BBCode 需要 preg_replace 帮助

Question

我不太清楚与 PHP 的 preg_replace 函数一起使用的正确模式。这是 phpBB 论坛上的一些 BBCode 的示例。

[color=black][font=Times New Roman][color=black]Thanks. As discussed last night/this morning, we were able to Cable and provide some small relief. After enough waste water was evacuated, the camera diagnosis found at 30 foot from clean-out, heavy root penetration and possible damage/separation to the line. We don’t want to throw a cost to fix/repair without a second opinion from xxx. We will have solid cost of repair later today of first thin in the morning. [/color][/font][/color]

我想删除可能嵌入文本中的任意数量的开始和结束字体标签，但将文本保留在中间。在这种情况下，我想最终得到：

[color=black][color=black]Thanks. As discussed last night/this morning, we were able to Cable and provide some small relief. After enough waste water was evacuated, the camera diagnosis found at 30 foot from clean-out, heavy root penetration and possible damage/separation to the line. We don’t want to throw a cost to fix/repair without a second opinion from xxx. We will have solid cost of repair later today of first thin in the morning. [/color][/color]

字体的名称各不相同，有些名称中包含空格，有些则没有。无论如何，模式匹配都必须有效。

提前致谢！

Answer 1

如果您只是删除它们，则不需要太复杂的正则表达式...

$str = '[color=black][font=Times New Roman][color=black]Thanks. As discussed last night/this morning, we were able to Cable and provide some small relief. After enough waste water was evacuated, the camera diagnosis found at 30 foot from clean-out, heavy root penetration and possible damage/separation to the line. We don’t want to throw a cost to fix/repair without a second opinion from xxx. We will have solid cost of repair later today of first thin in the morning. [/color][/font][/color]';

$regex = '/\[font=.*?\]|\[\/font\]/i';

$str = preg_replace($regex, '', $str);

var_dump($str);

输出

string(457) "[color=black][color=black]Thanks. As discussed last night/this morning, we were able to Cable and provide some small relief. After enough waste water was evacuated, the camera diagnosis found at 30 foot from clean-out, heavy root penetration and possible damage/separation to the line. We donÕt want to throw a cost to fix/repair without a second opinion from xxx. We will have solid cost of repair later today of first thin in the morning. [/color][/color]"

在 ideone 上查看。