[PHP] Variable representation
I am trying to represent the variable:
$row['Bible_knowledge_phrase_solver_game_question_topics_1']
Where the # 1 is replaced by a variable --- $i
The following code executes without an error, but “Hello world” doesn’t show on
the screen.
?php
$row['Bible_knowledge_phrase_solver_game_question_topics_1'] = hello world;
$i = 1;
echo ${row['Bible_knowledge_phrase_solver_game_question_topics_$i']};
?
What needs to change? Ron
Ron Piggott
www.TheVerseOfTheDay.info
RE: [PHP] Variable representation
-Original Message-
From: Ron Piggott [mailto:ron.pigg...@actsministries.org]
Sent: Thursday, June 21, 2012 3:47 AM
To: php-general@lists.php.net
Subject: [PHP] Variable representation
I am trying to represent the variable:
$row['Bible_knowledge_phrase_solver_game_question_topics_1']
Where the # 1 is replaced by a variable --- $i
The following code executes without an error, but “Hello world” doesn’t show on
the screen.
?php
$row['Bible_knowledge_phrase_solver_game_question_topics_1'] = hello world;
$i = 1;
echo ${row['Bible_knowledge_phrase_solver_game_question_topics_$i']};
?
What needs to change? Ron
Ron Piggott
www.TheVerseOfTheDay.info
You can do this
echo $row['Bible_knowledge_phrase_solver_game_question_topics_'.$i];
I would not suggest a variable name that long.
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Re: [PHP] Variable representation
or you can do this echo $row[Bible_knowledge_phrase_solver_game_question_topics_$i];
[PHP] why is (intval('444-44444') == '444-44444') EQUAL??!
Huh? Why is this equal??!
php $id = '444-4';
php var_dump($id, intval($id));
string(9) 444-4
int(444)
php if (intval($id) == $id) echo 'equal'; else echo 'not equal';
equal
or in other words:
php if (intval('444-4') == '444-4') echo 'equal'; else
echo 'not equal';
equal
I would expect PHP to be evaluating string 444-4 against integer 444
(or string either way)
however, just for giggles, using === works...
php if ($id === intval($id)) echo 'equal'; else echo 'not equal';
not equal
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Re: [PHP] why is (intval('444-44444') == '444-44444') EQUAL??!
On 12-06-21 10:27 PM, Daevid Vincent wrote:
Huh? Why is this equal??!
php $id = '444-4';
php var_dump($id, intval($id));
string(9) 444-4
int(444)
php if (intval($id) == $id) echo 'equal'; else echo 'not equal';
equal
or in other words:
php if (intval('444-4') == '444-4') echo 'equal'; else
echo 'not equal';
equal
I would expect PHP to be evaluating string 444-4 against integer 444
(or string either way)
however, just for giggles, using === works...
php if ($id === intval($id)) echo 'equal'; else echo 'not equal';
not equal
Using === will always fail because on the left you have a string and on
the right you have an integer which fails exact comparison based on
datatype mismatch.
When comparing a string to an integer using == PHP performs type
juggling and converts the string to an integer first.
Cheers,
Rob.
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Re: [PHP] why is (intval('444-44444') == '444-44444') EQUAL??!
Using == will compare the two values after type juggling is performed. === will
compare based on value and type (identical).
PHP Will type juggle the string to an integer.
Your if/else is just like saying:
php if (444 == 444) echo 'equal'; else echo 'not equal';
equal
--
Mike Mackintosh
PHP 5.3 ZCE
On Thursday, June 21, 2012 at 10:27 PM, Daevid Vincent wrote:
Huh? Why is this equal??!
php $id = '444-4';
php var_dump($id, intval($id));
string(9) 444-4
int(444)
php if (intval($id) == $id) echo 'equal'; else echo 'not equal';
equal
or in other words:
php if (intval('444-4') == '444-4') echo 'equal'; else
echo 'not equal';
equal
I would expect PHP to be evaluating string 444-4 against integer 444
(or string either way)
however, just for giggles, using === works...
php if ($id === intval($id)) echo 'equal'; else echo 'not equal';
not equal
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