*/function__construct($appInfo, $clientIdentifier, $userLocale = null){ AppInfo::checkArg("appInfo", $appInfo); Checker::argStringNonEmpty("clientIdentifier", $clientIdentifier); Checker::argStringNonEmptyOrNull("userLocale", $userLocale);$this->appInfo = $appInfo;$this->clientIdentifier =...
In our specific case, we can ignore what happens with other types because the nickname argument will always be null or string; even if we pass an integer 0, it will become a string '0' because of the type hint.function formatUser( ?User $user, ?bool $isVip, ?string $nickname, ?
If you want to check if a string IS empty then do: !check_not_empty($var).So, whenever you want to check if a form field both exists and contains a value just do: if (check_not_empty($_POST['foo'], 1))no need to do if (isset() && !empty()) anymore =] ...
echo empty($test),empty(100),empty($b=100); Parse error: parse error, unexpected T_LNUMBER, expecting T_STRING or T_VARIABLE or '$' in PHPDocument3 on line 3 is_null函数参数: <?php $test=100; echo is_null($test),is_null(100),is_null($b=100); 运行结果:没有任何错误。 比...
[用法] Empty string judge 在判断一个字符串是否为空时,我们一般是这样写的: // 判断不为空 if (str != null && !...知道这条规定,就可以发现上面的问题了:当str为空时str?.isEmpty()输出的结果为null,而这在if语句中,实际上相当于false,那么也就是说当...
* parameter or `null` if this is a generic * error. */publicfunction__construct($code, $invalidValue, $installerName, $parameterName = null){ Assert::oneOf($code,self::$codes,'The violation code %s is not valid.'); Assert::stringNotEmpty($installerName,'The installer name must be ...
· $conn –This required parameter is a PHP connection resource created with the sqlsrv_connect function (see the Creating a Connection section). · $tsql –This required parameter is a string that defines a Transact-SQL query. Question marks (?) are used as placeholders for parameters. ·...
null)public current(): string|array|false|voidpublic eof(): boolvoidpublic fflush(): boolvoidpublic fgetc(): string|false|voidpublic fgetcsv(string $separator = ",", string $enclosure = "\"", string $escape = "\\"): array|falsepublic fgets(): stringvoidpublic fgetss(string $allowable_...
$collection->first(function ($value, $key) { return ! is_null($value); });In previous versions of Laravel, the $key was passed first. Since most use cases are only interested in the $value it is now passed first. You should do a "global find" in your application for these methods...
V5.1.23+版本开始,支持findOrEmpty方法,当查询不存在的时候返回空数组而不是Null。 代码语言:javascript 复制 // table方法必须指定完整的数据表名 Db::table('think_user')->where('id',1)->findOrEmpty(); 如果没有查找到数据,则会抛出一个think\db\exception\DataNotFoundException异常。