[英]How to add leading zeros and commas to a number in PHP
我有一個變量$counter
,它返回以下整數:
4
我想使用數字格式或類似的方式使我的整數以這種格式出現:
000,000,004
我怎么能這樣做?
您可以像這樣一起使用sprintf()
和str_split()
:
$number = 4;
$formattedNumber = sprintf("%09d", $number);
$formattedNumber = str_split($formattedNumber, 3);
$formattedNumber = implode(",", $formattedNumber);
echo $formattedNumber;
以下是使用str_pad()
的上述代碼的殺手級變體:
function formatNumber($number, $desiredLength, $separatorLength) {
$formattedNumber = str_pad($number, $desiredLength, "0", STR_PAD_LEFT);
while(strlen($formattedNumber) % $separatorLength){
$formattedNumber = " " . $formattedNumber;
}
$formattedNumber = str_split($formattedNumber, $separatorLength);
$formattedNumber = implode(",", $formattedNumber);
return trim($formattedNumber);
}
echo formatNumber( 4, 9, 3); // 000,000,004 -- fixed width
echo formatNumber(4000000000, 9, 3); // 4,000,000,000 -- fixed width; overflow handled automatically
echo formatNumber( 4, 0, 3); // 4 -- no width specified
echo formatNumber( 4000, 0, 3); // 4,000 -- no width specified; comma added automatically
你可以使用str_pad函數:
str_pad((4,2,"0",STR_PAD_LEFT);
$string = "4";
echo str_pad($string, 9, "0", STR_PAD_LEFT); // prints "000000004" (9-digit number)
/*
9 = How long the returned value should be. Must be bigger than length of $string
0 = String to add
STR_PAD_LEFT = On which side to add zeros? Left, in the case
*/
$number = 1;
echo number_format($number / 1000, 3, ",", "."); // 2 decimals, "," and "." as seperators
// gives 0,001
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