echo"0 is null;"; }else{ echo"0 is not null;"; } if(is_numeric($a)){ echo"0 is numeric;"; }else{ echo"0 is not numeric;"; } if(is_string($a)){ echo"0 is string;"; }else{ echo"0 is not string;"; } if(!$a){ echo"0
; } else { echo "The variable is empty or zero."; } 在这个示例中,我们首先定义了一个变量$variable,并将其值设置为"Hello, World!"。然后,我们使用if语句来检查$variable是否为非空、非零。如果$variable不为空且不等于0,则输出"The variable is not empty and not zero.",否则输出"The variable is...
}if(strval($a) == ''){echo"strval(null) == '';"; }else{echo"strval(null) != '';"; }if(intval($a) == 0){echo"intval(null) == 0;"; }else{echo"intval(null) != 0;"; }if(empty($a)){echo"null is empty;"; }else{echo"null is not empty;"; }if(is_numeric($a))...
2018-02-05 10:10 − 有查询条件就查询, 多个查询条件,只要有查询,就增加一个查询条件 //类型 if($sotype){ &n... 袁浩浩 0 36081 Thinkphp CURD中的where方法 2014-01-17 17:04 − 今天来给大家讲下查询最常用但也是最复杂的where方法,where方法也属于模型类的连贯操作方法之一,主要用于查询和...
try{$dsn='mysql:host=localhost;dbname=datatype';//数据源$user='root';$pwd='toly';$conn=newPDO($dsn,$user,$pwd);//---建表---$sql_create_table=<<<EOTCREATETABLEIFNOTEXISTSphp_pic(idINTUNSIGNEDAUTO_INCREMENTPRIMARYKEY,pic_pathVARCHAR(120)NOTNULL,pic_lengthINTUNSIGNEDDEFAULT0,pic_mimeTI...
If a save is already running, this command will fail and return FALSE. Example $redis->bgSave(); config Description: Get or Set the Redis server configuration parameters. Prototype $redis->config(string $operation, string|array|null $key = NULL, ?string $value = NULL): mixed; Return ...
/** * 用户登录界面 * @return string */publicfunctionlogin(){//若存在seesion信息则直接跳过if(session('user_info')){returnjson("登录成功");}//若存在cookie信息则直接跳过if(cookie("user_info")){returnjson("登录成功");}returnView::fetch('login/login');} ...
private function getArgs($key, $method) { $dataSource = null; $isNginxEnv = false; if ($method == 'GET') { if (function_exists('ngx_query_args')) { $dataSource = ngx_query_args(); $isNginxEnv = true; } else { $dataSource = $_GET; } } else { if (function_exists('ngx...
This model may be used with the default Eloquent authentication driver. If your application is not using Eloquent, you may use the database authentication driver which uses the Laravel query builder.When building the database schema for the App\User model, make sure the password column is at ...
If the header is not present on the request, null will be returned. However, the header method accepts an optional second argument that will be returned if the header is not present on the request:1$value = $request->header('X-Header-Name'); 2 3$value = $request->header('X-Header...