Double not (!!) operator in PHP

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The operator (!!) is returned as this boolean function. If you use! for expression, true will be true and false - false. This does not change the boolean value. By using this double not (!!) operator, it can improve the readability of your code and also provide true and false values ‚Äã‚Äãfor strictly boolean data types.Example 1:
// Declare a variable
// and initialize it $a = 1;
// Use the double not operator $a = !! $a ;
// Show value
// variable a. echo $a ; ?>
The difference between the logical NOT operator (!) AND with the Double NOT (!!) operator in PHP:The Not operator mathematically complements or cancels the boolean value of the corresponding data. For example, boolean $a = True, then NOT operator superimposed on it! $A will be False. It’s about the logical NOT or the negation operator. Where, since the Double NOT operator (!!) only returns a boolean cast or a truth value. I.e !! $is always TRUE.
Here’s another example based on the double NOT operator.Example 2:
// PHP illustration program
// NOT double statement
// Declare a variable and
// initialize this $t = 10;
// Check status if ( $t ! == 10) echo " This is NOT operator! " ; elseif (!! $t ) echo "This is Double NOT operator!" ; else echo " Finish! " ; ?>
The above code strictly preserves the boolean data type and returns a truth value variable.

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We hope this article has helped you to resolve the problem. Apart from Double not (!!) operator in PHP, check other ast Python module-related topics.

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Chen Robinson

Vigrinia | 2023-01-31

Thanks for explaining! I was stuck with Double not (!!) operator in PHP for some hours, finally got it done 🤗. Checked yesterday, it works!

Xu Nickolson

San Francisco | 2023-01-31

I was preparing for my coding interview, thanks for clarifying this - Double not (!!) operator in PHP in Python is not the simplest one. Will use it in my bachelor thesis

Javier Innsbruck

Abu Dhabi | 2023-01-31

Maybe there are another answers? What Double not (!!) operator in PHP exactly means?. Will use it in my bachelor thesis

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