# PHP Arithematic Operators

Operator Name Description Example Result
x + y Addition Sum of x and y 2 + 2 4
x – y Subtraction Difference of x and y 5 – 2 3
x * y Multiplication Product of x and y 5 * 2 10
x / y Division Quotient of x and y 15 / 5 3
x % y Modulus Remainder of x divided by y 5 % 210 % 8

10 % 2

12

0

– x Negation Opposite of x – 2
a . b Concatenation Concatenate two strings “Hi” . “Ha” HiHa

# PHP Assignment Operators

Assignment Same as… Description
x = y x = y The left operand gets set to the value of the expression on the right
x += y x = x + y Addition
x -= y x = x – y Subtraction
x *= y x = x * y Multiplication
x /= y x = x / y Division
x %= y x = x % y Modulus
a .= b a = a . b Concatenate two strings

# PHP Incrementing/Decrementing Operators

Operator Name Description
++ x Pre-increment Increments x by one, then returns x
x ++ Post-increment Returns x, then increments x by one
— x Pre-decrement Decrements x by one, then returns x
x — Post-decrement Returns x, then decrements x by one

# PHP Comparison Operators

Operator Name Description Example
x == y Equal True if x is equal to y 5==8 returns false
x === y Identical True if x is equal to y, and they are of same type 5===”5″ returns false
x != y Not equal True if x is not equal to y 5!=8 returns true
x <> y Not equal True if x is not equal to y 5<>8 returns true
x !== y Not identical True if x is not equal to y, or they are not of same type 5!==”5″ returns true
x > y Greater than True if x is greater than y 5>8 returns false
x < y Less than True if x is less than y 5<8 returns true
x >= y Greater than or equal to True if x is greater than or equal to y 5>=8 returns false
x <= y Less than or equal to True if x is less than or equal to y 5<=8 returns true

# PHP Logical Operators

Operator Name Description Example
x and y And True if both x and y are true x=6
y=3
(x < 10 and y > 1) returns true
x or y Or True if either or both x and y are true x=6
y=3
(x==6 or y==5) returns true
x xor y Xor True if either x or y is true, but not both x=6
y=3
(x==6 xor y==3) returns false
x && y And True if both x and y are true x=6
y=3
(x < 10 && y > 1) returns true
x || y Or True if either or both x and y are true x=6
y=3
(x==5 || y==5) returns false
! x Not True if x is not true x=6
y=3
!(x==y) returns true

# PHP Array Operators

Operator Name Description
x + y Union Union of x and y
x == y Equality True if x and y have the same key/value pairs
x === y Identity True if x and y have the same key/value pairs in the same order and are of the same type
x != y Inequality True if x is not equal to y
x <> y Inequality True if x is not equal to y
x !== y Non-identity True if x is not identical to y