This solution will teach us how to add commas to numbers.
solution 1.
Assuming the english format solution
<?php
$number = 1234.56;
// english notation (default)
$english_format_number = number_format($number);
// 1,235
// French notation
$nombre_format_francais = number_format($number, 2, ',', ' ');
// 1 234,56
$number = 1234.5678;
// english notation with a decimal point and without thousands seperator
$english_format_number = number_format($number, 2, '.', '');
// 1234.57
?>solution 2.
The following code may be helpful.
$number = 1234.56;
echo number_format($number, 2, '.', ',');//1,234.56
Output
