Bug #16955 Updated: 0 == NULL, but only sometimes! :)
ID: 16955
Updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
Status: Open
Bug Type: Scripting Engine problem
Operating System: Red Hat 6.2
PHP Version: 4.2.0
New Comment:
I find the problem:
$temp = 0; // is not // $temp = 0;
Sorry :)
However, I'd like to have 0 NULL in the future :) Don't you think?
Previous Comments:
[2002-05-01 17:20:37] [EMAIL PROTECTED]
Hello!
i might have found a problem dealing with 0 and NULL values while using
a recursive function in a class that i have created.
I have found some bugs related to this problem in the php-bugs database
about 0 and NULL, but the problem i have found goes more into
depth: i've noticed that 0 == NULL only if the value 0 only if the
value 0 comes from the array passed to the recurvise function. i try
to explain with an example:
$temp = $a[$p];
if ($temp == ) {
if ($temp == 0) {
echo (impossible);
}
}
it happens that the output will be impossible.
instead, if i set $temp = 0 or NULL before the IF structures, i won't
get the output impossible:
$temp = $a[$p];
$temp = 0;
// or $temp = NULL;
// or without declaring at all the variable $temp
if ($temp == ) {
if ($temp == 0) {
echo (Impossible);
}
}
$a is an array which can be modified or not by the recursive function,
and is then passed as a parameter to the function itself
I have tested it both with version 4.0.5 and 4.2.0
If you would like to receive more details about this, i will be glad to
send you the complete source code. i have tried to reduce the lenght of
the code, anyway it's still too long to write here. if you are
interested, i could send you all the code by email or i could give you
an account to access my server and work by ftp/http
best regards,
and thank you for developing PHP :)
Claudo Frizziero
---
configure line:
configure --with-mysql --with-apxs=/usr/local/apache/bin/apxs
--with-jpeg-dir=/usr/local/bin --with-gd=/usr/ --enable-ftp
--
Edit this bug report at http://bugs.php.net/?id=16955edit=1
Bug #16955 Updated: 0 == NULL, but only sometimes! :)
ID: 16955
Updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
-Status: Open
+Status: Bogus
Bug Type: Scripting Engine problem
Operating System: Red Hat 6.2
PHP Version: 4.2.0
New Comment:
Already exists, try if (NULL !== 0) { ... } else { ... }
bogussing.
Derick
Previous Comments:
[2002-05-01 19:14:40] [EMAIL PROTECTED]
I find the problem:
$temp = 0; // is not // $temp = 0;
Sorry :)
However, I'd like to have 0 NULL in the future :) Don't you think?
[2002-05-01 17:20:37] [EMAIL PROTECTED]
Hello!
i might have found a problem dealing with 0 and NULL values while using
a recursive function in a class that i have created.
I have found some bugs related to this problem in the php-bugs database
about 0 and NULL, but the problem i have found goes more into
depth: i've noticed that 0 == NULL only if the value 0 only if the
value 0 comes from the array passed to the recurvise function. i try
to explain with an example:
$temp = $a[$p];
if ($temp == ) {
if ($temp == 0) {
echo (impossible);
}
}
it happens that the output will be impossible.
instead, if i set $temp = 0 or NULL before the IF structures, i won't
get the output impossible:
$temp = $a[$p];
$temp = 0;
// or $temp = NULL;
// or without declaring at all the variable $temp
if ($temp == ) {
if ($temp == 0) {
echo (Impossible);
}
}
$a is an array which can be modified or not by the recursive function,
and is then passed as a parameter to the function itself
I have tested it both with version 4.0.5 and 4.2.0
If you would like to receive more details about this, i will be glad to
send you the complete source code. i have tried to reduce the lenght of
the code, anyway it's still too long to write here. if you are
interested, i could send you all the code by email or i could give you
an account to access my server and work by ftp/http
best regards,
and thank you for developing PHP :)
Claudo Frizziero
---
configure line:
configure --with-mysql --with-apxs=/usr/local/apache/bin/apxs
--with-jpeg-dir=/usr/local/bin --with-gd=/usr/ --enable-ftp
--
Edit this bug report at http://bugs.php.net/?id=16955edit=1
