In this tutorial, I am going to explain php arithmetic and comparison operators. The php operators are the symbols used to allow the users to carry out various operations on variables.
By the end of this tutorial you will be aware of:
Php Operators Types
The php operators are itemized into several types matching variables types, which could be summarized as follow:
Php Arithmetic or Mathematical Operators on Php Numerical Variables:
#
Operation
Operator (Symbol) Method
*
Adding two variables
$x + $y
*
Subtracting two variables
$x - $y
*
Multiplicating two variables
$x * $y
*
Dividing two variables
$x / $y
*
Percentage of first out of second variables
$x % $y
*
Adding one to variable
$x++
*
Subtracting one from variable
$x--
*
Adding more than one to variable
$x+=n
*
Subtracting more than one from variable
$x-=n
Php Comparison Operators on Php Various Type Variables:
#
Operation
Operator (Symbol) Method
*
Two equal variables
$x == $y
*
Two equal variables and of same type
$x === $y
*
Multiplicating two variables
$x * $y
*
Two unequal variables
$x != $y
*
Two unequal variables and not of same type
$x !== $y
*
First variable is less than the second variable
$x < $y
*
First variable is greater than the second variable
$x > $y
*
First variable is less than and equal to the second variable
$x <= $y
*
First variable is greater than and equal to the second variable
$x >= $y
Other Php Operators on Php String Variables:
#
Operation
Operator (Symbol) Method
*
Concatenating or merging two php variables
$x .= $y
*
Declaring php variable from php string variable
$x = "y";
$$x = "value";
same as $y = "value";
$$x = "value";
same as $y = "value";
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References:
- Practical Experience
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