$n = 5;
$n = number_format($n, 2, . , );
您应该尝试 number_format () :
$your_number = 5;
echo number_format($your_number, 2); // displays 5.00
"https://www.php.net/manual/en/form.number-format.php" rel=“不跟随 nofollow noreferrer" > 手册
number_format( your digit , 2 or 1, . , );
$number = 125
$no = number_format($number, 2, . , );
output = 125.00
$x = 5;
$x = sprintf( %.2f , $x);
echo $x;
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