是否存在基于实际值和最大值自动设置特定零数的本机函数？

Question

Is there any native PHP function which would allow me to do this?

$number = functionName(1, 9999); // $number == 0001
$number = functionName(10, 99); // $number == 10
$number = functionName(10, 999); // $number == 010

If there isn't native function, is there any user-based function?

Answer 1

echo str_pad($value, strlen($max), "0", STR_PAD_LEFT);

for example

$value = 10;
$max = 999;
echo str_pad($value, strlen($max), "0", STR_PAD_LEFT);
// returns 010

See http://ideone.com/KPBV2 and str_pad()