PHP ceil() Function

Definition and Usage

The ceil() function is an in-built function in PHP iterpreter. This function accepts any float number as argument and rounds it up to the next highest integer.

This function always returns a float number as range of float is bigger than that of integer.

Syntax

ceil ( float $num ) : float

Parameters

Return Values

PHP ceil() function returns the smallest integer value that is bigger than or equal to given parameter.

PHP Version

This function is available in PHP versions 4.x, PHP 5.x as well as PHP 7.x.

Example

 Live Demo

Following example rounds 5.78 to its next highest integer which is 6

<?php
   $arg=5.78;
   $val=ceil($arg);
   echo "ceil(" . $arg . ") = " . $val;
?>

Output

This will produce following result −

ceil(5.78) = 6

Example

 Live Demo

Following example shows that next highest integer to 15.05 is 16.−

<?php
   $arg=15.05;
   $val=ceil($arg);
   echo "ceil(" . $arg . ") = " . $val;
?>

Output

This will produce following result −

ceil(15.05) = 16

Example

 Live Demo

The ceil() function returns 0 for a string parameter −

<?php
   $arg="Hello";
   $val=ceil($arg);
   echo "ceil(" . $arg . ") = " . $val;
?>

Output

This will produce following result −

ceil(Hello) = 0

Example

 Live Demo

For negative number, it is rounded towards 0 −

<?php
   $arg=-3.95;
   $val=ceil($arg);
   echo "ceil(" . $arg . ") = " . $val;
?>

Output

This will produce following result −

ceil(-3.95) = -3