How to change mysql to mysqli?

Question

Based on this code below I use for regular mysql, how could I convert it to use mysqli?

Is it as simple as changing mysql_query($sql); to

Answer 1

I have just created the function with the same names to convert and overwrite to the new one php7:

$host =     "your host";      
$un = "username";    
$pw = "password";       
$db = "database"; 

$MYSQLI_CONNECT = mysqli_connect($host, $un, $pw, $db);

function mysql_query($q) {
    global $MYSQLI_CONNECT;
    return mysqli_query($MYSQLI_CONNECT,$q);
}

function mysql_fetch_assoc($q) {
    return mysqli_fetch_assoc($q);
}

function mysql_fetch_array($q){
    return mysqli_fetch_array($q , MYSQLI_BOTH);
}

function mysql_num_rows($q){
    return mysqli_num_rows($q);
}

function mysql_insert_id() {
    global $MYSQLI_CONNECT;
    return mysqli_insert_id($MYSQLI_CONNECT);
}

function mysql_real_escape_string($q) {
    global $MYSQLI_CONNECT;
    return mysqli_real_escape_string($MYSQLI_CONNECT,$q);
}

It works for me , I hope it will work for you all , if I mistaken , correct me.