php验证手机号码(支持归属地查询及编码为UTF8)

<?php 
// 手机号验证 
function checkMobileValidity($mobilephone){ 
$exp = "/^13[0-9]{1}[0-9]{8}$|15[012356789]{1}[0-9]{8}$|18[012356789]{1}[0-9]{8}$|14[57]{1}[0-9]$/"; 
if(preg_match($exp,$mobilephone)){ 
return true; 
}else{ 
return false; 
} 
} 
// 手机号码归属地(返回: 如 广东移动) 
function checkMobilePlace($mobilephone){ 
$url = "http://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=".$mobilephone."&t=".time(); 
$content = file_get_contents($url); 
$p = substr($content, 56, 4); 
$mo = substr($content, 81, 4); 
return $str = conv2utf8($p).conv2utf8($mo); 
} 
// 转换字符串编码为 UTF8 
function conv2utf8($text){ 
return mb_convert_encoding($text,'UTF-8','ASCII,GB2312,GB18030,GBK,UTF-8'); 
}