PHP常用采集函数总结

1、获取所有链接内容和地址

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

2、获取所有的图片地址

function getImgSrc($code){
　　$reg="/]*src="(http://(.+)/(.+).(jpg|gif|bmp|bnp|png))"/isU";
　　preg_match_all($reg,$code,$img_array,PREG_PATTERN_ORDER);
　　return $img_array[1];
}

3、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;
}

4、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;
}

5、去除HTML标记

function text2Html($txt){
    $txt = str_replace(" ","　",$txt);
    $txt = str_replace("<","<",$txt);
    $txt = str_replace(">",">",$txt);
    $txt = preg_replace("/[ ]{1,}/isU","<br/> ",$txt);
    return $txt;
}

6、清除HTML标记

function clearHtml($str){
    $str = str_replace('<','<',$str);
    $str = str_replace('>','>',$str);
    return $str;
}

7、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])) {
        $new_content=preg_replace('/href="//', 'href="'.$protocol[0].$server_url.'/', $content);
        $new_content=preg_replace('/src="//', 'src="'.$protocol[0].$server_url.'/', $new_content);
    } else {
        $new_content = $content;
    }
    return $new_content;
}

8、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];
}

9、HTML表格的每行转为CSV格式数组

function getTrArray($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
    $table = preg_replace("'([ ])[s]+'","",$table);
    $table = str_replace(" ","",$table);
    $table = str_replace(" ","",$table);
    $table = explode(",{tr}",$table);
    array_pop($table);
    return $table;
}

10、将HTML表格的每行每列转为数组，采集表格数据

function getTdArray($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
    $table = preg_replace("'([ ])[s]+'","",$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;
}

11、返回字符串中的所有单词 $distinct=true 去除重复

function splitEnStr($str,$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];
}