$$ 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

6 votes107 views3 answers
Laravel collection put
PHP
0 vote147 views2 answers
Recaptcha v3 laravel 8
PHP Laravel
7 votes98 views1 answer
Php configuration
PHP
0 vote110 views1 answer
How to Add Custom Fonts to a WordPress Theme
PHP Wordpress
8 votes114 views4 answers
Wordpress enqueue if shortcode
PHP
4 votes161 views2 answers
Laravel get authorization bearer token
PHP Laravel
53 votes260 views6 answers
Laravel make seeder
PHP Laravel
0 vote101 views1 answer
Combine 2 columns search query laravel
PHP
0 vote109 views1 answer
Get php ini config from terminal
PHP
0 vote92 views1 answer
How to extract code from controller to helpers or other method in laravel
PHP