php-general Digest 21 Nov 2008 14:29:43 -0000 Issue 5802
Topics (messages 283624 through 283631):
Re: in_array breaks down for 0 as value
283624 by: Lars Torben Wilson
283628 by: Stut
reading XML
283625 by: Angelo Zanetti
283626 by: Jim Lucas
283627 by: Jim Lucas
283629 by: Nathan Rixham
Re: user access/roles/privs functionality
283630 by: Martijn Korse
Anyway to simulate pcntl_fork() on Windows?
283631 by: Brian Dunning
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----------------------------------------------------------------------
--- Begin Message ---
2008/11/20 Stut <[EMAIL PROTECTED]>:
> On 20 Nov 2008, at 06:55, Yashesh Bhatia wrote:
>>
>> I wanted to use in_array to verify the results of a form submission
>> for a checkbox and found an interesting
>> behaviour.
>>
>> $ php -v
>> PHP 5.2.5 (cli) (built: Jan 12 2008 14:54:37)
>> $
>>
>> $ cat in_array2.php
>> <?php
>> $node_review_types = array(
>> 'page' => 'page',
>> 'story' => 'story',
>> 'nodereview' => 'abc',
>> );
>>
>> if (in_array('page', $node_review_types)) {
>> print "page found in node_review_types\n";
>> }
>> if (in_array('nodereview', $node_review_types)) {
>> print "nodereview found in node_review_types\n";
>> }
>>
>> ?>
>> $ php in_array2.php
>> page found in node_review_types
>> $
>>
>> This works fine. but if i change the value of the key 'nodereview' to
>> 0 it breaks down.
>>
>> $ diff in_array2.php in_array3.php
>> 6c6
>> < 'nodereview' => 'abc',
>> ---
>>>
>>> 'nodereview' => 0,
>>
>> $
>>
>> $ php in_array3.php
>> page found in node_review_types
>> nodereview found in node_review_types
>> $
>>
>> Any reason why in_array is returning TRUE when one has a 0 value on the
>> array ?
>
> That's weird, 5.2.6 does the same thing. There's actually a comment about
> this on the in_array manual page from james dot ellis at gmail dot com...
>
> <quote>
>
> Be aware of oddities when dealing with 0 (zero) values in an array...
>
> This script:
> <?php
> $array = array('testing',0,'name');
> var_dump($array);
> //this will return true
> var_dump(in_array('foo', $array));
> //this will return false
> var_dump(in_array('foo', $array, TRUE));
> ?>
>
> It seems in non strict mode, the 0 value in the array is evaluating to
> boolean FALSE and in_array returns TRUE. Use strict mode to work around this
> peculiarity.
> This only seems to occur when there is an integer 0 in the array. A string
> '0' will return FALSE for the first test above (at least in 5.2.6).
>
> </quote>
>
> So use strict mode and this problem will go away. Oh, and please read the
> manual before asking a question in future.
>
> -Stut
I wouldn't consider it weird; it's just how PHP handles loose type
comparisons. I would certainly agree that it's not terribly obvious
why it happens, though. :) That said, it's consistent with PHP
behaviour.
James Ellis almost got it right in his note. As I already noted, it's
not because of a conversion to boolean FALSE, but a conversion to
integer 0. You can test this by substituting FALSE for the 0 in the
array in the example and trying it.
Torben
--- End Message ---
--- Begin Message ---
On 20 Nov 2008, at 23:09, Ashley Sheridan wrote:
On Thu, 2008-11-20 at 09:25 +0000, Stut wrote:
On 20 Nov 2008, at 06:55, Yashesh Bhatia wrote:
I wanted to use in_array to verify the results of a form submission
for a checkbox and found an interesting
behaviour.
$ php -v
PHP 5.2.5 (cli) (built: Jan 12 2008 14:54:37)
$
$ cat in_array2.php
<?php
$node_review_types = array(
'page' => 'page',
'story' => 'story',
'nodereview' => 'abc',
);
if (in_array('page', $node_review_types)) {
print "page found in node_review_types\n";
}
if (in_array('nodereview', $node_review_types)) {
print "nodereview found in node_review_types\n";
}
?>
$ php in_array2.php
page found in node_review_types
$
This works fine. but if i change the value of the key
'nodereview' to
0 it breaks down.
$ diff in_array2.php in_array3.php
6c6
< 'nodereview' => 'abc',
---
'nodereview' => 0,
$
$ php in_array3.php
page found in node_review_types
nodereview found in node_review_types
$
Any reason why in_array is returning TRUE when one has a 0 value on
the array ?
That's weird, 5.2.6 does the same thing. There's actually a comment
about this on the in_array manual page from james dot ellis at gmail
dot com...
<quote>
Be aware of oddities when dealing with 0 (zero) values in an array...
This script:
<?php
$array = array('testing',0,'name');
var_dump($array);
//this will return true
var_dump(in_array('foo', $array));
//this will return false
var_dump(in_array('foo', $array, TRUE));
?>
It seems in non strict mode, the 0 value in the array is evaluating
to
boolean FALSE and in_array returns TRUE. Use strict mode to work
around this peculiarity.
This only seems to occur when there is an integer 0 in the array. A
string '0' will return FALSE for the first test above (at least in
5.2.6).
</quote>
So use strict mode and this problem will go away. Oh, and please read
the manual before asking a question in future.
-Stut
--
http://stut.net/
What about using the === and !== comparisons to compare and make sure
that 0 is not giving a false false.
That's effectively what using strict mode does. RTFM please.
-Stut
--
http://stut.net/
--- End Message ---
--- Begin Message ---
Hi all,
I have a script that I call with CURL and get an XML response with a few
parameters.
I need to be able to read that XML but not sure how to.
I know of simpleXML but the server is php4.
Would xml_parse be the thing to look at?
What is the simplest way to accomplish this small challenge?
Thanks in advance.
--- End Message ---
--- Begin Message ---
Angelo Zanetti wrote:
Hi all,
I have a script that I call with CURL and get an XML response with a few
parameters.
I need to be able to read that XML but not sure how to.
I know of simpleXML but the server is php4.
Would xml_parse be the thing to look at?
What is the simplest way to accomplish this small challenge?
Thanks in advance.
Maybe look into this example. Just a quick search and found this. Not
sure if it will even work in your situation, but thought I would pass it
along.
http://us2.php.net/manual/en/function.xml-parser-create.php#38739
Jim Lucas
--- End Message ---
--- Begin Message ---
Angelo Zanetti wrote:
Hi all,
I have a script that I call with CURL and get an XML response with a few
parameters.
I need to be able to read that XML but not sure how to.
I know of simpleXML but the server is php4.
Would xml_parse be the thing to look at?
What is the simplest way to accomplish this small challenge?
Thanks in advance.
Or this one even
http://us2.php.net/manual/en/function.xml-parse.php#83416
Jim Lucas
--- End Message ---
--- Begin Message ---
Angelo Zanetti wrote:
What is the simplest way to accomplish this small challenge?
you could give this a go if you like (one i made earlier):
http://programphp.com/xmlparser.phps - class at the top, usage at the
bottom.
it simply turns xml into an associated array, using regex; just tested
it again as it's a couple of years old and it's working on php 4.4.7 and
php 5.2.5
--- End Message ---
--- Begin Message ---
bruce-60 wrote:
>
> Hi list...
>
> I need a way of managing users/teams/etc.. implementing roles/access
> rights/privs,etc...
Have a look at Zend_Acl:
http://framework.zend.com/manual/en/zend.acl.html
-----
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--- End Message ---
--- Begin Message ---
It's the function I need most and it's not available on Windows, and
unfortunately that's what the client uses. Any suggestions for a
workaround?
--- End Message ---
