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What is Operator?
Simple answer can be given using expression 4 + 5 is equal to 9. Here 4 and 5 are called operands and + is called operator.
PHP Operator is a symbol i.e used to perform operations on operands.
PHP language supports following type of operators. for example:
In the above example, + is the binary + operator, 10 and 20 are operands and $num is variable.
- Arithmetic Operators
- Comparison Operators
- Logical (or Relational) Operators
- Assignment Operators
Arithmetic Operators
The arithmetic operators are used to perform common arithmetical operations, such as addition, subtraction, multiplication etc. Here’s a complete list of PHP’s arithmetic operators:
| Operator | Description | Example | Result |
|---|---|---|---|
| + | Addition | $x + $y | Sum of $x and $y |
| – | Subtraction | $x – $y | Difference of $x and $y. |
| * | Multiplication | $x * $y | Product of $x and $y. |
| / | Division | $x / $y | Quotient of $x and $y |
| % | Modulus | $x % $y | Remainder of $x divided by $y |
Example:
output:
Comparison Operators
The comparison operators are used to compare two values in a Boolean fashion.
Examples
| Operator | Description | Example |
|---|---|---|
| == | Checks if the value of two operands are equal or not, if yes then condition becomes true. | (A == B) is not true. |
| != | Checks if the value of two operands are equal or not, if values are not equal then condition becomes true. | (A != B) is true. |
| > | Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true. | (A > B) is not true. |
| < | Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true. | (A < B) is true. |
| >= | Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true. | (A >= B) is not true. |
| <= | Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true. | (A <= B) is true. |
Example:
output:
PHP Assignment Operators
The assignment operators are used to assign values to variables.
| Operator | Description | Example | Is The Same As |
|---|---|---|---|
| = | Assign | $x = $y | $x = $y |
| += | Add and assign | $x += $y | $x = $x + $y |
| -= | Subtract and assign | $x -= $y | $x = $x – $y |
| *= | Multiply and assign | $x *= $y | $x = $x * $y |
| /= | Divide and assign quotient | $x /= $y | $x = $x / $y |
| %= | Divide and assign modulus | $x %= $y | $x = $x % $y |
Example:
Output:
PHP Logical Operators
The logical operators are typically used to combine conditional statements.
| Operator | Name | Example | Result |
|---|---|---|---|
| and | And | $x And $y | True if both $x and $y are true |
| or | Or | $x or $y | True if either $x or $y is true |
| xor | Xor | $x xor $y | True if either $x or $y is true, but not both |
| && | And | $x && $y | True if both $x and $y are true |
| || | Or | $x || $y | True if either $$x or $y is true |
| ! | Not | !$x | True if $x is not true |
Example:
Output:
