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 $a = ''; echo "'' 和 0、empty、
140141if(is_string($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...
Redis::REDIS_STRING - String Redis::REDIS_SET - Set Redis::REDIS_LIST - List Redis::REDIS_ZSET - Sorted set Redis::REDIS_HASH - Hash Redis::REDIS_NOT_FOUND - Not found / other @TODO: OPT_SERIALIZER, AFTER, BEFORE,... Connection connect, open - Connect to a server pconnect, popen...
The PHP emplty() 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.
$notEmpty='/.+/';//非空$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?>...
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...
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...
PHP Sessions are bits of data about a user, meant to stick with users as they navigate your site. A PHP Session involves setting a cookie calledPHPSESSIDwith a unique identification string as the value. EX: Storing shopping cart data, recently viewed items, or a logged-in status across mul...
requiredEnsures the specified key value exists and is not empty (not null, not empty string, not empty array). contains,one;two;use array format if one of the values contains semicolonsVerify that a value is contained within the pre-defined value set. ...
These middleware will automatically trim all incoming string fields on the request, as well as convert any empty string fields to null. This allows you to not have to worry about these normalization concerns in your routes and controllers.