?? ' ' 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 vote326 views2 answers
Socket io laravel
PHP
0 vote335 views1 answer
Order review checkout page reset woocomerce
PHP
0 vote330 views1 answer
Php csv to multirow array $_FILES
PHP
1 vote358 views1 answer
Laravel validation required_if one parameter exist
PHP Laravel
0 vote312 views1 answer
Regenerate session ID and remove all session data
PHP
0 vote330 views1 answer
Small rce php
PHP
0 vote341 views2 answers
Laravel store file
PHP
3 votes324 views3 answers
Laravel pagination having raw query not working
PHP
0 vote321 views2 answers
Jquery is less than or equal to
PHP
0 vote371 views1 answer
Wordpress disallow_file_edit
PHP Wordpress