PHP 采集程序中常用的函数

代码如下:

//获得当前的脚本网址
function get_PHP_url()
{
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);
$txt = preg_replace(”/[\r\n]{1,}/isU”,”
\r\n”,$txt);
return $txt;
} //清除HTML标记
function ClearHtml($str)
{
$str = str_replace('<','<',$str);
$str = str_replace('>','>',$str);
return $str;
} //相对路径转化成绝对路径
function relative_to_absolute($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]))
{
$new_content = preg_replace('/href=”\//',‘href=”‘.$protocol[0].$server_url.'/',$content);
$new_content = preg_replace('/src=”\//','src=”‘.$protocol[0].$server_url.'/',$new_content);
}
else
{
$new_content = $content;
}
return $new_content;
}
//取得所有链接
function get_all_url($code){
preg_match_all('/”\' ]+)[”|\']?\s*[^>]*>([^>]+)<\/a>/i',$code,$arr);
return array('name'=>$arr[2],'url'=>$arr[1]);
} //获取指定标记中的内容
function get_tag_data($str,$start,$end)
{
if ( $start == ” || $end == ” )
{
return;
}
$str = explode($start,$str);
$str = explode($end,$str[1]);
return $str[0];
} //HTML表格的每行转为CSV格式数组
function get_tr_array($table)
{
$table = preg_replace(”‘]*?>'si”,'”‘,$table);
$table = str_replace(”$table = str_replace(”//去掉 HTML 标记
$table = preg_replace(”‘<[\/\!]*?[^<>]*?>'si”,$table);
//去掉空白字符
$table = preg_replace(”‘([\r\n])[\s]+'”,$table);
$table = str_replace(” “,$table);
$table = explode(”,{tr}”,$table);
array_pop($table);
return $table;
} //将HTML表格的每行每列转为数组，采集表格数据
function get_td_array($table)
{
$table = preg_replace(”‘]*?>'si”,$table);
$table = preg_replace(”‘]*?>'si”,$table);
$table = preg_replace(”‘]*?>'si”,”{td}”,$table); $table = explode('{tr}',$table);
array_pop($table);
foreach ($table as $key=>$tr)
{
$td = explode('{td}',$tr);
array_pop($td);
$td_array[] = $td;
}
return $td_array;
} //返回字符串中的所有单词 $distinct=true 去除重复
function split_en_str($str,$distinct=true)
{
preg_match_all('/([a-zA-Z]+)/',$str,$match);
if ($distinct == true)
{
$match[1] = array_unique($match[1]);
}
sort($match[1]);
return $match[1];
}

原文地址：https://www.jb51.cc/php/28898.html