使用正则表达式从字符串中获取数字

Question

I am trying to write a regex to get the numbers from strings like these ones:

javascript:ShowPage('6009',null,null,null,null,null,null,null)
javascript:BlockLink('2146',null,null,null)

I am having difficulty writing the regex to grab these numbers.

How should I do this?

Answer 1

Try this:

(\d+)

What language are you using to parse these strings?

If you let me know I can help you with the code you would need to use this regular expression.

Answer 2

Assuming:

• you want to capture the digits
• there's only one set of digits per line

Try this:

/(\d+)/

then $1 (Perl) or $matches[1] (PHP) or whatever your poison of choice is, should contain the digits.

Answer 3

整数或浮点数：

/\d+((.|,)\d+)?/

Answer 4

只匹配数字：\\d+

Answer 5

// PHP

$string = 'ssss 12.2';
$pattern = '/\D*(\d+)(.|,)?(\d+)?\D*/';

$replacement = '$1.$3';

$res = (float)preg_replace($pattern, $replacement, $string);

// output 12.2