?? ' ' in php

$$ in php

$x = "abc";  
$$x = 200;  
echo $x."<br/>";  
echo $$x."<br/>";  
echo $abc; 

// output:
abc
200
200

?? ' ' in php

// Null Coalesce Operator - $statement ?? ''
$categoryName = $category->name ?? 'Not Available';

// The above Statement is identical to this if/else statement
if (isset($category->name)) {
    $categoryName = $category->name;
} else {
    $categoryName  = 'Not Available';
}

-2

Similar codes

0 vote139 views1 answer
Unnamed place placeholders pdo
PHP
0 vote88 views1 answer
Who is known as the father of PHP?
PHP
5 votes101 views2 answers
Laravel mail send
PHP
4 votes130 views6 answers
Create project laravel
PHP Laravel
0 vote111 views1 answer
Php print string as bytes
PHP
0 vote103 views1 answer
Get deleted value laravel
PHP
0 vote107 views1 answer
Wordrpess debugg is off but still showing
PHP
0 vote106 views1 answer
Php check if valid xml
PHP
0 vote119 views2 answers
Access paginator object attribute in laravel
PHP Laravel
22 votes101 views4 answers
While in php
PHP