正则表达式在数字之间有空格时加入数字 [英] Regex to join numbers when they have spaces between them

问题描述

我正在尝试构建一个正则表达式，当它们之间有空格时，将数字连接到字符串中，例如:

I'm trying to build a regex that joins numbers in a string when they have spaces between them, ex:

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

正则表达式应该输出:

"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.

The regex can be either in python or php language.

谢谢！

推荐答案

使用先行查看下一个块是否是一组数字并删除尾随空格.这样，它适用于任意数量的集合(我怀疑你可能想要):

Use a look-ahead to see if the next block is a set of numbers and remove the trailing space. That way, it works for any number of sets (which I suspected you might want):

$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

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