?? ' ' 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

6 votes387 views3 answers
Laravel bootstrap auth scaffolding
PHP Laravel
8 votes399 views4 answers
Laravel hash password sample
PHP Laravel
1 vote324 views2 answers
Laravel print request data
PHP
1 vote407 views1 answer
Example code codeigniter seeders
PHP CodeIgniter
8 votes384 views4 answers
Laravel unique validation on multiple columns
PHP Laravel
0 vote480 views1 answer
Drupal 8 user_load
PHP Drupal
2 votes343 views2 answers
Assign multiple variables php
PHP
25 votes316 views4 answers
Php get client ip address
PHP
2 votes330 views1 answer
Hmtl dellete tag php
PHP
3 votes332 views1 answer
Artisan to make model controller factroy seeder at once
PHP