PHP, JavaScript hidden phone number function

Php:
A. Code:

/** @desc：隐藏手机号* @param：tel 手机号，如：13987654321* @param：num 隐藏的位数，默认4位* @return ret 回显的手机号，如：139xxxx4321*/function hidetel($tel,$num = 4){$len = mb_strlen($tel);$start = floor(($len - $num) / 2);$end = ceil(($len - $num) / 2);$head = mb_substr($tel,0,$start);$body = str_repeat(‘x‘,$num);$foot = mb_substr($tel,($start + $num),$end);$ret = $head.‘‘.$body.‘‘.$foot;return $ret;}

B. Testing:

$ret = hidetel(13987654321);var_dump($ret);

C. Output:

string(11) "139xxxx4321"

Javascript:
A. Code:

/** @desc：隐藏手机号* @param：tel 手机号，如：13987654321* @param：num 隐藏的位数，默认4位* @return ret 回显的手机号，如：139xxxx4321*/function hidetel(tel,num = 4){tel = tel.toString()var len = tel.lengthvar start = Math.floor((len - num) / 2)var end = Math.ceil((len - num) / 2)var head = tel.slice(0,start)var arr = new Array(num + 1)var body = arr.join(‘x‘)var foot = tel.slice((start + num),len)var ret = head+‘‘+body+‘‘+footreturn ret}

B. Testing:

var ret = hidetel(13987654321)console.log(ret)

C. Output:

139xxxx4321

PHP, JavaScript hidden phone number function