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Amazing Discovery - Usefull PHP Bug
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Email
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| Submitted on: |
12/27/2005 1:01:43 AM |
| By: |
OscarMedina
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| Level: |
Beginner |
| User Rating: |
By 3 Users |
| Compatibility: |
PHP 3.0, PHP 4.0, PHP 5.0 |
| Views: |
7311 |
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(About the author) |
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I was working on a php site with a big problem couse i wanted to check for example $demo[$n] and it never worked untill i made a try with no ilution with this small code $next = "demo".$n and when i wrote it as $$next it worked!!!! as if it was $demo1 - $demo2 - $demo3 :D i hope you find it usefull too and plz VOTE FOR ME !!!!!
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//**************************************
// Name: Amazing Discovery - Usefull PHP Bug
// Description:I was working on a php site with a big problem couse i wanted to check for example $demo[$n] and it never worked untill i made a try with no ilution with this small code $next = "demo".$n and when i wrote it as $$next it worked!!!! as if it was $demo1 - $demo2 - $demo3 :D i hope you find it usefull too and plz VOTE FOR ME !!!!!
// By: OscarMedina
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=1882&lngWId=8//for details.//**************************************
<HTML>
< FORM METHOD=post>
< input type=checkbox name=demo1 >Try 1<br>
< input type=checkbox name=demo2 >Try 2<br>
< input type=checkbox name=demo3 >Try 3<br>
< INPUT TYPE=submit NAME=OK VALUE="Check"><BR>
</FORM>
</HTML>
<?php
#If the button was pressed then
if ($OK == "Check") {
#For $n from 1 to 3
for ($n=1;$n<= "3";$n++)
{
$resulta=$counter[$n];
#Next Variable
$next = "demo".$n;
#Here is the Bug
if ( $$next == "on" ){
#It gets $$next as $demo1 - $demo2 - $demo3 Amazing!!!
#Write in document Try # is on in Bold then make an html newline
echo "<B>Try ".$n." is on</B><BR>";
}
}
}
?>
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Other 1 submission(s) by this author
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Other User Comments
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 12/27/2005 7:18:34 PM: Ryand833
Well, it's not really a bug, as much as an added feature. It was intended to work this way:
http://us3.php.net/language.variables.variable
(If this comment was disrespectful, please report it.)
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5/25/2006 2:27:30 PM: Paulo
Stup*d! This is not a bug. and is not a amazing discovery ... is a powerful function of the php, this is called Variabels Variable!
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4/23/2012 8:49:12 AM: Steven W. Hoyt
it's not a bug...AND it has nothing to do with variable variables...other than you have to use them BECAUSE OF HOW YOU wrote your html! if you want to do $demo[$n], then understand you must name your inputs and NOT . again, it's your problem and not a php bug.
(If this comment was disrespectful, please report it.)
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