Operators in PHP---arithmetic operators, logical operators, assignment operators, comparison operators

1. Arithmetic operators

Operation type Inversion operation Addition operation Subtraction operation Multiplication operation Return $ The quotient of a and $b $a % $b returns the remainder of $a and $b out out out out Operation type Logical AND

Operator	Example	Result
-	-$a	Returns the negative value of $a
+	$a + $b	Return $a with The sum of $b
-	$a - $b	Returns the difference between $a and $b
+		remainder operation	%
		2. logic Operators
Operator	Example	Result

&& or and

$a && $b or $a and $b

When both $a and $b are true, return true, otherwise return false When $a or $b is true, return true, otherwise return false When $a is true $b is false or $a is false $b is true, return true, otherwise return false The assignment operator "=" is the most basic in PHP Operator, that is, assign the value of the expression on the right side of "=" to the operand on the left. Curber +=

	logical or	| | or or	$a || $b or $a or $b
	logical exclusive OR	xor	$a xor $b
	logical not !	!$a	When $a is false, return true, otherwise return false
3. Assignment operator	In addition, the compound assignment operator is also commonly used in PHP.值 赋 Composite assignment operator		Computing type
Example	Results		Add method

$a += 5

$a plus 5 and assign to $a 5 The difference is assigned to $a. The product of $a multiplied by 5 is assigned to $a.

Division assignment

4. Comparison operator

/= %=

$a /= 5	$a divided by 5 is assigned the quotient of $a		Take the remainder and assign
$a %= 5	$a divided by 5, the remainder is assigned to $a

When the value of $a is greater than the value of $b, then return true, otherwise return false When the value of $a is less than or equal to the value of $b, it returns true, otherwise it returns false When the value of $a is greater than or equal to the value of $b, it returns true, otherwise it returns false When$ If the value of a is equal to the value of $b, return true, otherwise return false When the value of $a is equal to the value of $b, and The types of $a and $b are also equal, then return true, otherwise return false when $a If the value is equal to the value of $b, return false, otherwise return true When the value of $a is equal to the value of $b, and $a The type of $b is also equal, then false is returned, otherwise true is returned The above has introduced the operators in PHP---arithmetic operators, logical operators, assignment operators, comparison operators, including relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.

Operation type	operator	Example	The result
is less than	<	$a < $b	When the value of $a is less than $b $b
	less than or equal to	<=	$a <= $b
	greater than or equal to	>=	$a >= $b
	Equal	==	$a == $b
	Congruent	===	$a === $b
	not equal	!=	$a != $b or $a <> $b
	not equal	!==	$a !== $b