php - Apache crashing while using Zend Framework -


i have been studying zend framework, have ran problem.

apache crashes when run :

$this->db->fetchall("select count(distinct userid) numberofusers, count(id) total notebook")

but,this don't happen if run

$this->db->fetchall("select count(distinct userid) numberofusers notebook")

or

$this->db->fetchall("select count(id) total notebook")

error log :

--------------------------- apache.exe - application error --------------------------- "0x019b250a" instruction references of "0x00000000" memory。this memory can't "read"。 termination procedure, please click "ok". should debug program, please click "cancel". --------------------------- ok cancel    ---------------------------

i don't know why happens. problem version of php running. (currently running php 5.2.8). can me?

it's because of php version or configuration.first,checking version.secord,checking configuration of 'php.ini',then restart apache.


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