<?php
/**
* 加密解密
*
* @param string $key
* @param string $string
* @param string $decrypt
* @return string
*/
function encryptDecrypt($key, $string, $decrypt)
{
if($decrypt){
$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), "12");
return $decrypted;
}else{
$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key))));
return $encrypted;
}
}
function generateRandomString($length = 10)
{
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$randomString = '';
for ($i = 0; $i < $length; $i++) {
$randomString .= $characters[rand(0, strlen($characters) - 1)];
}
return $randomString;
}
/**
* 获取扩展名
* @param string $filename
* @return string
*/
function getExtension($filename)
{
$ext = substr($filename, strrpos($filename, '.'));
return str_replace('.','',$ext);
}
function formatSize($size)
{
$sizes = array(" Bytes", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB");
if ($size == 0) {
return('n/a');
} else {
return (round($size/pow(1024, ($i = floor(log($size, 1024)))), 2) . $sizes[$i]);
}
}
function stringParser($string,$replacer)
{
$result = str_replace(array_keys($replacer), array_values($replacer),$string);
return $result;
}
function listDirFiles($DirPath)
{
if($dir = opendir($DirPath)){
while(($file = readdir($dir))!== false){
if(!is_dir($DirPath.$file)) {
echo "filename: $file<br />";
}
}
}
}
function curPageURL()
{
$pageURL = 'http';
if (!empty($_SERVER['HTTPS'])) {$pageURL .= "s";}
$pageURL .= "://";
if ($_SERVER["SERVER_PORT"] != "80") {
$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
} else {
$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}
return $pageURL;
}
function download($filename)
{
if ((isset($filename))&&(file_exists($filename))){
header("Content-length: ".filesize($filename));
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . $filename . '"');
readfile("$filename");
} else {
echo "Looks like file does not exist!";
}
}
/**
* 获取IP地址
*
* @return string
*/
function getIp()
{
if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")){
$ip = getenv("HTTP_CLIENT_IP");
}elseif (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")){
$ip = getenv("HTTP_X_FORWARDED_FOR");
}elseif (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")){
$ip = getenv("REMOTE_ADDR");
}elseif (isset ($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")){
$ip = $_SERVER['REMOTE_ADDR'];
}else
$ip = "unknown";
return ($ip);
}
function injCheck($sql_str)
{
$check = preg_match('/select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile/', $sql_str);
if ($check) {
echo 'Illegal char';
exit;
} else {
return $sql_str;
}
}
/**
* 是否是手机号码
*
* @param string $phone 手机号码
* @return boolean
*/
function isPhone($phone) {
if (strlen ( $phone ) != 11 || ! preg_match ( '/^1[3|4|5|8][0-9]\d{4,8}$/', $phone )) {
return false;
} else {
return true;
}
}
/**
* 验证字符串是否为数字,字母,中文和下划线构成
* @param string $username
* @return bool
*/
function isString($str){
if(preg_match('/^[\x{4e00}-\x{9fa5}\w_]+$/u',$str)){
return true;
}else{
return false;
}
}
/**
* 是否为一个合法的email
* @param sting $email
* @return boolean
*/
function isEmail($email){
if (filter_var ($email, FILTER_VALIDATE_EMAIL )) {
return true;
} else {
return false;
}
}
/**
* 是否为一个合法的url
* @param string $url
* @return boolean
*/
function isUrl($url){
if (filter_var ($url, FILTER_VALIDATE_URL )) {
return true;
} else {
return false;
}
}
/**
* 是否为一个合法的ip地址
* @param string $ip
* @return boolean
*/
function isIp($ip){
if (ip2long($ip)) {
return true;
} else {
return false;
}
}
/**
* 是否为整数
* @param int $number
* @return boolean
*/
function isNnumber($number){
if(preg_match('/^[-\+]?\d+$/',$number)){
return true;
}else{
return false;
}
}
/**
* 是否为正整数
* @param int $number
* @return boolean
*/
function isPositiveNumber($number){
if(ctype_digit ($number)){
return true;
}else{
return false;
}
}
/**
* 是否为小数
* @param float $number
* @return boolean
*/
function isDecimal($number){
if(preg_match('/^[-\+]?\d+(\.\d+)?$/',$number)){
return true;
}else{
return false;
}
}
/**
* 是否为正小数
* @param float $number
* @return boolean
*/
function isPositiveDecimal($number){
if(preg_match('/^\d+(\.\d+)?$/',$number)){
return true;
}else{
return false;
}
}
/**
* 是否为英文
* @param string $str
* @return boolean
*/
function isEnglish($str){
if(ctype_alpha($str))
return true;
else
return false;
}
/**
* 是否为中文
* @param string $str
* @return boolean
*/
function isChinese($str){
if(preg_match('/^[\x{4e00}-\x{9fa5}]+$/u',$str))
return true;
else
return false;
}
/**
* 判断是否为图片
* @param string $file 图片文件路径
* @return boolean
*/
function isImage($file){
if(file_exists($file) && getimagesize($file===false)){
return false;
}else{
return true;
}
}
/**
* 是否为合法的身份证(支持15位和18位)
* @param string $card
* @return boolean
*/
function isCard($card){
if(preg_match('/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$/',$card)
||preg_match('/^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{4}$/'
,$card))
return true;
else
return false;
}
/**
* 验证日期格式是否正确
* @param string $date
* @param string $format
* @return boolean
*/
function isDate($date,$format='Y-m-d'){
$t=date_parse_from_format($format,$date);
if(empty($t['errors'])){
return true;
}else{
return false;
}
}
