" /><title>无标题文档</title><script language="javascript">function initSelect(){var option1 = new Option("福建", "福建");var option2 = new Option("陕西", "陕西");document.getElementById("province").options.length = 1;document.getElementById("province").options.add(option1);document.getElementById("province").options.add(option2);}function changeProvince(){var pro = document.getElementById("province").value;switch(pro){case "福建":var option0 = new Option("--请选择--", "");var option1 = new Option("福州", "福州");var option2 = new Option("厦门", "厦门");var option3 = new Option("泉州", "泉州");break;case "陕西":var option0 = new Option("--请选择--", "");var option1 = new Option("西安", "西安");var option2 = new Option("宝鸡", "宝鸡");var option3 = new Option("咸阳", "咸阳");break;}document.getElementById("city").options.length = 0;document.getElementById("city").options.add(option0);document.getElementById("city").options.add(option1);document.getElementById("city").options.add(option2);document.getElementById("city").options.add(option3);}</script></head><body ><table width="200" border="0" cellspacing="0" cellpadding="10" ><tr><td><select name="province" id="province" onChange="changeProvince()"><option value="">--请选择--</option></select>省</td><td><select name="city" ><option value="">--请选择--</option></select>市</td></tr></table></body></html> 正则匹配HTML内容
//header('Content-Type:text/html;chaset=utf-8;');$str = file_get_contents("http://www.myip.cn/ename.cn");//$str = "<td class='td_bold'>IP所在地:</td><td id='res_iplocation_0'>广东省中山市 电信<br><img width=18 border=0";preg_match("/IP所在地:<\/td><td id=\'res_iplocation_0\'>([".chr(0xa1)."-".chr(0xff)."\s]+)<br>/si", $str, $matches);//preg_match("/res_iplocation_0[\'\"\s]*>(.*?)<br>/si", $str, $matches);print_r($matches);
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