Float number as function parameter in PHP

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PHP

Parameter

Hi,

I am trying to send a float number as a function parameter in php.
For example I have the following function:

function my_function($my_float = 0.001) {
    
    print_r($my_float);

}

When print_r is executed I get the value of 100 not 0.001.

Why is this happening and how can I keep the value unchanged?

Thank you,
Radu-Stefan