Convert a string (1234567890) into (1,234,567,890) with each group of three separated by commas

/**
* Method 1 PHP built-in function
*/
// $str = '1234567890';
// $newstr = number_format($str);
// echo $str;
// echo '
';
// echo $newstr;
/**
* Method 2: PHP’s built-in function implementation
*/
$str = '1234567890'; //The number to be formatted
$count = 3; //Split every few numbers
echo $str;
echo '
';
echo test($str,$count);
function test($str='',$count=3){
if(empty($str ) || $count <= 0){
                                                                            return false; Split the string into an array
        $new_str = join(',',$arr); // Join the string
                                                    out out through ’s
    ’     out out out out out out through out through out through through out through off‐‐to ‐‐‐‐‐‐ and } to split the string into arrays
                     The built-in function


number_format()

$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 without thousands and separator
$english_format_number =
number_format($number, 2, '.', '' );// 1234.57
?>
strrev()

returns

the reversed string.

string

echo

strrev
("Hello world!"); // Output "!dlrow olleH"?>
implode() (alias join())

concatenates the values ​​​​of one-dimensional arrays into a string

$array = array( 'lastname'
, 'email', 'phone');$comma_separated =
implode(", ", $array );echo $comma_separated;
//lastname,email,phone// Empty string when using an empty array:var_dump
(
implode ('hello ', array())); // string(0) ""?>
str_split()

The above introduces how to convert a string (1234567890) into (1,234,567,890). Each group of three is separated by commas, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.