如何从函数返回变量？

Question

I am trying to return a variable from a function and print it out. Its displaying unexpected T_STRING right now.... Can someone help?

function reg_word($i){
        $reg_word = "/[^A-Za-z0-9 ]/";
        $i = preg_replace($reg_word, '', $i);
    }

$suggestion = function reg_word($_POST['suggestions']);

    print_r($suggestion);

Answer 1

function reg_word($i){
    $reg_word = "/[^A-Za-z0-9 ]/";
    return preg_replace($reg_word, '', $i);
}

$suggestion = reg_word($_POST['suggestions']);

print_r($suggestion);

You had function keyword before reg_word($_POST['suggestions']); - you don't need it. You need to use return keyword to return something from a function.

Answer 2

You've got one function keyword wrong, try:

function reg_word($i){
        $reg_word = "/[^A-Za-z0-9 ]/";
        $i = preg_replace($reg_word, '', $i);
    }

$suggestion = reg_word($_POST['suggestions']);

    print_r($suggestion);

Answer 3

Wrong function keyword, you do NOT return any value in function.

function reg_word($i){
        $reg_word = "/[^A-Za-z0-9 ]/";
        return preg_replace($reg_word, '', $i); // return added
    }

$suggestion = reg_word($_POST['suggestions']); // here function was

    print_r($suggestion);