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Problem reading exception stack (using 5b3)

php.internals

Markus Fischer

22 years ago

From my current tests I get the following stack:

[23-Dec-2003 01:55:10] PHP Fatal error:  Uncaught exception 'exception' with message 'Unable to connect to database; mysql_error = Unknown MySQL Server Host 'bla' (4)' in /home/mfischer/php/System.php:12
Stack trace:
#0 /home/mfischer/php/Database/MySQL.php(30): mysql->mysql_connect('bla', '', '')
#1 /home/mfischer/htdocs/php5/test.php(5): mysql->connect('hostname=bla')
#2 {main}
thrown in /home/mfischer/php/System.php on line 12

However, the code flow is as the following:

1) /home/mfischer/htdocs/php5/test.php(5):

$db->connect("hostname=bla");

'connect' method of object '$db' is called; not of object
'$mysql' (only the class is called mysql)

2) /home/mfischer/php/Database/MySQL.php(30):

$this->resource = System::mysql_connect($this->hostname, $this->username, $this->password);

The static method 'mysql_connect' of the 'System' class is
called (and not mysql->mysql_connect);

3) /home/mfischer/php/System.php(12):

throw new Exception("Unable to connect to database$mysql_error");


So, for me it seems that
a) the order of the stack is not right (0->1->2 should be 1->0->2)
b) the called function on the stack doesn't reassemble the real
names. In #1 it should be $db->connect and in #0 it should be
System::mysql_connect;


Any ideas about this?

- Markus

Markus Fischer

22 years ago

Maybe some more information about how my code files are layed out
may be helpful.

/home/mfischer/htdocs/php5/test.php

This is my test script which is executed via apache.
It includes the file 'Database/MySQL.php'.

/home/mfischer/php/Database/MySQL.php

Includes the files 'Database/DatabaseInterfaces.php' and
'System.php'.

/home/mfischer/php/Database/DatabaseInterfaces.php

Provides 'interface DatabaseInterface' and 'interface
DatabaseResultInterface'.

/home/mfischer/php/System.php

Contains the class 'System' which only has static methods which
wrap 1:1 with PHP (native) functions but providing Exceptions in
case of errors.


So, my code flow until the exception is thrown is:

test.php(5) calls $db->connect()
Database/MySQL.php(30) calls System::mysql_connect()
System.php(12) throws the Exception

However, the stacktrace reported from PHP reads:
[23-Dec-2003 01:55:10] PHP Fatal error:  Uncaught exception 'exception' with message 'Unable to connect to database; mysql_error = Unknown MySQL Server Host 'bla' (4)' in /home/mfischer/php/System.php:12
Stack trace:
#0 /home/mfischer/php/Database/MySQL.php(30): mysql->mysql_connect('bla', '', '')
#1 /home/mfischer/htdocs/php5/test.php(5): mysql->connect('hostname=bla')
#2 {main}
thrown in /home/mfischer/php/System.php on line 12


My problem is (in order of priority):

1) the order in the trace is not correct
2) the called methods do not match my code

regards,

- Markus