[PHP] comparing a string
I have a quiz where the ansers are held in a array called $correct answers.
When I compare the string
if ($_REQUEST['x']= $correct_answers[$page-1]) {
with a double == the answer is always correct with the single = it is always
wrong.
when I echo out the posted answer and the value from the answers arrray they
are correct.
echo post equals.$_POST['x']. corect answer
is.$correct_answers[$page-1];
Ross
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Re: [PHP] comparing a string
= is the assignment operator. It is not a comparison. == is the weak
equality comparator. === is the strong equality comparator.
On Tuesday 20 June 2006 06:43, Ross wrote:
I have a quiz where the ansers are held in a array called $correct answers.
When I compare the string
if ($_REQUEST['x']= $correct_answers[$page-1]) {
with a double == the answer is always correct with the single = it is
always wrong.
when I echo out the posted answer and the value from the answers arrray
they are correct.
echo post equals.$_POST['x']. corect answer
is.$correct_answers[$page-1];
Ross
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Re: [PHP] comparing a string
At 12:43 PM +0100 6/20/06, Ross wrote:
I have a quiz where the ansers are held in a array called $correct answers.
When I compare the string
if ($_REQUEST['x']= $correct_answers[$page-1]) {
with a double == the answer is always correct with the single = it is always
wrong.
when I echo out the posted answer and the value from the answers arrray they
are correct.
When you say == the answer is always correct -- does that mean even when the
answer is wrong? If so, then there's something else going on here.
But, I believe the answer is:
if ($_REQUEST['x'] == $correct_answers[$page-1]) {
This will compare the two and if they are the same will report true. You should
read the manual.
hth's
tedd
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RE: [PHP] comparing a string
When the $_REQUEST['x'] is not 0 or '', it will be always correct condition
of your if. see the magic*.
-Original Message-
From: tedd [mailto:[EMAIL PROTECTED]
Sent: Tuesday, June 20, 2006 10:02 PM
To: Ross; php-general@lists.php.net
Subject: Re: [PHP] comparing a string
At 12:43 PM +0100 6/20/06, Ross wrote:
I have a quiz where the ansers are held in a array called $correct answers.
When I compare the string
if ($_REQUEST['x']= $correct_answers[$page-1]) {
with a double == the answer is always correct with the single = it is
always
wrong.
when I echo out the posted answer and the value from the answers arrray
they
are correct.
When you say == the answer is always correct -- does that mean even when the
answer is wrong? If so, then there's something else going on here.
But, I believe the answer is:
if ($_REQUEST['x'] == $correct_answers[$page-1]) {
This will compare the two and if they are the same will report true. You
should read the manual.
hth's
tedd
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Re: [PHP] Comparing of string
Hi Jeremy,
I tried if ( strcmp( trim($SollKombination), trim($formCheck) ) )
same negativ result. For some reason both strings are not considered to be the
same.
They have the same length, are of the same type and have the same content. Why
PHP
doesn't recognize them as beeing equal I don't get it.
thanks for your help so far
janbro
Jeremy Privett schrieb:
janbro wrote:
Hello List
I've got the following little code:
$formCheck= $_GET['formCheck'];
$SollKombination = $_SESSION['zufall'];
echo $SollKombinationbr$formCheck;
print gettype($formCheck);
echo ---;
print gettype($SollKombination);
if ($SollKombination == $formCheck){
echo test;
}
To give you some background: This code is supposed to check if a user
has tried to login via my form.
Which gives me the following output:
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
string---string
Everything the way it's supposed to be
What I don't get is, why isn't the if statement true? Shouldn't it
show test as well? Where is my mistake?
I run PHP 5.1.1 on Windows. On my Win PHP 5.0 this code works proper,
but not here ?!?
thx JanBro
Hey JanBro,
Try replacing the if statement you have with this:
if ( strcmp( trim($SollKombination), trim($formCheck) ) ) {
echo test;
}
---
Jeremy Privett [ http://www.jeremyprivett.com ]
Founder - Lead Software Developer - Hosting Systems Administrator
Omega Vortex
(http://www.omegavortex.com)
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Re: [PHP] Comparing of string
janbro wrote: Hi Jeremy, I tried if ( strcmp( trim($SollKombination), trim($formCheck) ) ) same negativ result. For some reason both strings are not considered to be the same. They have the same length, are of the same type and have the same content. Why PHP doesn't recognize them as beeing equal I don't get it. thanks for your help so far janbro This is just a shot in the dark, but have you checked the HTML source of your test to make sure that some of the characters aren't been parsed as HTML entities? That would technically make the strings different, but you wouldn't be able to tell with just echoing alone. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Comparing of string
I would guess that the '' in $_GET['formCheck'] will cause problems... Trying your code without the ampersand as in: $_GET['formCheck'] = 'ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S' It works just fine. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Comparing of string
Hello List
I've got the following little code:
$formCheck= $_GET['formCheck'];
$SollKombination = $_SESSION['zufall'];
echo $SollKombinationbr$formCheck;
print gettype($formCheck);
echo ---;
print gettype($SollKombination);
if ($SollKombination == $formCheck){
echo test;
}
To give you some background: This code is supposed to check if a user has tried
to login via my form.
Which gives me the following output:
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
string---string
Everything the way it's supposed to be
What I don't get is, why isn't the if statement true? Shouldn't it show test as
well? Where is my mistake?
I run PHP 5.1.1 on Windows. On my Win PHP 5.0 this code works proper, but not
here ?!?
thx JanBro
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Re: [PHP] Comparing of string
Hi JanBro:
Quick guess: are the strings the same length? I've been bitten many
times by string comparisons that appear to be identical but which fail due
to trailing spaces, other invisible (i.e., non-printing) characters, and
the like.
Hope this helps.
Jon
- Original Message -
From: janbro [EMAIL PROTECTED]
To: php-general@lists.php.net
Sent: Tuesday, January 03, 2006 11:22 PM
Subject: [PHP] Comparing of string
Hello List
I've got the following little code:
$formCheck= $_GET['formCheck'];
$SollKombination = $_SESSION['zufall'];
echo $SollKombinationbr$formCheck;
print gettype($formCheck);
echo ---;
print gettype($SollKombination);
if ($SollKombination == $formCheck){
echo test;
}
To give you some background: This code is supposed to check if a user has
tried to login via my form.
Which gives me the following output:
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
string---string
Everything the way it's supposed to be
What I don't get is, why isn't the if statement true? Shouldn't it show
test as well? Where is my mistake?
I run PHP 5.1.1 on Windows. On my Win PHP 5.0 this code works proper, but
not here ?!?
thx JanBro
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Re: [PHP] Comparing of string
Yep, they are of the same length.
here they are:
$SollKombination
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
$formCheck
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
When creating the string on the form page only visible characters were allowed.
thanks but that's not it.
Jon Westcot schrieb:
Hi JanBro:
Quick guess: are the strings the same length? I've been bitten many
times by string comparisons that appear to be identical but which fail due
to trailing spaces, other invisible (i.e., non-printing) characters, and
the like.
Hope this helps.
Jon
- Original Message -
From: janbro [EMAIL PROTECTED]
To: php-general@lists.php.net
Sent: Tuesday, January 03, 2006 11:22 PM
Subject: [PHP] Comparing of string
Hello List
I've got the following little code:
$formCheck= $_GET['formCheck'];
$SollKombination = $_SESSION['zufall'];
echo $SollKombinationbr$formCheck;
print gettype($formCheck);
echo ---;
print gettype($SollKombination);
if ($SollKombination == $formCheck){
echo test;
}
To give you some background: This code is supposed to check if a user has
tried to login via my form.
Which gives me the following output:
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
string---string
Everything the way it's supposed to be
What I don't get is, why isn't the if statement true? Shouldn't it show
test as well? Where is my mistake?
I run PHP 5.1.1 on Windows. On my Win PHP 5.0 this code works proper, but
not here ?!?
thx JanBro
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Re: [PHP] Comparing of string
janbro wrote:
Hello List
I've got the following little code:
$formCheck= $_GET['formCheck'];
$SollKombination = $_SESSION['zufall'];
echo $SollKombinationbr$formCheck;
print gettype($formCheck);
echo ---;
print gettype($SollKombination);
if ($SollKombination == $formCheck){
echo test;
}
To give you some background: This code is supposed to check if a user has tried
to login via my form.
Which gives me the following output:
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
ZL0X~TT4PQ%0~R0OXPRUHY7E!4~W337J71V4WDDI6$GS9480XP0TNP2I$1YX75S
string---string
Everything the way it's supposed to be
What I don't get is, why isn't the if statement true? Shouldn't it show test as
well? Where is my mistake?
I run PHP 5.1.1 on Windows. On my Win PHP 5.0 this code works proper, but not
here ?!?
thx JanBro
Hey JanBro,
Try replacing the if statement you have with this:
if ( strcmp( trim($SollKombination), trim($formCheck) ) ) {
echo test;
}
---
Jeremy Privett [ http://www.jeremyprivett.com ]
Founder - Lead Software Developer - Hosting Systems Administrator
Omega Vortex
(http://www.omegavortex.com)
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