PHP如何将字符串转换为数字?
我想将这些类型的值,'3'
、'2.34'
、'0.234343'
等转换成数字.在 JavaScript 中我们可以使用 Number()
,但在 PHP 中是否有类似的方法?
I want to convert these types of values, '3'
, '2.34'
, '0.234343'
, etc. to a number. In JavaScript we can use Number()
, but is there any similar method available in PHP?
Input Output
'2' 2
'2.34' 2.34
'0.3454545' 0.3454545
推荐答案
有以下几种方法:
将字符串转换为数字原始数据类型:
Cast the strings to numeric primitive data types:
$num = (int) "10";
$num = (double) "10.12"; // same as (float) "10.12";
对字符串进行数学运算:
Perform math operations on the strings:
$num = "10" + 1;
$num = floor("10.1");
使用 intval()
或 floatval()
:
$num = intval("10");
$num = floatval("10.1");
使用settype()
.
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