PHP正则表达式在字符串的开头查找任何数字 [英] PHP Regex to Find Any Number at the Beginning of String

问题描述

我正在使用 PHP，希望能够创建一个正则表达式来查找并返回地址的街道号码部分.

I'm using PHP, and am hoping to be able to create a regex that finds and returns the street number portion of an address.

示例:

1234- 南大道.华盛顿特区，APT #306，ZIP45234

1234- South Blvd. Washington D.C., APT #306, ZIP45234

在上面的例子中，只会返回 1234.

In the above example, only 1234 would be returned.

看起来这应该非常简单，但我还没有成功.任何帮助将不胜感激.

Seems like this should be incredibly simple, but I've yet to be successful. Any help would be greatly appreciated.

推荐答案

试试这个:

$str = "1234- South Blvd. Washington D.C., APT #306, ZIP4523";
preg_match("~^(\d+)~", $str, $m);
var_dump($m[1]);

输出:

string(4) "1234"

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