实例讲解PHP中number_format()函数的用法

string number_format ( $number, $decimals, $decimalpoint, $sep )

<?php

$num1 = "999999.49";

// 没有小数点参数

echo number_format($num1)."\n";

// 带小数点参数

echo number_format($num1, 3)."\n";

$num2 = "9999999.99";

// 没有小数点参数

//返回整数值

echo number_format($num2)."\n";

//带小数点参数

echo number_format($num2, 3)."\n"; 

// 包含所有四个参数

echo number_format("1000000.99", 3, "#", "GGG");

?>

999,999

999,999.490

10,000,000

9,999,999.990

1GGG000GGG000#990

<?php

$num = "GFG";

echo number_format($num)."\n\n";

echo number_format($num, 3);

?>

PHP Warning:  number_format() expects parameter 1 to be float,

string given in /home/ac476aaecea758334cb8ed146bcbb8f6.php on line 5

PHP Warning:  number_format() expects parameter 1 to be float,

string given in /home/ac476aaecea758334cb8ed146bcbb8f6.php on line 8

<?php

$num = 1000000;

echo number_format($num, 3, ", ");

?>