PHP basic syntax (2)

Basic PHP syntax (2) VII. PHP operator 1. arithmetic operator description + plus-minus * multiplication and division % modulo 2. Assignment operator value assignment is equivalent to the description of the right expression of xyxy to set the value of the left Operation number. X + yxx + y + x-yxx-y minus the basic syntax of x * yxx * y PHP (2)

VII. PHP operator 1. arithmetic operator

Arithmetic	Description
+	Add
-	Subtraction
*	Multiplication
/	Division
%	Modulo

2. value assignment operator

Assignment	Equivalent	Description
X = y	X = y	The expression on the right sets the value for the number of operations on the left.
X + = y	X = x + y	Add
X-= y	X = x-y	Subtraction
X * = y	X = x * y	Multiplication
X/= y	X = x/y	Division
X % = y	X = x % y	Module

3. string operators

Operator	Name	Example	Result
.	Concatenation	$ Txt1 = "Hello" $ txt2 = $ txt1. "world !"	Now $ txt2 contains "Hello world !"
. =	Serial assignment	$ Txt1 = "Hello" $ txt1. = "world !"	Now $ txt1 contains "Hello world !"

4. increment/decrease operator

Operator	Name	Description
++ $ X	Ascending	$ X increment by one, and then returns $ x
$ X ++	Post-increment	Returns $ x, and increments by $ x plus one.
-$ X	Decrease before	$ X Minus One decrease, and then returns $ x
$ X-	Decrease	Returns $ x, and then decreases by $ x.

5. Comparison operators

Operator	Name	Example	Result
=	Equal	$ X = $ y	Returns true if $ x is equal to $ y.
===	Equality (identical)	$ X ===$ y	Returns true if $ x is equal to $ y and has the same type.
! =	Not equal	$ X! = $ Y	Returns true if $ x is not equal to $ y.
<>	Not equal	$ X <> $ y	Returns true if $ x is not equal to $ y.
! =	Incomplete (completely different)	$ X! ==$ Y	If $ x is not equal to $ y and their types are different, true is returned.
>	Greater	$ X> $ y	If $ x is greater than $ y, true is returned.
<	Greater	$ X <$ y	If $ x is less than $ y, true is returned.
> =	Greater than or equal	$ X> = $ y	Returns true if $ x is greater than or equal to $ y.
<=	Less than or equal	$ X <= $ y	If $ x is less than or equal to $ y, true is returned.

6. logical operators

Operator	Name	Example	Result
And	And	$ X and $ y	If both $ x and $ y are true, true is returned.
Or	Or	$ X or $ y	If either $ x or $ y is true, true is returned.
Xor	Exclusive or	$ X xor $ y	If $ x and $ y have only one of them, true is returned.
&&	And	$ X & $ y	If both $ x and $ y are true, true is returned.
|	Or	$ X | $ y	If either $ x or $ y is true, true is returned.
!	Non	! $ X	Returns true if $ x is not true.

7. array operators

Operator	Name	Example	Result
+	Union	$ X + $ y	$ X and $ y (but do not overwrite duplicate keys)
=	Equal	$ X = $ y	Returns true if $ x and $ y have the same key/value pair.
===	Full	$ X ===$ y	True is returned if $ x and $ y have the same key/value pairs with the same sequence and type.
! =	Not Equal	$ X! = $ Y	Returns true if $ x is not equal to $ y.
<>	Not Equal	$ X <> $ y	Returns true if $ x is not equal to $ y.
! =	Incomplete	$ X! ==$ Y	Returns true if $ x is different from $ y.

Copyright Disclaimer: This article is an original Lshare article. if you need to reprint it, please contact me. if you have any questions, please comments or private messages.