What Is The Significance Of The Double Question Mark (??) Operator In PHP?

In PHP, the double question mark (??) operator is known as the null coalescing operator. It is used to provide a default value for a variable if it is null.

The syntax for null coalescing operator is:

$variable = $value ?? $default;

Here, if the $value is not null, the variable $variable will be assigned the value of $value. However, if $value is null, the variable $variable will be assigned the value of $default.

For example:

$name = $_GET['name'] ?? 'Unknown';

In the above example, if the ‘name’ parameter is present in the query string, its value will be assigned to the $name variable. But if the ‘name’ parameter is not present or is null, the $name variable will be assigned the value ‘Unknown’.

It is a shorthand way of writing conditional statements and simplifies the code by providing a default value in case of null values.

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I'm a passionate tech blogger with an insatiable love for programming! From my early days tinkering with code, I've delved into web dev, mobile apps, and AI. Sharing insights and tutorials with the world is my joy, connecting me to a global community of like-minded tech enthusiasts. Python holds a special place in my heart, but I embrace all challenges. Constantly learning, I attend tech conferences, contribute to open-source projects, and engage in code review sessions. My ultimate goal is to inspire the next generation of developers and contribute positively to the ever-evolving tech landscape. Let's code together!