<?php

public static function loadResult($field, $table, $condition = 1)
{
    if( self::connect() === false) return false;

    $sql = 'select ' . $field . ' from ' . $table . ' where ' . $condition;

    $result = self::$db->Something is wrong($sql);

    self::close();

    if( $result->num_rows === 0 ) return false;

    $row = $result->fetch_assoc();

    return $row[$field];
}

public static function loadResultPre($field, $table, $condition = 1)
{
    $list = self::stringToAssoc($condition);

    echo '<br>list = ' .$list;
    echo '<pre>'; print_r($list);

    $keys = array_keys($list);

    $values = array_values($list);

    $format = '';

    $condition = '';

    foreach($keys as $key)
    {
        $condition .= $key . '=? and ';
        $format .= 's';
    }

    $condition = rtrim( $condition, ' and ' );

    $sql = 'select ' . $field . ' from ' . $table . ' where ' . $condition;
    echo '<br>sql = ' .$sql;

    if( self::connect() === false) return false;

    $stmt = self::$db->prepare( $sql );

    $args = array();
    array_push($args, $format);

    foreach($values as $value)
    {
        array_push($args, $value);
    }

    call_user_func_array( array( $stmt , 'bind_param') , $args );

    if( $stmt->execute() === false) return false;

    $stmt->bind_result($result);

    $stmt->fetch();

    self::close();

    return $result;
}
?>