php 函数

函数

♪(･ω･)ﾉ

整理了一下最近常用到的函数。

字符串相关

br2nl

JS 版

function br2nl(txt){
    var re=/(<br\/>|<br>|<BR>|<BR\/>)/g;
    var s=txt.replace(re,"\n\n");
    return s;
}

PHP 版

function br2nl($text) {      
    return preg_replace('/<br\\s*?\/??>/i', '', $text);     
} 

msubstr

function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true) {
    if(function_exists("mb_substr"))
        $slice = mb_substr($str, $start, $length, $charset);
    elseif(function_exists('iconv_substr')) {
        $slice = iconv_substr($str,$start,$length,$charset);
        if(false === $slice) {
            $slice = '';
        }
    }else{
        $re['utf-8']   = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
        $re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
        $re['gbk']    = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
        $re['big5']   = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
        preg_match_all($re[$charset], $str, $match);
        $slice = join("",array_slice($match[0], $start, $length));
    }
    if(utf8_strlen($str) < $length) $suffix = false;
    return $suffix ? $slice.'...' : $slice;
}

utf8_strlen

function utf8_strlen($string = null) {
    preg_match_all("/./us", $string, $match);
    return count($match[0]);
}

文件与目录相关

递归删除目录

PHP

function deldir($dir) {
    $dh = opendir($dir);
    while ($file = readdir($dh)) {
        if ($file != "." && $file != "..") {
            $fullpath = $dir . "/" . $file;
            if (!is_dir($fullpath)) {
                @unlink($fullpath);
            } else {
                @deldir($fullpath);
            }
        }
    }
    closedir($dh);
}

getDateTime

function getDateTime($model){        
    $user = M('User')->where('role_id = %d',session('role_id'))->field('user_id,last_read_time')->find();        
    if($user['last_read_time']){
        $last_read_time = json_decode($user['last_read_time'],true);            
    }
    $last_read_time[$model] = time();    
    $last_read_time = json_encode($last_read_time);        
    M('User')->where('user_id = %d',$user['user_id'])->setField('last_read_time',$last_read_time);
    return true;
}

正则、验证相关

isMobile

function isMobile(){

    $user_agent = $_SERVER['HTTP_USER_AGENT'];

    $mobile_agents = Array("240x320","acer","acoon","acs-","abacho","ahong","airness","alcatel","amoi","android","anywhereyougo.com","applewebkit/525","applewebkit/532","asus","audio","au-mic","avantogo","becker","benq","bilbo","bird","blackberry","blazer","bleu","cdm-","compal","coolpad","danger","dbtel","dopod","elaine","eric","etouch","fly ","fly_","fly-","go.web","goodaccess","gradiente","grundig","haier","hedy","hitachi","htc","huawei","hutchison","inno","ipad","ipaq","ipod","jbrowser","kddi","kgt","kwc","lenovo","lg ","lg2","lg3","lg4","lg5","lg7","lg8","lg9","lg-","lge-","lge9","longcos","maemo","mercator","meridian","micromax","midp","mini","mitsu","mmm","mmp","mobi","mot-","moto","nec-","netfront","newgen","nexian","nf-browser","nintendo","nitro","nokia","nook","novarra","obigo","palm","panasonic","pantech","philips","phone","pg-","playstation","pocket","pt-","qc-","qtek","rover","sagem","sama","samu","sanyo","samsung","sch-","scooter","sec-","sendo","sgh-","sharp","siemens","sie-","softbank","sony","spice","sprint","spv","symbian","tablet","talkabout","tcl-","teleca","telit","tianyu","tim-","toshiba","tsm","up.browser","utec","utstar","verykool","virgin","vk-","voda","voxtel","vx","wap","wellco","wig browser","wii","windows ce","wireless","xda","xde","zte");

    $is_mobile = false;

    foreach ($mobile_agents as $device) {
        if (stristr($user_agent, $device)) {
            $is_mobile = true;
            break;
        }
    }

    return $is_mobile;
}

is_utf8

function is_utf8($liehuo_net){
    if (preg_match("/^([".chr(228)."-".chr(233)."]{1}[".chr(128)."-".chr(191)."]{1}[".chr(128)."-".chr(191)."]{1}){1}/",$liehuo_net) == true || preg_match("/([".chr(228)."-".chr(233)."]{1}[".chr(128)."-".chr(191)."]{1}[".chr(128)."-".chr(191)."]{1}){1}$/",$liehuo_net) == true || preg_match("/([".chr(228)."-".chr(233)."]{1}[".chr(128)."-".chr(191)."]{1}[".chr(128)."-".chr(191)."]{1}){2,}/",$liehuo_net) == true) 
    {
        return true; 
    }
    else 
    { 
        return false; 
    }
}

判断目录是否可写

//判断目录是否可写
function check_dir_iswritable($dir_path){
    $dir_path=str_replace('\\','/',$dir_path);
    $is_writale=1;
    if(!is_dir($dir_path)){
        $is_writale=0;
        return $is_writale;
    }else{
        $file_hd=@fopen($dir_path.'/test.txt','w');
        if(!$file_hd){
            @fclose($file_hd);
            @unlink($dir_path.'/test.txt');
            $is_writale=0;
            return $is_writale;
        }
        @fclose($file_hd);
        @unlink($dir_path.'/test.txt');
        $dir_hd=opendir($dir_path);
        while(false!==($file=readdir($dir_hd))){
            if ($file != "." && $file != "..") {
                if(is_file($dir_path.'/'.$file)){
                    //文件不可写，直接返回
                    if(!is_writable($dir_path.'/'.$file)){
                        return 0;
                    } 
                }else{
                    $file_hd2=@fopen($dir_path.'/'.$file.'/test.txt','w');
                    if(!$file_hd2){
                        @fclose($file_hd2);
                        @unlink($dir_path.'/'.$file.'/test.txt');
                        $is_writale=0;
                        return $is_writale;
                    }
                    @unlink($dir_path.'/test.txt');
                    //递归
                    $is_writale=check_dir_iswritable($dir_path.'/'.$file);
                }
            }
        }
    }
return $is_writale;
}

isAjaxRequest

function isAjaxRequest() {
    if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) ) {
        if('xmlhttprequest' == strtolower($_SERVER['HTTP_X_REQUESTED_WITH'])){
            return true;
        }    
    }
    if(!empty($_POST['ajax']) || !empty($_GET['ajax'])){
        // 判断Ajax方式提交
        return true;
    }
    return false;
}

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最后编辑时间为: Feb 17, 2018 at 04:30 pm