PHP logical && operator . Those two are equivalent 1: This above pictorial helps you to understand the concept of LOGICAL AND operation with an analogy of taps and water. operator which rather than indicating extreme confusion which is how I would usually use two question marks together instead allows us to chain together a string of values. PDO. Previously this was only supported by the pgsql driver. For integer division, see intdiv(). In PHP 7 we additionally get the ?? Output: Adult. PHP 7 was released on 3 rd Dec 2015. In case-1 of the picture, both of the taps are closed, so the water is not flowing down. This tutorial will teach you the new features of PHP 7 and their usage in a simple and intuitive way. Reading from left to right, the first value which exists and is not null is the value that will be returned. 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. Indeed prior to PHP 8.0.0, ternary expressions were evaluated from left to right, instead of right to left like most other programming languages. Most numeric assignments and expressions that work in other high-level languages also work in PHP. The division operator ("/") returns a float value unless the two operands are integers (or strings that get converted to integers) and the numbers are evenly divisible, in which case an integer value will be returned. Example. The spaceship operator or combined comparison operator is denoted by “=>“. We've already described simple examples of assignment, in which a variable is assigned the value of an expression using an equals sign. Null coalescing is a new operator introduced in PHP 7. 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. This is a three-way comparison operator and it can perform greater than, less … To unpack an array or a Traversable, it has to be prepended by … Which explains that if both of conditions are FALSE or 0, the return is FALSE or 0. PHP's behaviour when using more than one ternary operator within a single statement is non-obvious compared to other languages. PHP 7 is the most awaited and is a major feature release of PHP programming language. php documentation: Null Coalescing Operator (??) This operator returns its first operand if it is set and not NULL.Otherwise it will return its second operand. So it's actually just isset() in a handy operator. Hence when we want to assign a default value we can write: This article will make you aware of a very useful operator i.e the spaceship operator PHP 7. 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. In addition to what Lawrence said about assigning a default value, one can now use the Null Coalescing Operator (PHP 7). 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. The username and password can now be specified as part of the PDO DSN for the mysql, mssql, sybase, dblib, firebird and oci drivers. It's the "null coalescing operator", added in php 7.0.

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