PHP logical && operator . PHP 7 introduced “null coalesce operator (?? We can provide the default values if the parameters are not received from user input: These operators are syntax sugar only, and do not provide any meaningful performance difference compared to good ol' if/else blocks. PHP 7 was released on 3 rd Dec 2015. Finally, there is a single ternary operator , ? Null Coalescing Assignment operator is relatively new in PHP (added in PHP 7.4), so you code might not work in older PHP versions if you decide to use that operator. the evlis operator (? : (Elvis Operator) Since PHP 5.3+, we can use the shorter ternary operator syntax by leaving out the middle part of the ternary operator for a quick shorthand evaluation: In PHP 7 this was originally released, allowing a developer to simplify an isset() check combined with a ternary operator. This tutorial will teach you the new features of PHP 7 and their usage in a simple and intuitive way. To unpack an array or a Traversable, it has to be prepended by … Forget array_merge: PHP 7.4 Brings Spread Operator in Array Expression Available since PHP 5.6, argument unpacking is a syntax for unpacking arrays and Traversables into argument lists. An advantage of using a ternary operator is that it reduces the huge if-else block to a single line, improving the code readability and simplify it. Hence when we want to assign a default value we can write: We've already described simple examples of assignment, in which a variable is assigned the value of an expression using an equals sign. Which explains that if both of conditions are FALSE or 0, the return is FALSE or 0. For integer division, see intdiv(). This above pictorial helps you to understand the concept of LOGICAL AND operation with an analogy of taps and water. In case-1 of the picture, both of the taps are closed, so the water is not flowing down. Those two are equivalent 1: The definition of how it works is: It returns its first operand if it exists and is not NULL; otherwise it returns its second operand. Binary operators take two values, such as the familiar arithmetical operators + (plus) and -(minus), and the majority of PHP operators fall into this category. So it's actually just isset() in a handy operator. It does not generate any notices if not defined. When we use ternary operator: We use the ternary operator when we need to simplify the if-else statements that are simply assigning values to variables depending on a condition. :), and the null coalescing operator (??? This operator ?? It's the "null coalescing operator", added in php 7.0. In this article, we'll compare and analyze the two shorthand conditional operators in PHP, the shorthand ternary operator, i.e. For example, before PHP 7, we might have this code: For example, before PHP 7, we might have this code: Output: Adult. is ideal to use with $_POST and $_GET for getting input from users or urls. In addition to what Lawrence said about assigning a default value, one can now use the Null Coalescing Operator (PHP 7). PHP 7 is the most awaited and is a major feature release of PHP programming language. I.e: You want to set a default value to a variable if it is not defined, using the Elvis operator PHP will says that 0 is not defined, but you might want that 0... That's why PHP 7 will get the Null Coalesce operator, It will strictly test your variable against null, so PHP will says … )” to check whether a variable contains value , or returns a default value. 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