S2OJ/uoj/1/app/models/DB.php

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<?php
class DB {
public static function init() {
global $uojMySQL;
@$uojMySQL = mysqli_connect(UOJConfig::$data['database']['host'] . ':3306', UOJConfig::$data['database']['username'], UOJConfig::$data['database']['password'], UOJConfig::$data['database']['database']);
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if (!$uojMySQL) {
echo 'There is something wrong with database >_<.... ' . mysqli_connect_error();
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die();
}
}
public static function escape($str) {
global $uojMySQL;
return mysqli_real_escape_string($uojMySQL, $str);
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}
public static function fetch($r, $opt = MYSQLI_ASSOC) {
global $uojMySQL;
return mysqli_fetch_array($r, $opt);
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}
public static function query($q) {
global $uojMySQL;
return mysqli_query($uojMySQL, $q);
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}
public static function update($q) {
global $uojMySQL;
return mysqli_query($uojMySQL, $q);
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}
public static function insert($q) {
global $uojMySQL;
return mysqli_query($uojMySQL, $q);
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}
public static function insert_id() {
global $uojMySQL;
return mysqli_insert_id($uojMySQL);
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}
public static function delete($q) {
global $uojMySQL;
return mysqli_query($uojMySQL, $q);
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}
public static function select($q) {
global $uojMySQL;
return mysqli_query($uojMySQL, $q);
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}
public static function selectAll($q, $opt = MYSQLI_ASSOC) {
global $uojMySQL;
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$res = array();
$qr = mysqli_query($uojMySQL, $q);
while ($row = mysqli_fetch_array($qr, $opt)) {
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$res[] = $row;
}
return $res;
}
public static function selectFirst($q, $opt = MYSQLI_ASSOC) {
global $uojMySQL;
return mysqli_fetch_array(mysqli_query($uojMySQL, $q), $opt);
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}
public static function selectCount($q) {
global $uojMySQL;
list($cnt) = mysqli_fetch_array(mysqli_query($uojMySQL, $q), MYSQLI_NUM);
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return $cnt;
}
public static function checkTableExists($name) {
global $uojMySQL;
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return DB::query("select 1 from $name") !== false;
}
public static function num_rows() {
global $uojMySQL;
return mysqli_num_rows($uojMySQL);
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}
public static function affected_rows() {
global $uojMySQL;
return mysqli_affected_rows($uojMySQL);
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}
}