归纳总结PHP中常用函数（附代码）

这篇文章主要讲了归纳总结PHP中常用函数，有一定的参考价值，感兴趣的朋友可以看看！

 代码如下:

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

代码如下:

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

代码如下:

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 

代码如下:

function ClearHtml($str){  
        $str = str_replace(&#39;<&#39;,&#39;<&#39;,$str);  
        $str = str_replace(&#39;>&#39;,&#39;>&#39;,$str);  
        return $str;  
}

相对路径转化成绝对路径

代码如下:

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

代码如下:

function get_all_url($code){   
        preg_match_all('/

HTML表格的每行转为CSV格式数组 

代码如下:

function get_tr_array($table) {  
        $table = preg_replace("'

将HTML表格的每行每列转为数组，采集表格数据

代码如下:

function get_td_array($table) {  
        $table = preg_replace("'

返回字符串中的所有单词 $distinct=true 去除重复

代码如下:

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];  
}

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