字符串操作从字符串中删除标记并将结果分配给变量？

Given the string variable in $widget_text...

$widget_text = '[widget_and-some-text]';

I need to do a string manipulation to end up with...

$widget_text_sanitized = 'and-some-text';

How?

ie, I thought this should work:

$widget_text = trim($widget_text,'[]');
$widget_text_sanitized = str_replace('widget_','',$widget_text);

Using a regular expression, you could have something like this :

$widget_text = '[widget_and-some-text]';

if (preg_match('/\[widget_([^\]]+)\]/', $widget_text, $matches)) {
    var_dump($matches[1]);
}

Which would get you :

string 'and-some-text' (length=13)

$widget_text_sanitised = substr($widget_text, 8, -1);

This will remove the first 8 and the last character from the string (no matter what characters they are).