~ overflow ~

Problem:

MySQLd 5.0.18 (and some others) will bug on queries with more than 128 joins.

The error issued has nothing todo with the limit, and there’s no var to raising this limit, this is a mysql bug for this specific version.

Solution:

Upgrade.

Sources:

bugs.mysql

Problem:

$var=json_decode($_POST['something']);

echo $var['value'];

returns error: Fatal error: Cannot use object of type stdClass as array

Solution:

echo $var->value;

Problem:

On a simple MSSQL (Microsoft SQL Server) with PHP you get this error:

Warning: mssql_query() [function.mssql-query]: message: Unicode data in a Unicode-only collation or ntext data cannot be sent to clients using DB-Library (such as ISQL) or ODBC version 3.7 or earlier. (severity 16)

and the best, it dosen’t matter if you convert the data to a different type.P>

Solution:

It looks like that mssql library at php can’t handle the ntext objects right, or at least the way you’re calling it is not right, the ONG>wrong way is:

function _connect_mssql() {
global $_msql,$_msql_id;
if (!$_msql_id) {
if ($_msql=mssql_connect(dbserver,dbuser,dbpass)) {
mssql_select_db(db,$_msql) or die("Unable to select database: ".db);
$_msql_id=1;
} else {
die("Couldn’t connect to database");R> }
$_msql_id=1;
}
}
function _qm($sql) {
global $res,$_msql,$_msql_id;
if (!$_msql_id) { _connect_mssql(); }
$res=mssql_query($sql,$_msql);
if (!$res) { die("Error on query: ".$sql); }
}

Those are simple functions to call it without using a class or too much paraphernalia. And it doesn’t work when the table has a ntext column on it, now a function that works with any type of table:P>

function _connect_mssql() {
global $_msql,$_msql_id;
if (!$_msql_id) {
$_msql=new COM("ADODB.Connection");
$_msql->Open("Provider=SQLOLEDB.1;Password=".dbpass.";Persist Security Info=True;User ID=".dbuser.";Initial Catalog=".db.";Data Source=".dbserver);
$_msql_id=1;
}
}
function _qm($sql) {
global $res,$_msql,$_msql_id;
if (!$_msql_id) { _connect_mssql(); }
$res=$_msql->Execute($sql);
if (!$res) { die("Error on query: ".$sql); }
}

$_msql="";$_msql_id=0;

Note that I used a class and ADODB connection instead, this works prefectly.