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<?php # $Id: mysql.inc.php 565 2005-10-17 13:04:11Z garvinhicking $
# Copyright (c) 2003-2005, Jannis Hermanns (on behalf the Serendipity Developer Team)
# All rights reserved. See LICENSE file for licensing details
function serendipity_db_begin_transaction(){
serendipity_db_query('start transaction');
}
function serendipity_db_end_transaction($commit){
if ($commit){
serendipity_db_query('commit');
}else{
serendipity_db_query('rollback');
}
}
function serendipity_db_in_sql($col, &$search_ids) {
return $col . " IN (" . implode(', ', $search_ids) . ")";
}
/* Issues a query to the underlying database;
* returns:
* false if there was an error,
* true if the query succeeded but did not generate any rows
* array of field values if it returned a single row and $single is true
* array of array of field values if it returned row(s)
*/
function &serendipity_db_query($sql, $single = false, $result_type = "both", $reportErr = false, $assocKey = false, $assocVal = false, $expectError = false) {
global $serendipity;
static $type_map = array(
'assoc' => MYSQL_ASSOC,
'num' => MYSQL_NUM,
'both' => MYSQL_BOTH,
'true' => true,
'false' => false
);
// highlight_string(var_export($sql, 1));
if ($expectError) {
$c = @mysql_query($sql, $serendipity['dbConn']);
} else {
$c = mysql_query($sql, $serendipity['dbConn']);
}
if (!$expectError && mysql_error($serendipity['dbConn']) != '') {
$msg = '<pre>' . $sql . '</pre> / ' . mysql_error($serendipity['dbConn']);
return $msg;
}
if (!$c) {
if (!$expectError && !$serendipity['production']) {
print '<pre>' . $sql . '</pre> / ' . mysql_error($serendipity['dbConn']);
if (function_exists('debug_backtrace') && $reportErr == true) {
highlight_string(var_export(debug_backtrace(), 1));
}
}
return $type_map['false'];
}
if ($c === true) {
return $type_map['true'];
}
$result_type = $type_map[$result_type];
switch(mysql_num_rows($c)) {
case 0:
if ($single) {
return $type_map['false'];
}
return $type_map['true'];
case 1:
if ($single) {
return mysql_fetch_array($c, $result_type);
}
default:
if ($single) {
return mysql_fetch_array($c, $result_type);
}
$rows = array();
while (($row = mysql_fetch_array($c, $result_type))) {
if (!empty($assocKey) && !empty($assocVal)) {
// You can fetch a key-associated array via the two function parameters assocKey and assocVal
$rows[$row[$assocKey]] = $row[$assocVal];
} else {
$rows[] = $row;
}
}
return $rows;
}
}
function serendipity_db_insert_id() {
global $serendipity;
return mysql_insert_id($serendipity['dbConn']);
}
function serendipity_db_affected_rows() {
global $serendipity;
return mysql_affected_rows($serendipity['dbConn']);
}
function serendipity_db_updated_rows() {
global $serendipity;
preg_match(
"/^[^0-9]+([0-9]+)[^0-9]+([0-9]+)[^0-9]+([0-9]+)/",
mysql_info(),
$arr);
// mysql_affected_rows returns 0 if rows were matched but not changed.
// mysql_info returns rows matched AND rows changed
return $arr[2];
}
function serendipity_db_matched_rows() {
global $serendipity;
preg_match(
"/^[^0-9]+([0-9]+)[^0-9]+([0-9]+)[^0-9]+([0-9]+)/",
mysql_info(),
$arr);
// mysql_affected_rows returns 0 if rows were matched but not changed.
// mysql_info returns rows matched AND rows changed
return $arr[1];
}
function serendipity_db_escape_string($string) {
return mysql_escape_string($string);
}
function serendipity_db_limit($start, $offset) {
return $start . ', ' . $offset;
}
function serendipity_db_limit_sql($limitstring) {
return ' LIMIT ' . $limitstring;
}
function serendipity_db_connect() {
global $serendipity;
if (isset($serendipity['dbConn'])) {
return $serendipity['dbConn'];
}
if (isset($serendipity['dbPersistent']) && $serendipity['dbPersistent']) {
$function = 'mysql_pconnect';
} else {
$function = 'mysql_connect';
}
$serendipity['dbConn'] = $function($serendipity['dbHost'], $serendipity['dbUser'], $serendipity['dbPass']);
mysql_select_db($serendipity['dbName']);
return $serendipity['dbConn'];
}
function serendipity_db_schema_import($query) {
static $search = array('{AUTOINCREMENT}', '{PRIMARY}',
'{UNSIGNED}', '{FULLTEXT}', '{FULLTEXT_MYSQL}', '{BOOLEAN}');
static $replace = array('int(11) not null auto_increment', 'primary key',
'unsigned' , 'FULLTEXT', 'FULLTEXT', 'enum (\'true\', \'false\') NOT NULL default \'true\'');
static $is_utf8 = null;
global $serendipity;
if ($is_utf8 === null) {
$search[] = '{UTF_8}';
if ( (isset($_POST['charset']) && $_POST['charset'] == 'UTF-8/') ||
$serendipity['charset'] == 'UTF-8/' ||
$serendipity['POST']['charset'] == 'UTF-8/' ||
LANG_CHARSET == 'UTF-8' ) {
$replace[] = '/*!40100 CHARACTER SET utf8 COLLATE utf8_unicode_ci */';
} else {
$replace[] = '';
}
}
$query = trim(str_replace($search, $replace, $query));
if ($query{0} == '@') {
// Errors are expected to happen (like duplicate index creation)
return serendipity_db_query(substr($query, 1), false, 'both', false, false, false, true);
} else {
return serendipity_db_query($query);
}
}
/* probes the usability of the DB during installation */
function serendipity_db_probe($hash, &$errs) {
global $serendipity;
if (!function_exists('mysql_connect')) {
$errs[] = 'No mySQL extension found. Please check your webserver installation or contact your systems administrator regarding this problem.';
return false;
}
if (!($c = @mysql_connect($hash['dbHost'], $hash['dbUser'], $hash['dbPass']))) {
$errs[] = 'Could not connect to database; check your settings.';
$errs[] = 'The mySQL error was: ' . mysql_error();
return false;
}
$serendipity['dbConn'] = $c;
if (!@mysql_select_db($hash['dbName'])) {
$errs[] = 'The database you specified does not exist.';
$errs[] = 'The mySQL error was: ' . mysql_error();
return false;
}
return true;
}
function serendipity_db_concat($string) {
return 'concat(' . $string . ')';
}
/* vim: set sts=4 ts=4 expandtab : */
?>
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