函数总结：
1、加密解密
//加密解密
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 $encrypted;
}
}
2、生成随机字符串
//生成随机字符串
function generateRandomString($length = 10) {
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$randomString = '';
for ($i = 0; $i < $length; $i++) {
$randomString .= $characters[rand(0, strlen($characters) - 1)];
}
return $randomString;
}
3、生成随机字符串方法二
//生成随机字符串方法二
function generateRandomString($length = 10) {
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$randomString = '';
$randomString = substr(str_shuffle($str),0,$length);
return $randomString;
}
4、获取文件扩展名
//获取文件扩展名
function getExtension($filename){
$myext = substr($filename, strrpos($filename, '.'));
return str_replace('.','',$myext);
}
5、获取文件大小并格式化
//获取文件大小并格式化
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]);
}
}
6、PHP替换标签字符
//PHP替换标签字符
function stringParser($string,$replacer){
$result = str_replace(array_keys($replacer), array_values($replacer),$string);
return $result;
}
7、列出目录下的文件
function listFiles($dir) {
//打开目录
$handle = opendir($dir);
//阅读目录
while (false != ($file = readdir($handle))) {
//列出所有文件并去掉'.'和'..'
if ($file != '.' && $file != '..') {
//所得到的文件名是否仍然是一个目录
if (is_dir("$dir/$file")) {
//列出目录下的文件
listFiles("$dir/$file");
} else {
//文件夹下面是文件，则直接显示
echo "$dir/$file<br>";
}
}
}
}8、获取当前页面的url
//获取当前页面的url
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 $pageURL;
}
9、强制下载
//强制下载
function download($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!";
}
}
10、汉字截取函数
/*
Utf-8、gb2312都支持的汉字截取函数
cut_str(字符串, 截取长度, 开始长度, 编码);
编码默认为 utf-8
开始长度默认为 0
*/
function cutStr($string, $sublen, $start = 0, $code = 'UTF-8'){
if($code == 'UTF-8'){
$pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
preg_match_all($pa, $string, $t_string);
if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen))."...";
return join('', array_slice($t_string[0], $start, $sublen));
}else{
$start = $start*2;
$sublen = $sublen*2;
$strlen = strlen($string);
$tmpstr = '';
for($i=0; $i<$strlen; $i++){
if($i>=$start && $i<($start+$sublen)){
if(ord(substr($string, $i, 1))>129){
$tmpstr.= substr($string, $i, 2);
}else{
$tmpstr.= substr($string, $i, 1);
}
}
if(ord(substr($string, $i, 1))>129) $i++;
}
if(strlen($tmpstr)<$strlen ) $tmpstr.= "...";
return $tmpstr;
}
}
11、获取用户真实IP
//获取用户真实IP
function getIp() {
if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
$ip = getenv("HTTP_CLIENT_IP");
else
if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
$ip = getenv("HTTP_X_FORWARDED_FOR");
else
if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
$ip = getenv("REMOTE_ADDR");
else
if (isset ($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
$ip = $_SERVER['REMOTE_ADDR'];
else
$ip = "unknown";
return ($ip);
}
12、防止注入
//防止注入
function injCheck($sql_str) {
$check = preg_match('/select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile/', $sql_str);
if ($check) {
echo '非法字符！！'.$sql_str;
exit;
} else {
return $sql_str;
}
}
13、页面提示跳转
//页面提示跳转
function message($msgTitle,$message,$jumpUrl){
$str = '<!DOCTYPE HTML>';
$str .= '<html>';
$str .= '<head>';
$str .= '<meta charset="utf-8">';
$str .= '<title>页面提示</title>';
$str .= '<style type="text/css">';
$str .= '*{margin:0; padding:0}a{color:#369; text-decoration:none;}a:hover{text-decoration:underline}body{height:100%; font:12px/18px Tahoma, Arial, sans-serif; color:#424242; background:#fff}.message{width:450px; height:120px; margin:16% auto; border:1px solid #99b1c4; background:#ecf7fb}.message h3{height:28px; line-height:28px; background:#2c91c6; text-align:center; color:#fff; font-size:14px}.msg_txt{padding:10px; margin-top:8px}.msg_txt h4{line-height:26px; font-size:14px}.msg_txt h4.red{color:#f30}.msg_txt p{line-height:22px}';
$str .= '</style>';
$str .= '</head>';
$str .= '<body>';
$str .= '<div class="message">';
$str .= '<h3>'.$msgTitle.'</h3>';
$str .= '<div class="msg_txt">';
$str .= '<h4 class="red">'.$message.'</h4>';
$str .= '<p>系统将在 <span style="color:blue;font-weight:bold">3</span> 秒后自动跳转,如果不想等待,直接点击 <a href="{$jumpUrl}">这里</a> 跳转</p>';
$str .= "<script>setTimeout('location.replace(\'".$jumpUrl."\')',2000)</script>";
$str .= '</div>';
$str .= '</div>';
$str .= '</body>';
$str .= '</html>';
echo $str;
}
14、时间长度转换
//时间长度转换
function changeTimeType($seconds) {
if ($seconds > 3600) {
$hours = intval($seconds / 3600);
$minutes = $seconds % 3600;
$time = $hours . ":" . gmstrftime('%M:%S', $minutes);
} else {
$time = gmstrftime('%H:%M:%S', $seconds);
}
return $time;
}
15、post发送数据
function http_send_data($url,$data='',$do='post'){
$ch = curl_init();//初始化
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
if($do=='post'){
curl_setopt($ch,CURLOPT_POST,true);
curl_setopt($ch,CURLOPT_POSTFIELDS,$data);
}
$output = curl_exec($ch);
curl_close($ch);
return $output;
}function do_post_request($url, $data, $optional_headers = null)
{
$params = array('http' => array(
'method' => 'POST',
'content' => $data
));
if ($optional_headers !== null) {
$params['http']['header'] = $optional_headers;
}
$ctx = stream_context_create($params);
$fp = @fopen($url, 'rb', false, $ctx);
if (!$fp) {
throw new Exception("Problem with $url, $php_errormsg");
}
$response = @stream_get_contents($fp);
if ($response === false) {
throw new Exception("Problem reading data from $url, $php_errormsg");
}
return $response;
}
16、CURL获取数据
function curl_file_get_contents($durl){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $durl);
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
curl_setopt($ch, CURLOPT_USERAGENT, _USERAGENT_);
curl_setopt($ch, CURLOPT_REFERER,_REFERER_);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$r = curl_exec($ch);
curl_close($ch);
return $r;
}
17、根据地球两点经纬度计算距离的两个函数
//根据两个经纬度数据判断两点距离
function GetDistance($lat_a, $lng_a, $lat_b, $lng_b) {
//R是地球半径（米）
$R = 6378137;
$pk = doubleval（180 / 3.1415926535898);
$a1 = doubleval（$lat_a / $pk);
$a2 = doubleval（$lng_a / $pk);
$b1 = doubleval（$lat_b / $pk);
$b2 = doubleval（$lng_b / $pk);
$t1 = doubleval（cos($a1) * cos($a2) * cos($b1) * cos($b2));
$t2 = doubleval（cos($a1) * sin($a2) * cos($b1) * sin($b2));
$t3 = doubleval（sin($a1) * sin($b1));
$tt = doubleval（acos($t1 + $t2 + $t3));
$s=round($R * $tt);
if($s>=3000) $s=(string)($s/1000).'公里'; else $s=$s.'米';
return $s;
}
/**
* 根据起点坐标和终点坐标测距离
* @param [array] $from [起点坐标(经纬度),例如:array(118.012951,36.810024)]
* @param [array] $to [终点坐标(经纬度)]
* @param [bool] $km 是否以公里为单位 false:米 true:公里(千米)
* @param [int] $decimal 精度 保留小数位数
* @return [string] 距离数值
*/
function get_distance($from,$to,$km=true,$decimal=2){
sort($from);
sort($to);
$EARTH_RADIUS = 6370.996; // 地球半径系数
$distance = $EARTH_RADIUS*2*asin(sqrt(pow(sin( ($from[0]*pi()/180-$to[0]*pi()/180)/2),2)+cos($from[0]*pi()/180)*cos($to[0]*pi()/180)* pow(sin( ($from[1]*pi()/180-$to[1]*pi()/180)/2),2)))*1000;
if($km){
$distance = $distance / 1000;
}
return round($distance, $decimal);
}
function getDistance($lat1, $lng1, $lat2, $lng2) {
$earthRadius = 6367000;
$lat1 = ($lat1 * pi() ) / 180;
$lng1 = ($lng1 * pi() ) / 180;
$lat2 = ($lat2 * pi() ) / 180;
$lng2 = ($lng2 * pi() ) / 180;
$calcLongitude = $lng2 - $lng1;
$calcLatitude = $lat2 - $lat1;
$stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
$stepTwo = 2 * asin(min(1, sqrt($stepOne)));
$calculatedDistance = $earthRadius * $stepTwo;
return round($calculatedDistance);
}
18、获取当前环境下php所有扩展及函数
$ext_info = array();
$loaded_extensions = get_loaded_extensions(); //获取已加载的扩展
foreach ($loaded_extensions as $ext) {
$funs = get_extension_funcs($ext); //获取某一扩展下的所有函数
if (!empty($funs) && is_array($funs)) {
foreach ($funs as $fun) {
$reflect = new ReflectionFunction($fun);
$params = $reflect->getParameters(); //获取函数参数信息
$param_str = '';
if (!empty($params) && is_array($params)) {
foreach ($params as $param) {
if ($param->getName() != '') {
$param_str .= '$' . $param->getName() . ',';
}
}
$param_str = substr($param_str, 0, -1);
}
$ext_info[$ext][] = $fun . '(' . $param_str . ')';
}
}
}
echo '<pre>';
print_r($ext_info);
19、校验身份证号码是否正确
function is_idcard($id) {
$id = strtoupper($id);
$regx = "/(^\d{15}$)|(^\d{17}([0-9]|X)$)/";
$arr_split = array();
if (!preg_match($regx, $id)) {
return false;
}
if (15 == strlen($id)) //检查15位
{
$regx = "/^(\d{6})+(\d{2})+(\d{2})+(\d{2})+(\d{3})$/";
@preg_match($regx, $id, $arr_split);
//检查生日日期是否正确
$dtm_birth = "19" . $arr_split[2] . '/' . $arr_split[3] . '/' . $arr_split[4];
if (!strtotime($dtm_birth)) {
return false;
} else {
return true;
}
} else {
$regx = "/^(\d{6})+(\d{4})+(\d{2})+(\d{2})+(\d{3})([0-9]|X)$/";
@preg_match($regx, $id, $arr_split);
$dtm_birth = $arr_split[2] . '/' . $arr_split[3] . '/' . $arr_split[4];
if (!strtotime($dtm_birth)) //检查生日日期是否正确
{
return false;
} else {
//检验18位身份证的校验码是否正确。
//校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
$arr_int = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
$arr_ch = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
$sign = 0;
for ($i = 0; $i < 17; $i++) {
$b = (int) $id{$i};
$w = $arr_int[$i];
$sign += $b * $w;
}
$n = $sign % 11;
$val_num = $arr_ch[$n];
if ($val_num != substr($id, 17, 1)) {
return false;
} else {
return true;
}
}
}
}20、获取微信accesstoken
public function getAccessToken()
{
$appid = 'wx1111111123243451';
$secret = 'afdfefefetgegegegege';
$accessTokenFile = './accessToken.txt';
if (file_exists($accessTokenFile)) {//文件存在
$time = time();
$tokenFileJson = file_get_contents($accessTokenFile);
$fileArrData = json_decode($tokenFileJson,true);
$fileExpireTime = isset($fileArrData['expireTime'])?$fileArrData['expireTime']:0;
if ($fileExpireTime > $time) {//请求token未过期
$accessToken = isset($fileArrData['access_token'])?$fileArrData['access_token']:'';
return $accessToken;
}else{
$url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$appid.'&secret='.$secret;
$jsonData = file_get_contents($url);
$arrData = json_decode($jsonData,true);
file_put_contents('./getToken.txt','【'.date("Y-m-d H:i:s").'】'.$jsonData.PHP_EOL,FILE_APPEND);
if (isset($arrData['errcode'])) {
exit($arrData['errmsg']);
}else{
$expireTime = time() + 5000;//过期时间
$accessToken = isset($arrData['access_token'])?$arrData['access_token']:'';
file_put_contents($accessTokenFile,json_encode(array('accessToken'=>$accessToken,'expireTime'=>$expireTime)));
return $accessToken;
}
}
}else{//文件不存在
$url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$appid.'&secret='.$secret;
$jsonData = file_get_contents($url);
$arrData = json_decode($jsonData,true);
file_put_contents('./getToken.txt','['.date("Y-m-d H:i:s").']'.$jsonData.PHP_EOL,FILE_APPEND);
if (isset($arrData['errcode'])) {
exit($arrData['errmsg']);
}else{
$expireTime = time() + 5000;//过期时间
$accessToken = isset($arrData['access_token'])?$arrData['access_token']:'';
file_put_contents($accessTokenFile,json_encode(array('accessToken'=>$accessToken,'expireTime'=>$expireTime)));
return $accessToken;
}
}
}
- 21、将远程图片下载到本地
/*
*功能：php完美实现下载远程图片保存到本地
*参数：文件url,保存文件目录,保存文件名称，使用的下载方式
*当保存文件名称为空时则使用远程文件原来的名称
*/
function getImage($url,$save_dir='',$filename='',$type=0){
if(trim($url)==''){
return array('file_name'=>'','save_path'=>'','error'=>1);
}
if(trim($save_dir)==''){
$save_dir='./';
}
if(trim($filename)==''){//保存文件名
$ext=strrchr($url,'.');
if($ext!='.gif'&&$ext!='.jpg'){
return array('file_name'=>'','save_path'=>'','error'=>3);
}
$filename=time().$ext;
}
if(0!==strrpos($save_dir,'/')){
$save_dir.='/';
}
//创建保存目录
if(!file_exists($save_dir)&&!mkdir($save_dir,0777,true)){
return array('file_name'=>'','save_path'=>'','error'=>5);
}
//获取远程文件所采用的方法
if($type){
$ch=curl_init();
$timeout=5;
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
$img=curl_exec($ch);
curl_close($ch);
}else{
ob_start();
readfile($url);
$img=ob_get_contents();
ob_end_clean();
}
//$size=strlen($img);
//文件大小
$fp2=@fopen($save_dir.$filename,'a');
fwrite($fp2,$img);
fclose($fp2);
unset($img,$url);
return array('file_name'=>$filename,'save_path'=>$save_dir.$filename,'error'=>0);
}
