PHP函数大全·持续更新 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:'.$url, false, 301); exit; }获取客户端IPfunction real_ip($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 $ip; }X_FORWARDED_FOR：之前的获取真实IP方式，极易被伪造IPX_REAL_IP：在网站使用CDN的情况下选择此项，在不使用CDN的情况下也会被伪造REMOTE_ADDR：直接获取真实请求IP，无法被伪造，但可能获取到的是CDN节点IP取中间文本function getSubstr($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']) && $_SERVER['HTTP_EWS_CUSTOME_SCHEME'] == 'https') { return true; } return false; }随机IPfunction randIp() { return mt_rand(0, 255) . '.' . mt_rand(0, 255) . '.' . mt_rand(0, 255) . '.' . mt_rand(0, 255); }毫秒时间戳function msectime() { list($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), '+/', '-_')); }