zoukankan      html  css  js  c++  java
  • PHP采集程序中常用的函数

     

    //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);
            $txt = str_replace("<","&lt;",$txt);
            $txt = str_replace(">","&gt;",$txt);
            $txt = preg_replace("/[\r\n]{1,}/isU","<br/>\r\n",$txt);
            return $txt;
    }

    //清除HTML标记
    function ClearHtml($str){
            $str = str_replace('<','&lt;',$str);
            $str = str_replace('>','&gt;',$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]);
    }

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

  • 相关阅读:
    可空类型转换为不可空的普通类型
    如何使用AspNetPager分页控件和ObjectDataSource控件进行分页
    TFS映射后丢失引用的问题
    (很好用)JS时间控件实现日期的多选
    取两个日期之间的非工作日的天数(指的是周六、周日)
    在日期格式化的时候提示错误:Tostring没有采用一个参数的重载
    Linq返回的集合类型不是已有的表格类型时的写法(谨记:列表的时候用)
    系统缓存全解析6:数据库缓存依赖
    实现文本框动态限制字数的实现(好方法)
    实现GridView内容循环滚动
  • 原文地址:https://www.cnblogs.com/tdalcn/p/2279539.html
Copyright © 2011-2022 走看看