The is_float() function is a built-in function in PHP that checks whether a variable is a float or not. A float is a data type that represents a decimal number.


The syntax of the is_float() function is as follows:

bool is_float(mixed $var)

The function takes a single parameter, $var, which is the variable to be checked for being a float. The function returns true if the variable is a float, and false otherwise.

Example Usage

Here is an example of how to use the is_float() function in PHP:

$var1 = 3.14;
$var2 = 42;
echo is_float($var1) . "\n";  // output: 1 (true)
echo is_float($var2) . "\n";  // output: (false)

In this example, we define two variables: $var1 is a float with the value of 3.14, and $var2 is an integer. We then use the is_float() function to check whether each variable is a float. The output shows that $var1 is a float (true), while $var2 is not a float (false).


The is_float() function is a useful tool for checking whether a variable is a float in PHP. It can be used to ensure that a variable is of the expected type before performing operations on it, or to handle floats and non-floats in a particular way. By using this function, developers can ensure that their code is working with the correct data types and avoid errors that may occur when working with mixed data types.

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