php采集安装教程 Python数据采集流程 _云知道

【php采集安装教程 Python数据采集流程】本篇文章给大家带来的内容是关于php中常用的采集函数的总结（附代码），有一定的参考价值，有需要的朋友可以参考一下，希望对你有所帮助。

这几天关注了一下PHP的采集程序，才发现用PHP采集内容是这么方便，把经常用到的采集函数在这里总结一下，方便以后使用!
获取所有链接内容和地址
function getAllURL($code){
preg_match_all(‘/”‘ ]+)[“|’]?s*[^>]*>([^>]+)/i’,$code,$arr);
return array(‘name’=>$arr[2],’url’=>$arr[1]);
}
获取所有的图片地址
function getImgSrc($code){
$reg = “/]*src=https://www.jinnalai.com/fenxiang/”(http://(.+)/(.+).(jpg|gif|bmp|bnp|png))”/isU”;
preg_match_all($reg, $code, $img_array, PREG_PATTERN_ORDER);
return $img_array[1];
}
当前的脚本网址
function getSelfURL(){
if(!empty($_SERVER[“REQUEST_URI”])){
$scriptName = $_SERVER[“REQUEST_URI”];
$nowurl = $scriptName;
}else{
$scriptName = $_SERVER[“PHP_SELF”];
if(empty($_SERVER[“QUERY_STRING”])) $nowurl = $scriptName;
else $nowurl = $scriptName.”?”.$_SERVER[“QUERY_STRING”];
}
return $nowurl;
}
把全角数字转为半角数字
function getAlabNum($fnum){
$nums = array(“０”,”１”,”２”,”３”,”４”,”５”,”６”,”７”,”８”,”９”);
$fnums = “0123456789”;
for($i=0;$i<=9;$i++) $fnum = str_replace($nums[$i],$fnums[$i],$fnum);
$fnum = ereg_replace(“[^0-9.]|^0{1,}”,””,$fnum);
if($fnum==””) $fnum=0;
return $fnum;
}

去除HTML标记
function text2Html($txt){
$txt = str_replace(” “,”　”,$txt);
$txt = str_replace(“<“,”<“,$txt);
$txt = str_replace(“>”,”>”,$txt);
$txt = preg_replace(“/[rn]{1,}/isU”,”
rn”,$txt);
return $txt;
}
清除HTML标记
function clearHtml($str){
$str = str_replace(‘<‘,'<‘,$str);
$str = str_replace(‘>’,’>’,$str);
return $str;
}
相对路径转化成绝对路径
function relative2Absolute($content, $feed_url) {
preg_match(‘/(http|https|ftp):///’, $feed_url, $protocol);
$server_url = preg_replace(“/(http|https|ftp|news):///”, “”, $feed_url);
$server_url = preg_replace(“//.*/”, “”, $server_url);
if ($server_url == ”) {
return $content;
}
if (isset($protocol[0])) {
$new_content = preg_replace(‘/href=https://www.jinnalai.com/fenxiang/”//’, ‘href=”‘.$protocol[0].$server_url.’/’, $content);
$new_content = preg_replace(‘/src=https://www.jinnalai.com/fenxiang/”//’, ‘src=”‘.$protocol[0].$server_url.’/’, $new_content);
} else {
$new_content = $content;
}
return $new_content;
}
获取指定标记中的内容
function getTagData($str, $start, $end){
if ( $start == ” || $end == ” ){
return;
}
$str = explode($start, $str);
$str = explode($end, $str[1]);
return $str[0];
}

HTML表格的每行转为CSV格式数组
function getTrArray($table) {
$table = preg_replace(“‘]*?>’si”,’”‘,$table);
$table = str_replace(“”,’”,’,$table);
$table = str_replace(“”,”{tr}”,$table);
//去掉 HTML 标记
$table = preg_replace(“‘<[/!]*?[^<>]*?>’si”,””,$table);
//去掉空白字符
$table = preg_replace(“‘([rn])[s]+’”,””,$table);