字符串末尾的匹配号 [英] Match number at the end of the string

问题描述

给出以下字符串，我如何匹配其末尾的整个数字?

Given the following string how can I match the entire number at the end of it?

$string = "Conacu P PPL Europe/Bucharest 680979";

我必须告诉您字符串的长度不是恒定的.

I have to tell that the lenght of the string is not constant.

我选择的语言是PHP.

My language of choice is PHP.

谢谢.

推荐答案

您可以将正则表达式与 preg_match ，就像这样:

You could use a regex with preg_match, like this :

$string = "Conacu P PPL Europe/Bucharest 680979";

$matches = array();
if (preg_match('#(\d+)$#', $string, $matches)) {
    var_dump($matches[1]);
}

然后您会得到:

string '680979' (length=6)

以下是一些信息:

• 正则表达式开头和结尾的#是定界符-它们没有任何意义:它们仅表示正则表达式的开头和结尾；并且您可以使用任何想要的字符(人们经常使用/)
• 模式结尾处的'$'表示字符串结尾"
• ()表示您想捕获它们之间的内容
  • 使用preg_match，作为第三个参数给出的数组将包含那些捕获的数据
  • 该数组中的第一项将是整个匹配的字符串
  • ，接下来的将包含在一组()
  中匹配的每个数据
  • The # at the beginning and the end of the regex are the delimiters -- they don't mean anything : they just indicate the beginning and end of the regex ; and you could use whatever character you want (people often use / )
  • The '$' at the end of the pattern means "end of the string"
  • the () means you want to capture what is between them
    • with preg_match, the array given as third parameter will contain those captured data
    • the first item in that array will be the whole matched string
    • and the next ones will contain each data matched in a set of ()

    所以:

    • 匹配一个或多个数字
    • 在字符串末尾

    有关更多信息，请查看 PCRE模式和 Pattern Syntax .

    For more information, you can take a look at PCRE Patterns and Pattern Syntax.

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