?? ' ' 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

7 votes126 views2 answers
Update url wordpress
PHP
16 votes123 views6 answers
Php delete session
PHP
0 vote115 views1 answer
Status messages wordpress settings form
PHP
0 vote147 views2 answers
How to disable laravel cors
PHP Laravel
0 vote130 views1 answer
Php count matching words in two strings
PHP
1 vote124 views1 answer
Change the maximum upload file size
PHP
0 vote129 views1 answer
Fat-free captcha plugin
PHP
0 vote124 views1 answer
Define return type for php function string or boolean
PHP
18 votes140 views6 answers
Where clause in laravel
PHP Laravel
1 vote153 views1 answer
$posts- links() laravel design error
PHP Laravel