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php切割页面div内容的实现代码

Jun 06, 2016 pm 08:41 PM

今天在百度知道看到一个关于php获取DIV内容的问题,做了一晚,终于是做出来了

复制代码 代码如下:
header("Content-type: text/html; charset=utf-8");
function getWebDiv($div_id,$url=false,$data=false){
if($url !== false){
$data = file_get_contents( $url );
}
$charset_pos = stripos($data,'charset');
if($charset_pos) {
if(stripos($data,'utf-8',$charset_pos)) {
$data = iconv('utf-8','utf-8',$data);
}else if(stripos($data,'gb2312',$charset_pos)) {
$data = iconv('gb2312','utf-8',$data);
}else if(stripos($data,'gbk',$charset_pos)) {
$data = iconv('gbk','utf-8',$data);
}
}
preg_match_all('/

preg_match_all('/$hit = strpos($data,$div_id);
if($hit == -1) return false; //未命中
$divs = array(); //合并所有div
foreach($pre_matches[0] as $index=>$pre_div){
$divs[(int)$pre_div[1]] = 'p';
$divs[(int)$suf_matches[0][$index][1]] = 's';
}
//对div进行排序
$sort = array_keys($divs);
asort($sort);
$count = count($pre_matches[0]);
foreach($pre_matches[0] as $index=>$pre_div){
//

if(($pre_matches[0][$index][1] $deeper = 0;
//弹出被命中div前的div
while(array_shift($sort) != $pre_matches[0][$index][1] && ($count--)) continue;
//对剩余div进行匹配,若下一个为前缀,则向下一层,$deeper加1,
//否则后退一层,$deeper减1,$deeper为0则命中匹配,计算div长度
foreach($sort as $key){
if($divs[$key] == 'p') $deeper++;
else if($deeper == 0) {
$length = $key-$pre_matches[0][$index][1];
break;
}else {
$deeper--;
}
}
$hitDivString = substr($data,$pre_matches[0][$index][1],$length).'

';
break;
}
}
return $hitDivString;
}
echo getWebDiv('id="u"','http://www.baidu.com');
//End_php

考虑到id符号问题,id="u"由用户自己填写。
声明:此段php只针对带 id div内容的读取。
作者: Zjmainstay
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