javascript PHP 中 JS: something.toFixed() 的确切等价物是什么？
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What is the exact equivalent of JS: something.toFixed() in PHP?
提问by user111671
If I have a.toFixed(3);in javascript ('a' being equal to 2.4232) what is the exact equivalent command in php to retrieve that? I searched for it but found no proper explanation appended to the answers.
如果我 a.toFixed(3);在 javascript（'a' 等于 2.4232）中有什么是 php 中完全等效的命令来检索它？我搜索了它，但没有找到正确的解释附加到答案中。
采纳答案by D?nu? Mihai Florian
I found that sprintfand number_formatboth round the number, so i used this:
我发现了，sprintf并且number_format都四舍五入，所以我使用了这个：
$number = 2.4232;
$decimals = 3;
$expo = pow(10,$decimals);
$number = intval($number*$expo)/$expo; // = 2423/100
回答by cassiodoroVicinetti
The exact equivalent command in PHP is function number_format:
PHP 中完全等效的命令是函数number_format：
number_format($a, 3, '.', ""); // 2.423
- it rounds the number to the third decimal place
- it fills with '0' characters if needed to always have three decimal digits
- 它将数字四舍五入到小数点后第三位
- 如果需要总是有三个十进制数字，它会用“0”字符填充
Here is a practical function:
这是一个实用的功能：
function toFixed($number, $decimals) {
return number_format($number, $decimals, '.', "");
}
toFixed($a, 3); // 2.423
回答by Shafiq Jetha
Have you tried this:
你有没有试过这个：
round(2.4232, 2);
This would give you an answer of 2.42.
这会给你 2.42 的答案。
More information can be found here: http://php.net/manual/en/function.round.php
更多信息可以在这里找到：http: //php.net/manual/en/function.round.php
回答by Jon
A direct equivalent is sprintf('%.03F', $a). This will format the value in question as a number with 3 decimal digits. It will also round if required.
一个直接的等价物是sprintf('%.03F', $a)。这会将有问题的值格式化为带有 3 个十进制数字的数字。如果需要，它也会四舍五入。
回答by oabarca
Here is the translation:
这是翻译：
function toFixed($number, $dec_length){
$pos=strpos($number.'', ".");
if($pos>0){
$int_str=substr($number,0,$pos);
$dec_str=substr($number, $pos+1);
if(strlen($dec_str)>$dec_length){
return $int_str.($dec_length>0?'.':'').substr($dec_str, 0,$dec_length);
}else{
return $number;
}
}else{
return $number;
}
}
//toFixed(1234.678, 0) = 1234
//toFixed(1234.678, 1) = 1234.6
//toFixed(1234.678, 2) = 1234.67
//toFixed(1234.678, 4) = 1234.678
回答by Afia
The straight forward solution is to use in php is number_format()
直接的解决方案是在 php 中使用 number_format()
number_format(2.4232, 3);
