Function

min()

finds the lowest value from its arguments

echo min(10, 15, 7, 9, 17)."\n"; // 7

Function

max()

finds the highest value from its arguments

echo max(10, 15, 7, 9, 17)."\n"; // 17

Function

count()

counts all elements in the array

echo count([10, 15, 7, 9, 17])."\n";

Function

round()

rounds a floating-point number to its nearest integer

echo(round(0.75))."\n";  // returns 1
echo(round(0.5))."\n";  // returns 1
echo(round(0.49))."\n";  // returns 0

Function

floor()

rounds the floating-point number down

echo floor(3.3)."\n";// 3  
echo floor(7.84)."\n";// 7 
echo floor(-4.8)."\n";// -5  

Function

ceil()

rounds the floating-point number up

echo ceil(3.3)."\n";// 4
echo ceil(7.84)."\n";// 8
echo ceil(-4.8)."\n";// -4

Function

rand()

generates a random number

echo rand()."\n";
// Generates a random number from the range
echo rand(10, 100)."\n";

Function

sqrt()

returns the square root of a number

echo sqrt(64)."\n";  // 8

Function

pow()

raises 2 to the power of 3

echo pow(2, 3)."\n";  // 8

Function

pi()

Returns PI value

echo pi()."\n";// 3.1415926535898

Function

abs()

returns the positive (absolute) value of a number

echo abs(-12)."\n";

Function

decbin()

converts decimal number into binary

echo decbin(2)."\n";// 10