I have:
1) interbase 6.01
2) php-4.0.5 
3) apache 1.3.19 and .20
4) windows98 First edition

This string:

$var2 = ibase_blob_open($array[0]);

where $array[0] is the result of:

while($i <= $x) {
	$array = ibase_fetch_row($queryres);
	$i = $i + 1;
}

crash apache server ONLY under windows environment. I have also tried the same thing under linux 2.2.19 with apache 1.3.19 and php-4.0.5 but appear to be ok.

php.ini:

All default except:
extension dir (obviously :))
file_uploads = Off
extension=php_interbase.dll
extension=php_zlib.dll

This is the windows error:

APACHE ha provocato un errore di pagina non valida nel
modulo GDS32.DLL in 0177:4053ae97.
Registri:
EAX=00000013 CS=0177 EIP=4053ae97 EFLGS=00010203
EBX=007e8c10 SS=017f ESP=015efce0 EBP=015efd2c
ECX=00000004 DS=017f ESI=0070c068 FS=5d17
EDX=00000013 ES=017f EDI=00000000 GS=0000
Byte all'indirizzo CS:EIP:
f3 a5 8b ca 83 e1 03 f3 a4 8b 45 dc 25 ff ff 00 
Immagine dello stack:
007dfbbc 00000000 00000013 007e8c10 00000000 015efd10 bff7b77b bff741f7 bff7b9c5 0070cf00 00000013 00000008 00000000 0070c060 0070bf08 0070c314