i have got some error in inc.library.php, what is a number_format() expects parameter 1 to be double?

Question

hallo i have some error in inc.library.php

what is a number_format() expects parameter 1 to be double ?

Warning: number_format() expects parameter 1 to be double, string given in /Applications/XAMPP/xamppfiles/htdocs/tes/library/inc.library.php on line 46

Warning: number_format() expects parameter 1 to be double, string given in /Applications/XAMPP/xamppfiles/htdocs/tes/library/inc.library.php on line 46

and i have 2 waring in browser

this code in inc.library.php

function format_angka($angka) {
    $hasil =  number_format($angka,0, ",",".");
    return $hasil;
}

Answer 1

format_number excpects first argument to be a number, not a string. To convert numeric string with decimal points to number you can use function floatval(numberic_string) .

 function format_angka($angka) {
    $hasil =  number_format(floatval($angka),0, ",",".");
    return $hasil;
}