Operator could be given using term 4 + 7 is equal to 11. Here 4 and 7 are called operands and + is called operator.

PHP supports subsequent type of operators:-
• Arithmetic Operators
• Comparison Operators
• Logical (or Relational) Operators
• Assignment Operators
• Conditional (or ternary) Operators
Arithmetic Operators:-
These operators are used with numeric values to execute universal arithmetical operations, such as addition, subtraction etc.

Example:-

Operator Description Example
+ Adds two operands 5 + 1 will give 6
Subtracts second operand from the first 5 – 1 will give 4
* Multiply both operands 4 * 5 will give 20
/ Divide numerator by de-numerator 5 / 1 will give 5
% Modulus Operator and remainder of after an integer division 5% 1 will give 0
++ Increment operator, increases integer value by one 5++ will give 6
Decrement operator, decreases integer value by one 5– will give 4

Comparison Operators:-
These operators are used for comparison.

Example:-

Operator Description Example
== Checks if the value of two operands is equal or not, if yes then condition becomes true. (5 == 1) is not true.
!= Checks if the value of two operands is equal or not, if values are not equal then condition becomes true. (5 != 1) is true.
> Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true. (1> 5) is not true.
< Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true. (1 < 5) 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. (1 >= 5) 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. (1 <= 1) is true.

Logical Operators:-
These operators are used for logical functions.

Example:-

Operator Description Example
and Called Logical AND operator. If both the operands are true then condition becomes true. (K and Z) is true.
or Called Logical OR Operator. If any of the two operands are non zero then condition becomes true. (K or Z) is true.
&& Called Logical AND operator. If both the operands are non zero then condition becomes true. (K && Z) is true.
|| Called Logical OR Operator. If any of the two operands are non zero then condition becomes true. (K || Z) is true.
! Called Logical NOT Operator. Use to reverses the logical state of its operand. If a condition is true then Logical NOT operator will make false. !(K && Z) is false.

Assignment Operators:-
There are subsequent assignment operators.

Example:-

Operator Description Example
= Simple assignment operator, Assigns values from right side operands to left side operand K = L + M will assign value of L + M into K
+= Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand K += L is equivalent to K = K + L
-= Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand K-= L is equivalent to K = K – L
*= Multiply AND assignment operator, It multiplies right operand with the left operand and assign the result to left operand K*= L is equivalent to K = K * L
/= Divide AND assignment operator, It divides left operand with the right operand and assign the result to left operand K/= L is equivalent to K = K / L
%= Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operand K %= L is equivalent to K = K % L

Conditional Operator:-
This operator evaluates an expression for a true or false value and then executes one of the two given declarations depending upon the result of the assessment.

Example:-

Operator Description Example
? : Conditional Expression If Condition is true ? Then value K : Otherwise value M

 

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