正则表达式在它们之间有空格时加入数字

Question

我正在尝试构建一个正则表达式，当它们之间有空格时，它们会在字符串中连接数字，例如：

$string = "I want to go home 8890 7463 and then go to 58639 6312 the cinema"

正则表达式应输出：

"I want to go home 88907463 and then go to 586396312 the cinema"

正则表达式可以是python或php语言。

谢谢！

Answer 1

使用前瞻来查看下一个块是否是一组数字并删除尾随空格。这样，它适用于任何数量的集合（我怀疑你可能想要）：

$string = "I want to go home 8890 7463 41234 and then go to 58639 6312 the cinema";

$newstring = preg_replace("/\b(\d+)\s+(?=\d+\b)/", "$1", $string);
// Note: Remove the \b on both sides if you want any words with a number combined.
// The \b tokens ensure that only blocks with only numbers are merged.

echo $newstring;
// I want to go home 8890746341234 and then go to 586396312 the cinema

Answer 2

的Python：

import re
text = 'abc 123 456 789 xyz'
text = re.sub(r'(\d+)\s+(?=\d)', r'\1', text)  # abc 123456789 xyz

这适用于任意数量的连续数字组，中间有任意数量的间距。