[TOC]
通过手动去除文件里面的bom实现。
/**
* 去掉UTF8 Bom头
* Remove UTF8 Bom
*
* @param string $string
* @return string
*/
function remove_utf8_Bom($string)
{
if(substr($string, 0, 3) == pack('CCC', 239, 187, 191)) return substr($string, 3);
return $string;
}
当你的php没有开启mb_string函数扩展的时候就需要自己手动去书写
/**
* 增强substr方法：支持多字节语言，比如中文。
* Enhanced substr version: support multibyte languages like Chinese.
*
* @param string $string
* @param int $length
* @param string $append
* @return string
**/
function substr($string, $length, $append = '')
{
if (strlen($string) <= $length ) $append = '';
if(function_exists('mb_substr')) return mb_substr($string, 0, $length, 'utf-8') . $append;
preg_match_all("/./su", $string, $data);
return join("", array_slice($data[0], 0, $length)) . $append;
}
/**
* 检查是否是AJAX请求
* Check is ajax request.
*
* @return bool
*/
function is_ajax()
{
$isAjax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest';
if(!$isAjax) $isAjax = (isset($_GET['HTTP_X_REQUESTED_WITH']) && $_GET['HTTP_X_REQUESTED_WITH'] == 'true');
return $isAjax;
}
/**
* 获取浏览器类型。
* Get browser.
*
* @return string
*/
function get_browser()
{
if(empty($_SERVER['HTTP_USER_AGENT'])) return 'unknow';
$agent = $_SERVER["HTTP_USER_AGENT"];
if(strpos($agent, 'MSIE') !== false || strpos($agent, 'rv:11.0'))
{
return "ie";
}
else if(strpos($agent, 'Firefox') !== false)
{
return "firefox";
}
else if(strpos($agent, 'Chrome') !== false)
{
return "chrome";
}
else if(strpos($agent, 'Opera') !== false)
{
return 'opera';
}
else if((strpos($agent, 'Chrome') == false) && strpos($agent, 'Safari') !== false)
{
return 'safari';
}
else
{
return 'unknown';
}
}
/**
* 获取浏览器版本
* Get browser version.
*
* @return string
*/
function get_browser_version()
{
if(empty($_SERVER['HTTP_USER_AGENT'])) return 'unknow';
$agent = $_SERVER['HTTP_USER_AGENT'];
if(preg_match('/MSIE\s(\d+)\..*/i', $agent, $regs))
{
return $regs[1];
}
else if(preg_match('/FireFox\/(\d+)\..*/i', $agent, $regs))
{
return $regs[1];
}
else if(preg_match('/Opera[\s|\/](\d+)\..*/i', $agent, $regs))
{
return $regs[1];
}
else if(preg_match('/Chrome\/(\d+)\..*/i', $agent, $regs))
{
return $regs[1];
}
else if((strpos($agent,'Chrome') == false) && preg_match('/Safari\/(\d+)\..*$/i', $agent, $regs))
{
return $regs[1];
}
else if(preg_match('/rv:(\d+)\..*/i', $agent, $regs))
{
return $regs[1];
}
else
{
return 'unknow';
}
}
/**
* 获取客户端操作系统
* Get client os from agent info.
*
* @return string
*/
function get_os()
{
if(empty($_SERVER['HTTP_USER_AGENT'])) return 'unknow';
$osList = array(
'/windows nt 10/i' => 'Windows 10',
'/windows nt 6.3/i' => 'Windows 8.1',
'/windows nt 6.2/i' => 'Windows 8',
'/windows nt 6.1/i' => 'Windows 7',
'/windows nt 6.0/i' => 'Windows Vista',
'/windows nt 5.2/i' => 'Windows Server 2003/XP x64',
'/windows nt 5.1/i' => 'Windows XP',
'/windows xp/i' => 'Windows XP',
'/windows nt 5.0/i' => 'Windows 2000',
'/windows me/i' => 'Windows ME',
'/win98/i' => 'Windows 98',
'/win95/i' => 'Windows 95',
'/win16/i' => 'Windows 3.11',
'/macintosh|mac os x/i' => 'Mac OS X',
'/mac_powerpc/i' => 'Mac OS 9',
'/linux/i' => 'Linux',
'/ubuntu/i' => 'Ubuntu',
'/iphone/i' => 'iPhone',
'/ipod/i' => 'iPod',
'/ipad/i' => 'iPad',
'/android/i' => 'Android',
'/blackberry/i' => 'BlackBerry',
'/webos/i' => 'Mobile'
);
foreach ($osList as $regex => $value)
{
if(preg_match($regex, $_SERVER['HTTP_USER_AGENT'])) return $value;
}
return 'unknown';
}
/**
* 检查IP是否合法。
* Check ip avaliable.
*
* @param string $ip
* @return bool
*/
function check_ip($ip)
{
$ip = trim($ip);
if(strpos($ip, '/') !== false)
{
$s = explode('/', $ip);
preg_match('/^(((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d)(\.((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d)){3})$/', $s[0], $matches);
if(!empty($matches) and $s[1] > 0 and $s[1] < 36) return true;
}
else
{
preg_match('/^(((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d)(\.((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d)){3})$/', $ip, $matches);
if(!empty($matches)) return true;
}
return false;
}
/**
* 创建随机的字符串。
* Create random string.
*
* @param int $length
* @param string $skip A-Z|a-z|0-9
* @return void
*/
function create_randomStr($length, $skip = '')
{
$str = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$skip = str_replace('A-Z', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', $skip);
$skip = str_replace('a-z', 'abcdefghijklmnopqrstuvwxyz', $skip);
$skip = str_replace('0-9', '0123456789', $skip);
for($i = 0; $i < strlen($skip); $i++)
{
$str = str_replace($skip[$i], '', $str);
}
$strlen = strlen($str);
while($length > strlen($str)) $str .= $str;
$str = str_shuffle($str);
return substr($str,0,$length);
}
mask地址的类型转换，比如255.255.255.0 => 32
/**
* 整形转字符型
* @Author Yexk
* @Date 2017-02-10
* @param {Int} $bit [数字类型：1-32]
* @return {String} [mask字符串地址]
*/
public static function maskbit2ip($bit)
{
$bit = intval($bit);
$lan = ((1<<$bit) -1)<<(32-$bit) ;
$lan = str_split(''.decbin($lan), 8);
$maskip = bindec($lan[0]).'.'.bindec($lan[1]).'.'.bindec($lan[2]).'.'.bindec($lan[3]);
return $maskip;
}
/**
* mask转整形
* @Author Yexk
* @Date 2017-02-10
* @param {String} $ip [字符型:255.255.255.0]
* @return {Int} [返回整形]
*/
public static function maskip2bit($ip)
{
$ips = explode('.',$ip);
if(!is_array($ips) || 4 != count($ips)){
return false;
}
$bit = (intval($ips[0])<<24) + (intval($ips[1])<<16) + (intval($ips[2])<<8) + intval($ips[3]);
$bit = decbin($bit);
$len = strlen($bit);
if(32 != $len){
return false;
}
$masklen = 0;
$flag = '1';
for($i=0; $i<32; $i++){
if('1'==$bit[$i]){
$masklen++;
if('1'!=$flag){
return false;
}
}
$flag=$bit[$i];
}
return $masklen;
}