A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_URI::$config is deprecated
Filename: core/URI.php
Line Number: 101
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Router::$uri is deprecated
Filename: core/Router.php
Line Number: 127
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$benchmark is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$hooks is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$config is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$log is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$utf8 is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$uri is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$exceptions is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$router is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$output is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$security is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$input is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$lang is deprecated
Filename: core/Controller.php
Line Number: 82
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$db is deprecated
Filename: core/Loader.php
Line Number: 396
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_DB_mysqli_driver::$failover is deprecated
Filename: database/DB_driver.php
Line Number: 371
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: Trying to access array offset on true
Filename: libraries/Email.php
Line Number: 978
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$email is deprecated
Filename: core/Loader.php
Line Number: 1283
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 295
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 169
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 238
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 318
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 359
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 282
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 289
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 304
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 314
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 315
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 316
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 317
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 375
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: session_set_save_handler(): Session save handler cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 110
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: Warning
Message: session_start(): Session cannot be started after headers have already been sent
Filename: Session/Session.php
Line Number: 143
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$session is deprecated
Filename: core/Loader.php
Line Number: 1283
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Blogs::$user_model is deprecated
Filename: core/Loader.php
Line Number: 358
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/User.php
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$load is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$pgmodule is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$benchmark is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$hooks is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$config is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$log is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$utf8 is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$uri is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$exceptions is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$router is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$output is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$security is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$input is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$lang is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$db is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$email is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$session is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$user_model is deprecated
Filename: core/Loader.php
Line Number: 931
Backtrace:
File: /home1/biognosy/skmlhometuitions.in/application/controllers/Blogs.php
File: /home1/biognosy/skmlhometuitions.in/index.php
Difference between var and let in JavaScript | Post Details - SKML Home Tuitions
Difference between var and let in JavaScript
var and let are both used for variable declaration in javascript but the difference between them is that var is function scoped and let is block scoped.
1: Variable scopes
The var variables belong to the global scope or local scope if they are declared inside a function:
var counter;
The let variables are blocked scopes:
let counter;
2: Creating global properties
The global var variables are added to the global object as properties. The global object is window on the web browser and global on Node.js:
var counter = 0;
console.log(window.counter); // 0
However, the let variables are not added to the global object:
let counter = 0;
console.log(window.counter); // undefined
3: Redeclaration
The var keyword allows you to redeclare a variable without any issue.
var counter = 10;
var counter;
console.log(counter); // 10
If you redeclare a variable with the let keyword, you will get an error:
let counter = 10;
let counter; // error
4: The Temporal dead zone
The let variables have temporal dead zones while the var variables don’t. To understand the temporal dead zone, let’s examine the life cycles of both var and let variables, which have two steps: creation and execution.
The var variables
· In the creation phase, the var variables are assigned storage spaces and immediately initialized to undefined.
· In the execution phase, the var variables are assigned the values specified by the assignments if there are ones. If there aren’t, the values of the variables remain undefined.
The let variables
· In the creation phase, the let variables are assigned storage spaces but are not initialized. Referencing uninitialized variables will cause a ReferenceError.
· The let variables have the same execution phase as the var variables.
The temporal dead zone starts from the block until the let variable declaration is processed. In other words, it is where you cannot access the let variables before they are defined.
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