#27358 [Opn->Bgs]: Variable assignment produces errors
ID: 27358
User updated by: mail at iaindooley dot com
Reported By: mail at iaindooley dot com
-Status: Open
+Status: Bogus
Bug Type: Variables related
Operating System: FreeBSD 4.7
PHP Version: 4.3.4
New Comment:
crazy pills. no bug. sorry... long live PHP!
Previous Comments:
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[2004-02-23 00:05:11] mail at iaindooley dot com
Description:
------------
i'm sorry if this bug report sounds strange, but this is a very strange
bug. if it is indeed a bug. a problem with this is that in order to
reproduce the bug you would have to install all the ancestor classes to
run the code, but i think you will get a good idea of what is going
wrong from my description below. basically, this method is part of a
DBSelectQuery class that is just a convenience class for building
database queries on the fly. The particular method in question is being
used in many many other places without errors.
Reproduce code:
---------------
/**
* Add a clause to this query
* @param clause - a DBClause object
*/
function setClause($db_clause)
{
if($db_clause!="")
{
$str = $db_clause->toString();
$this->clause = $str;
}
}
Expected result:
----------------
the expected result would be that the member variable 'clause' of the
query object would now have the value of the $db_clause object's
toString() method.
Actual result:
--------------
if the code is executed as it is above, i get the error:
Fatal error: Call to a member function on a non-object in
/usr/home/iain/public_html/sitekitchen/classes/db/dbselectquery.class.inc
on line 101
Line 101 is the line with the call:
$str = $db_clause->toString();
So one would assume that $db_clause is somehow not an object. However,
if i comment out the line that assigns the variable $str to
$this->clause, then there is no error. ie. the code now looks like
this:
/**
* Add a clause to this query
* @param clause - a DBClause object
*/
function setClause($db_clause)
{
if($db_clause!="")
{
$str = $db_clause->toString();
echo($str);
//$this->clause = $str;
}
}
And i get the following printed out to the screen:
WHERE functionid = '34'
which is the expected result of the $db_clause object's toString()
method, so it is clearly an object.
Please bare in mind here, that the 'Call to a member function on a
non-object" error is _not_ occuring on the line that i have commented
out above. Commenting out this line prevents the error from occuring in
the _previous_ line!!!
also, if i assign some other random string to $this->clause, ie. the
code now looks like this:
/**
* Add a clause to this query
* @param clause - a DBClause object
*/
function setClause($db_clause)
{
if($db_clause!="")
{
$str = $db_clause->toString();
echo($str);
$this->clause = "some random string";
}
}
then the code is fine (apart from the fact that the database query
doesn't work because it has the words "some random string" instead of a
where clause!)
i am also able to assign the variable $str to some other random
variable, ie:
/**
* Add a clause to this query
* @param clause - a DBClause object
*/
function setClause($db_clause)
{
if($db_clause!="")
{
$str = $db_clause->toString();
$some_random_variable = $str;
echo($str."<br>".$some_random_variable);
$this->clause = "some random string";
}
}
this gives the expected output:
WHERE functionid = '34'
WHERE functionid = '34'
i seriously feel like i am taking crazy pills. if you need some more
info, let me know.
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