A constant is a name or an identifier for a single value. The value of the constant cannot be changed during script execution. By default, a constant is case sensitive. By convention, constant identifiers are always uppercase. Constant names begin with a letter or an underscore (_), followed by any number of letters, numbers, or underscores. If you have defined a constant, it can never be changed or redefined.
In order to develop and run PHP pages, the following 3 basic components need to be installed on your computer system. Web Server - PHP will work with almost all Web Server software, including Microsoft's Internet Information Server (IIS), but then Apache Server is more commonly used. Download Apache for free from: http://httpd.apache.org/download.cgi
The PHP configuration file, php.ini, is the last and most direct step that affects PHP's functionality. This php.ini file is read every time PHP is initialized, in other words, whenever httpd is restarted for the Module Version or with each Script execution for CGI version. If your changes don't show up, remember to stop and restart httpd. If still not showing, use phpinfo() to check the path to php.ini.
What is php?. PHP started as a small open source project, but as it progressed, more and more people found it to be more and more useful. PHP was developed from a product called PHP/FI. PHP/FI, created by Rasmus Lerdorf in 1994, was originally viewed as a simple subset of the Perl script code to track online access to his resume. He named this script "Personal Home Page Tools".
Laravel currently supports us to do this through the pusher Broadcast. Hello everyone, today I want to share about a topic that is used a lot in Laravel projects that is realtime notification. Any task that needs realtime notifications such as new comments, new subscribers, likes of new posts, etc., we can use this function.