实用函数3

//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($code){   
        preg_match_all('/<a\s+href=["|\']?([^>"\' ]+)["|\']?\s*[^>]*>([^>]+)<\/a>/i',$code,$arr);   
        return array('name'=>$arr[2],'url'=>$arr[1]);   
} 

//HTML表格的每行转为CSV格式数组 

function get_tr_array($table) {  
        $table = preg_replace("'<td[^>]*?>'si",'"',$table);  
        $table = str_replace("</td>",'",',$table);  
        $table = str_replace("</tr>","{tr}",$table);  
function get_tr_array($table) {  
        $table = preg_replace("'<td[^>]*?>'si",'"',$table);  
        $table = str_replace("</td>",'",',$table);  
        $table = str_replace("</tr>","{tr}",$table);  
        //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); 
        $table = str_replace(" ","",$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) {  
        $table = preg_replace("'<table[^>]*?>'si","",$table);  
        $table = preg_replace("'<tr[^>]*?>'si","",$table);  
        $table = preg_replace("'<td[^>]*?>'si","",$table);  
        $table = str_replace("</tr>","{tr}",$table);  
        $table = str_replace("</td>","{td}",$table);  
        //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);  
        $table = str_replace(" ","",$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];  
}