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一个字符串中，例如:
$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。
谢谢!
最佳答案
使用前瞻来查看下一个 block 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):
$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
关于php - 正则表达式在它们之间有空格时加入数字，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6929981/