Find keyword to limit within a method/function only not the whole file with sublime or other text editor

Good day,

I am using sublime text editor, is there a way to find a keyword within a specific function/method only?

for example, in my controller User.php, there are multiple functions inside it, now I want to search for a variable '$user_id ' inside the function save() only.. so that if I need to find next, I wouldnt accidentally edit the same variable on my delete() function. this would be useful if the code inside a function long .. any idea or recommendation ? thanks!

function save(){
    
    $user_id = '';
    .......
    .......
    $user_id=0;

}

function delete(){
    
    $user_id = '';
    .........

}

function view(){
    $user_id = 1;

    .........

}

Here is a regex that does the job:

(?:function save\h*\(.*?\)\h*{\R|\G)(?:(?!function)[\s\S])+?\K\$user_id

Explanation:

(?:                     # non capture group
    function save           # literally
    \h*                     # 0 or more horizontal spaces
    \(.*?\)                 # arguments of the function
    \h*                     # 0 or more horizontal spaces
    {                       # literally
    \R                      # any kind of linebreak
  |                       # OR
    \G                      # restart from last match position
)                       # end group
(?:                     # non capture group
    (?!function)            # next word must not be "function"
    [\s\S]                  # any character 
)+?                     # end group, must appear 1 or more times, not greedy
\K                      # forget all we have seen until this position
\$user_id               # expression to be searched

Demo & Explanation