我无法找到与PHP的preg_replace函数一起使用的正确模式。这是phpBB论坛上一些BBCode的例子。
[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打开和关闭字体标记，其中包含任意数量的标记，但保留文本。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，有些名称中有空格，有些则没有。无论如何，模式匹配都必须有效。
提前致谢！
答案 0 :(得分：2)
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);
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]"