if(is_string($a)){ echo "0 is string;"; }else{ echo "0 is not string;"; } if(!$a){ echo "0 is false;"; }else{ echo "0 is not false;"; } // 判断 '' 和 0、null、empty、false 之间的关系 $a = ''; echo "'' 和 0、empty、null、false 之间的关系:"; if($a == ...
140141if(is_string($a))142{143echo"'' is string;";144}145else146{147echo"'' is not string;";148}149150if(!$a)151{152echo"'' is false;";153}154else155{156echo"'' is not false;";157}158159//判断 null 和 ''、0、empty、false 之间的关系160$a=null;161echo"null 和 ''、0、e...
PHP empty() functionThe PHP empty() function used to check whether the string is empty or not.In PHP the empty() function return true if the variable has empty or zero value and it return false if string has non-empty or non-zero value....
bool setcookie( string $name [, string $value = "" [, int $expire = 0 [, string $path = "" [, string $domain = "" [, bool $secure = false [, bool $httponly = false ]]] ) bool setcookie ( string $name [, string $value = "" [, int $expire = 0 [, array $options ]...
$notEmpty='/.+/';//非空$floatTwo='/\d+\.\d{2}$/';//保留两位小数$phone='/1(3|5|7|8|4)\d{9}/';//手机号$email='/^\w+(\.\w+)*@\w+(\.\w+)+$/';//email$URL='/(https?://)?(\w+\.)+[a-zA-Z]+$/';//url地址?>...
基本功能 $status = match($request_method) { 'post' => $this->handlePost(),'get', 'head' => $this->handleGet(),default => throw new \Exception('Unsupported'),};用switch...case做对比，要实现上面的功能，代码要略繁琐一点:switch ($request_method) { case 'post':$status = $this->...
fastcgi_paramQUERY_STRING$query_string;fastcgi_paramREQUEST_METHOD$request_method;fastcgi_paramCONTENT_TYPE$content_type;fastcgi_paramCONTENT_LENGTH$content_length;fastcgi_paramSCRIPT_NAME$fastcgi_script_name;fastcgi_paramREQUEST_URI$request_uri;fastcgi_paramDOCUMENT_URI$document_uri;fastcgi_paramDOCUMENT_ROOT...
string(12) "preg_replace" string(35) "/7e5c9b7b04a66e52a084ded39a239b63/e" */ 以此类推,将所有不可见字符全都给替换回来之后,整个文件的代码就会变成如下所示,阅读起来非常简单。 function func0($var1,$var2="") { if(empty($var2)) { ...
if (!is_string($data)) { $data = json_encode($data); } //拼接"\r\n",是解决在循环场景下,投递任务可能会出现的tcp粘包问题。 return $this->client->send($data."\r\n"); } else { throw new \Exception('Swoole Server does not connected.'); ...
/*** 获取和设置配置参数 支持批量定义* @param string|array $name 配置变量* @param mixed $value 配置值* @param mixed $default 默认值* @return mixed*/function C($name = null, $value = null, $default = null){static $_config = array();// 无参数时获取所有if (empty($name)) {return...