PHP: regular expression to remove bracket codes

I am trying to make a function to remove all the bracket codes but it doesn't seem to be working,

function anti_code($content)
{
    # find the matches and then remove them
    $output = preg_rep开发者_开发百科lace("/\[a-z\s+\]/is", "", $content);

    # return the result
    return $output;
}

I want these codes to be removed in the output,

Agro[space]terrorism
Agro[en space]terrorism

so that I can get

Agroterrorism

I must be something wrong in my regular expression! Please let me know. Thanks.

You escaped the [], but didn't add a second set of unescaped [] to designate a character class. Also, the s is not necessary if you're not using the . metacharacter in your regex.

Try this:

/\[[a-z\s]+\]/i

If you don't care what's between the square brackets and just want to remove everything contained in them, this will do:

/\[[^]]+\]/i

Try \[[a-z\s]+\] It will capture brackets and all contents