Question

我试图匹配src =＆＃34;网址＆＃34;标签如下：

src="http://3.bp.blogspot.com/-ulEY6FtwbtU/Twye18FlT4I/AAAAAAAAAEE/CHuAAgfQU2Q/s320/DSC_0045.JPG"

基本上，任何在src属性中都有一些bp.blogspot URL的东西。我有以下内容，但它只是部分工作：

preg_match('/src=\"(.*)blogspot(.*)\"/', $content, $matches);

Answer 1

这个接受所有blogspot网址并允许转义引号：

src="((?:[^"]|(?:(?<!\\)(?:\\\\)*\\"))+\bblogspot\.com/(?:[^"]|(?:(?<!\\)(?:\\\\)*\\"))+)"

捕获URL以匹配组1。

您需要在\中使用额外的/（每次出现！）来逃避\和preg_match(…)。

说明：

src=" # needle 1
( # start of capture group
    (?: # start of anonymous group
        [^"] # non-quote chars
        | # or:
        (?:(?<!\\)(?:\\\\)*\\") # escaped chars
    )+ # end of anonymous group
    \b # start of word (word boundary)
    blogspot\.com/ # needle 2
    (?: # start of anonymous group
        [^"] # non-quote chars
        | # or:
        (?:(?<!\\)(?:\\\\)*\\") # escaped chars
    )+ # end of anonymous group
    ) # end of capture group
" # needle 3

Img标签src匹配PHP正则表达式

1 个答案: