Possible Duplicate: What does $$ mean in PHP? Double dollar sign php What is $$ in php. This question is asked in a recent interview for a web developer position. Thanks in advance! This is a variable variable. They work by using a variable to contain the name of another variable like...
What is => in PHP? => is also an arrow function, and it is typically referred to as the double arrow operator. Unlike ->, the => arrow symbol is an assignment operator which is used when a developer wants to create associative arrays. You can find => operators between the array key...
A PHP function is like a mini-recipe within your main recipe. It takes in some inputs, performs a specific task, and produces an output. For example, let’s say you want to make a function that calculates the area of a circle. The inputs are the radius of the circle, and the outp...
PHP is free and open source. Developers can find the source code on GitHub. PHP is currently licensed under the PHP License, version 3.01, which provides for its use in both source and binary forms, with or without modifications. The license also outlines specific conditions that must be met...
PDO is an advanced tool that every PHP developer should know. It provides security, flexibility, and performance benefits over the database-specific APIs. I highly recommend you start learning PDO if you haven’t already to take your database skills to the next level!
1. An event occurs in a web page (the page is loaded, a button is clicked) 2. An XMLHttpRequest object is created by JavaScript 3. The XMLHttpRequest object sends a request to a web server 4. The server processes the request
A a great way to learn GitHub, before working on larger projects, is to open pull requests in your own repository and merge them yourself. You merge any changes into the master by clicking a "Merge pull request" button. After merging you can delete the branch by clicking a "Delete branch...
The php.ini file is a special file for PHP. The php.ini file is where you declare changes to your PHP settings. You can use the default settings for the server and change specific settings by using the MultiPHP INI Editor.
PHP code is contained in files that end in the .php extension. If you have ever opened a WordPress zip file, you’ll see that most of the files are PHP files. For example, in the screenshot below, you’ll notice file names like wp-config.php, index.php, and lots more. Each of ...
In PHP, "++$i" is the pre-increment operator and "$i++" is the post-increment operator. The difference between the two is the order in which the operation is performed. With the pre-increment operator (++$i), the value of the variable is incremented before it is used in the ...