What is the usage of and in PHP

In PHP, and is used for logical judgment. The syntax is "value 1 and value 2". If the operands on both sides of and are true, then return true, otherwise return false; and is a logical operator , like the "&&" operator, both represent logical "AND", and the "&&" operator has a higher priority than and.

The operating environment of this article: Windows 10 system, PHP version 7.1, Dell G3 computer

What is the usage of and in PHP

The 'and' operator in PHP is called a logical operator. If both operands are true, return true.

Example:

        

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Output: False

Explanation: Since variable $a = 100 and another variable $b = 10, the condition $a == 100 is calculated The result is true, and $b == 10 evaluates to true. Therefore, '$a == 100 and $b == 10' evaluates to true because AND logic says that if both operands are true, the result is also true. But when $b = 20 is input, the condition $b == 10 is false, so the AND operation result will be false.

The ‘&&’ operator in PHP is also called a logical operator. If both operands are true, return true.

Example:

        

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Output: True

Explanation: Since variable $a = 100 and another variable $b = 10, the calculation result of condition $a == 100 is true, and pow($b,2)==$a also evaluates to true because $b = 10 raised to the power of 2 is 100, which is equal to $a. Therefore, '$a == 100 && pow($b,2)==$a' evaluates to true because AND logic states that the AND operation will be true only if both operands are true. But when $b = 20 is input, the condition pow($b,2)==$a is false, so the AND operation result is false.

Comparison between 'AND' and '&&' operators:

Based on precedence:

Priority basically determines which operations are performed first in an expression. The '&&' operator has high precedence, and the 'AND' operator has low precedence.

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