php if inside or outside the function

I often get in this situation where I have an if statement and I can't deside where to put it. As a wrapper around the function or inside the function?

Is one of the two solutions here better than the other? If so, why?

Solution 1

function one($something) {
    if( $something === 'yes') {
        two();
    }
}

function two() {
    echo 'ok';
}

one('yes');

Solution 2

function one($something) {
    two($something);
}

function two($something) {
    if( $something === 'yes') {
        echo 'ok';
    }
}

one('yes');