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Operators are used to manipulate or perform operations on variables and values. There are many operators used in PHP, we have separated them into the following categories.
- Assignment Operators
- Arithmetic Operators
- Comparison Operators
- Logical Operators
Assignment Operators:
Assignment operators are used to set a variable equal to a value or set a variable to another variable's value. ‘=’ is used for assignment operator. Example:
$var = 23;
$var2 = $var;
Operator
| Example
| Is The Same As
| =
| a=b
| a=b
| +=
| a+=b
| a=a+b
| -=
| a-=b
| a=a-b
| *=
| a*=b
| a=a*b
| /=
| a/=b
| a=a/b
| .=
| a.=b
| a=a.b
| %=
| a%=b
| a=a%b
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Arithmetic Operators:
Operator
| Function
| +
| Addition
| -
| Subtraction
| *
| Multiplication
| /
| Division
| %
| Modulus (division remainder)
| ++
| Increment
| --
| Decrement
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Comparison Operators:
Operator
| Function
| Example
| Result
| ==
| Equal To
| $x == $y
| false
| !=
| Not Equal To
| $x != $y
| true
| <
| Less Than
| $x < $y
| true
| >
| Greater Than
| $x > $y
| false
| <=
| Less Than or Equal To
| $x <= $y
| true
| >=
| Greater Than or Equal To
| $x >= $y
| false
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Logical Operators:
Operator
| Function
| Example
| &&
| and
| x=8
y=4
(x < 10 && y > 1) returns true
| ||
| or
| x=12
y=8
(x>=5 || y<=5) returns true
| !
| not
| x=6
y=3
!(x==y) returns true
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