邮箱验证
function is_valid_email($email) {
if (preg_match('/^[\w\-\.]+@[\w\-\.]+(\.\w+)+$/', $email)) {
return true;
} else {
return false;
}
}
OR
function check_email($email)
{
$result = trim($email);
if (filter_var($result, FILTER_VALIDATE_EMAIL)) {
return true;
} else {
return false;
}
}301跳转
function redirect($url) {
header('location:'.$url, false, 301);
exit;
}获取客户端IP
function real_ip($type = 0)
{
$ip = $_SERVER['REMOTE_ADDR'];
if ($type <= 0 && isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
foreach ($matches[0] as $xip) {
if (filter_var($xip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
$ip = $xip;
break;
}
}
} elseif ($type <= 0 && isset($_SERVER['HTTP_CLIENT_IP']) && filter_var($_SERVER['HTTP_CLIENT_IP'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif ($type <= 1 && isset($_SERVER['HTTP_CF_CONNECTING_IP']) && filter_var($_SERVER['HTTP_CF_CONNECTING_IP'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
$ip = $_SERVER['HTTP_CF_CONNECTING_IP'];
} elseif ($type <= 1 && isset($_SERVER['HTTP_X_REAL_IP']) && filter_var($_SERVER['HTTP_X_REAL_IP'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
$ip = $_SERVER['HTTP_X_REAL_IP'];
}
return $ip;
}X_FORWARDED_FOR：之前的获取真实IP方式，极易被伪造IP
X_REAL_IP：在网站使用CDN的情况下选择此项，在不使用CDN的情况下也会被伪造
REMOTE_ADDR：直接获取真实请求IP，无法被伪造，但可能获取到的是CDN节点IP
取中间文本
function getSubstr($str, $leftStr, $rightStr)
{
$left = strpos($str, $leftStr);
$right = strpos($str, $rightStr, $left);
if ($left < 0) return '';
if ($right > 0) {
return substr($str, $left + strlen($leftStr), $right - $left - strlen($leftStr));
} else {
return substr($str, $left + strlen($leftStr));
}
}是否HTTPS访问
function is_https()
{
if (isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == 443) {
return true;
} elseif (isset($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) == 'on' || $server['HTTPS'] == '1')) {
return true;
} elseif (isset($_SERVER['HTTP_X_CLIENT_SCHEME']) && $_SERVER['HTTP_X_CLIENT_SCHEME'] == 'https') {
return true;
} elseif (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {
return true;
} elseif (isset($_SERVER['REQUEST_SCHEME']) && $_SERVER['REQUEST_SCHEME'] == 'https') {
return true;
} elseif (isset($_SERVER['HTTP_EWS_CUSTOME_SCHEME']) && $_SERVER['HTTP_EWS_CUSTOME_SCHEME'] == 'https') {
return true;
}
return false;
}随机IP
function randIp()
{
return mt_rand(0, 255) . '.' . mt_rand(0, 255) . '.' . mt_rand(0, 255) . '.' . mt_rand(0, 255);
}毫秒时间戳
function msectime() {
list($msec, $sec) = explode(' ', microtime());
return (float)sprintf('%.0f', (floatval($msec) + floatval($sec)) * 1000);
}获取重定向地址
function getrealurl($url){
@$header = get_headers($url,1);
if (strpos($header[0],'301') || strpos($header[0],'302')) {
if(is_array($header['Location'])) {
return $header['Location'][count($header['Location'])-1];
}else{
return $header['Location'];
}
}else {
return $url;
}
}jsonp转数组
function jsonp_decode($jsonp, $assoc = false)
{
$jsonp = trim($jsonp);
if (isset($jsonp[0]) && $jsonp[0] !== '[' && $jsonp[0] !== '{') {
$begin = strpos($jsonp, '(');
if (false !== $begin) {
$end = strrpos($jsonp, ')');
if (false !== $end) {
$jsonp = substr($jsonp, $begin + 1, $end - $begin - 1);
}
}
}
return json_decode($jsonp, $assoc);
}秒数转换详细时间
/**
* 将秒数转换为剩余详细时间！
*/
function Sec2Time($time)
{
if (is_numeric($time)) {
$value = array(
"years" => 0, "days" => 0, "hours" => 0,
"minutes" => 0, "seconds" => 0,
);
if ($time >= 31556926) {
$value["years"] = floor($time / 31556926);
$time = ($time % 31556926);
}
if ($time >= 86400) {
$value["days"] = floor($time / 86400);
$time = ($time % 86400);
}
if ($time >= 3600) {
$value["hours"] = floor($time / 3600);
$time = ($time % 3600);
}
if ($time >= 60) {
$value["minutes"] = floor($time / 60);
$time = ($time % 60);
}
$value["seconds"] = floor($time);
$t = ($value["years"] >= 1 ? $value["years"] . "年" : '') . ($value["days"] >= 1 ? $value["days"] . "天" : '') . ($value["hours"] >= 1 ? $value["hours"] . "小时" : '') . ($value["minutes"] >= 1 ? $value["minutes"] . "分" : '') . ($value["seconds"] >= 1 ? $value["seconds"] . "秒" : '');
return (!empty($t) ? $t : '0秒');
} else {
return (bool) FALSE;
}
}时间相差秒数
/**
* @param $startdate 开始时间
* @param int $enddate 结束时间
* 返回两者之间相差多少秒
*/
function TimeLag($startdate, $enddate = -1)
{
global $date;
$enddate = ($enddate == -1 ? $date : $enddate);
$time = strtotime($enddate) - strtotime($startdate); //和结束时间的时间戳
$text = '';
$dater = floor(($time) / 86400);
if ($dater > 0) {
$time = $time - ($dater * 86400);
$text .= $dater . '天';
}
$hour = floor(($time) / 3600);
if ($hour > 0) {
$time = $time - ($hour * 3600);
$text .= $hour . '小时';
}
$minute = floor(($time) / 60);
$time = $time - ($minute * 60);
if ($minute > 0) {
$text .= $minute . '分钟';
}
$second = floor(($time) % 60);
if ($second > 0) {
$text .= $second . '秒';
}
return $text;
}生成唯一token参数
/**
* @param $vals 混淆函数
* 生成唯一token参数！
*/
function TokenCreate($vals = '1')
{
$key = mt_rand();
$hash = hash_hmac("sha1", $vals . mt_rand() . time(), $key, true);
return str_replace(['=', '_', '-'], '', strtr(base64_encode($hash), '+/', '-_'));
}
Last modification：December 14, 2023
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