<?php
/* determine the difference between the user supplied string and the one in the database based on the contained characters */
function char_compare($db_str, $user_str) {
    return similar_text($db_str, $user_str);
}

$db = new SQLiteDatabase("server-php-sqlite-demo.db");

/* Create char_compare() function inside SQLite based on our PHP function, char_compare(). The 3rd parameter indicates how many arguments the function requires */
$db->createFunction('char_compare', 'char_compare', 2);
        
/* Execute query, where char_compare() is used to perform the string comparison between name & specified string */
$res = $db->arrayQuery("SELECT name, char_compare(name, 'Il2') AS sim_index FROM foo", SQLITE_ASSOC);

print_r($res);

?>