php 7.4 null coalescing assignment operator

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1. Null coalescing assignment operator in PHP

   

2. The PHP null coalescing operator (??) explained

   

3. What is PHP null coalescing operator (??)

   

4. PHP's double question mark, or the null coalescing operator

   

5. PHP Elvis operator vs null coalescing operator

   

6. Null Coalescing Operator