Write a example code showing the nested ternary conditional operator in PHP?

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Write a example code showing the nested ternary conditional operator in PHP?

A example code showing the nested ternary conditional operator in PHP.

 <?php

$background_color = ($num == 0 ? 'blue' : ($num > 0 ? 'green' : 'red'));

?>

Here we are assigning different strings to the $background_color variable based on a numeric value ($num). 

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