Question

我需要匹配图像文件的部分文件名。我有两种类型：

img000-size.jpg img000.jpg

我怎么才能匹配img000？

PS：我能用preg_match获取php代码吗？感谢

Answer 1

好的，让我帮你......

正则表达式：/(\w+)(?:-\w+)?\.jpg/i

数据：477547755-large.jpg

匹配：477547755

我匹配1和无限次之间的单词字符，而不是可选的减号，再单词字符，然后是扩展名。 注意：您必须在扩展名处转义点，因为它将被解释为“任何字符”

描述：

    1st Capturing group (\w+)
        \w+ match any word character [a-zA-Z0-9_]
            Quantifier: + Between one and unlimited times, as many times as possible, giving back as needed [greedy]
    (?:-\w+)? Non-capturing group
        Quantifier: ? Between zero and one time, as many times as possible, giving back as needed [greedy]
        - matches the character - literally
        \w+ match any word character [a-zA-Z0-9_]
            Quantifier: + Between one and unlimited times, as many times as possible, giving back as needed [greedy]
    \. matches the character . literally
    jpg matches the characters jpg literally (case insensitive)
    i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])

Regexp破折号或点

1 个答案:

REGEX101