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PHP Math Functions


PHP Math:

Math functions and constants are already defined in the PHP library which can be used to perform mathematical calculations.

PHP Math Functions:

PHP provides various math functions including;

abs() function:
This function is used to get an absolute value of a number.
Syntax:

number abs ( mixed $number )

ceil() function:
This function is used to get a round up value.

Syntax:

float ceil ( float $value )

floor() function:
This function is used to get a round down value.

Syntax:

float floor ( float $value )

sqrt() function:
This function is used to get the square root of a number.

Syntax:

float sqrt ( float $arg )

decbin() function:
This function is used to convert a decimal number into binary.

Syntax:

string decbin ( int $number )

dechex() function:
This function is used to convert a decimal number into hexadecimal.

Syntax:

string dechex ( int $number )

decoct() function:
This function is used to convert a decimal number into octal.

Syntax:

string decoct ( int $number )

base_convert() function:
This function is used to convert a base number to any other base number (hexadecimal number to binary, binary to octal, etc.)

Syntax:

string base_convert ( string $number , int $frombase , int $tobase )

bindec() function:
This function is used to convert a binary number into decimal.

Syntax:

number bindec ( string $binary_string )

There are numerous other functions defined by PHP which are used to perform mathematical operations. Some of the MOST USED string functions are listed below:

FUNCTION USES
abs() It is used to find the absolute (positive) value of a number.
sin() It is used to return the sine of a number.
cos() It is used to find the cosine of a number.
tan() It is used to return the tangent of a number.
base_convert() It is used to convert a number from one number base to another.
bindec() It is used to convert a binary number to a decimal number.
ceil() It is used to find round a number up to the nearest integer.
pi() It returns the approximation value of PI.
decbin() It converts a decimal number to a binary number.
dechex() It converts a decimal number to a hexadecimal number.
decoct() It converts a decimal number to an octal number
deg2rad() It converts a degree value to a radian value.
rad2deg() It converts a radian value to a degree value.
exp() It is used to calculate the exponent of e
min() It returns the lowest value in an array, or the lowest value of several specified values.
max() It is used to return the highest value in an array, or the highest value of several specified values.
pow() It is used to return x raised to the power of y.
rand() It is used to generates a random integer.
round() It is used to round a floating-point number.
sqrt() It is used to return the square root of a number.

 

PHP Math Constants:

PHP provides various math constants, for example;

  • INF: INF represents infinite and the value of this constant is infinite.
  • M_E: M_E is used to return e and the value of this constant is 2.7182818284590452354.
  • M_EULER: M_EULER is used to return Euler constant and the value of this constant is 0.57721566490153286061.

Example

<!DOCTYPE html>
<html>
<body>
 
<?php  
echo "absolute value<br/>";
echo (abs(-7)."<br/>");
 
echo "round up value<br/>";
echo (ceil(7.333)."<br/>");
 
echo "round down value<br/>";
echo (floor(7.333)."<br/>");
 
echo "square root<br/>";
echo (sqrt(25)."<br/>");
 
echo "decimal to binary<br/>";
echo (decbin(2)."<br/>");
 
echo "decimal to hex<br/>";
echo (dechex(10)."<br/>");
 
echo "decimal to octal<br/>";
echo (decoct(10)."<br/>");
 
echo "base conversion<br/>";
$n1=10;  
echo (base_convert($n1,10,2)."<br/>");
 
echo "binary to decimal<br/>";
echo (bindec(1010)."<br/>");
?>
 
</body>
</html>

Output

absolute value
7
round up value
8
round down value
7
square root
5
decimal to binary
10
decimal to hex
a
decimal to octal
12
base conversion
1010
binary to decimal
10
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