PHP 所需的 preg_replace 表达式帮助
尝试从某些文本中删除一些 BBCode。我想使用 PHP preg_replace 函数删除 [img] 和 [/img] 之间的所有内容，例如：
Here is my image[img]http://www.abc.com/image1.jpg[/img] and more text
Match: [img] 后跟任意数量的字符，后跟 [/img]
结果：
Here is my image and more text
谢谢。
Trying to strip some BBCode from some text. I would like to remove everything between a [img] and a [/img], using a PHP preg_replace function, for example:
Here is my image[img]http://www.abc.com/image1.jpg[/img] and more text
Match: [img] followed by any number of characters followed by [/img]
Result:
Here is my image and more text
Thanks.
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首先，找到与您的 BBCode 标记相匹配的模式：
唯一困难的部分是类
[^\]]。\[表示任何左括号，^ 表示 NOT。所以这个类将匹配除[之外的所有内容。您还可以用
.+替换该类并使用 U（不贪婪）选项。现在您已经知道要使用哪种模式了，只需将其替换为...空字符串即可。工作完成了！
这是一个非常基本的正则表达式，理解它并且能够重现它很重要
First, find the pattern that would match your BBCode tag:
The only hard part is the class
[^\]]. The\[means any opening bracket and the ^ means NOT. So this class will match everything that is not a[.You could also replace the class with
.+and use the U (ungreedy) option.Now that you now which pattern to use, you just have to replace it with... an empty string. And the job is done!
This is a very basic regexp, it's important that you understand it and that you are able to reproduce it
将处理
[img]和[/img]之间的所有内容（不区分大小写）will take care of everything between
[img]and[/img](case in-sensitive)不要忘记对内容进行分组，例如 '/[img](.+)[\/img]/i'，因此在替换条件下，您可以引用标签 '
'
don't forget to group your content e.g. '/[img](.+)[\/img]/i', so in you replace condition you can reference the value between the tags '<img src="$1" />'