[PHP] Re: HELP!! how can arithmetic variables(string) ??

[Colin Guthrie]

LKSunny wrote:
 ?
 $a=1+1; //variables(string)
 
 //how can arithmetic variables(string) ??
 //N ROW
 
 //output
 echo $a //i need output 2 not 1+1
 //Please Help, Thank You Very Much !!
 ? 
 

You can do:

eval(echo $a;);

But be warned, this has Injection Attack written all over it!

Col

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[PHP] Re: HELP!! how can arithmetic variables(string) ??

[LKSunny]

Thank You !

Colin Guthrie [EMAIL PROTECTED] ¼¶¼g©ó¶l¥ó·s»D:[EMAIL PROTECTED]
 LKSunny wrote:
 ?
 $a=1+1; //variables(string)

 //how can arithmetic variables(string) ??
 //N ROW

 //output
 echo $a //i need output 2 not 1+1
 //Please Help, Thank You Very Much !!
 ?


 You can do:

 eval(echo $a;);

 But be warned, this has Injection Attack written all over it!

 Col 

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To unsubscribe, visit: http://www.php.net/unsub.php

Re: [PHP] Re: HELP!! how can arithmetic variables(string) ??

[Jochem Maas]

Colin Guthrie wrote:
 LKSunny wrote:
 ?
 $a=1+1; //variables(string)

 //how can arithmetic variables(string) ??
 //N ROW

 //output
 echo $a //i need output 2 not 1+1
 //Please Help, Thank You Very Much !!
 ? 

 
 You can do:
 
 eval(echo $a;);

you realise Sunny stopped reading at this point.
some people should not be given guns. ;-)

 
 But be warned, this has Injection Attack written all over it!
 
 Col
 

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Re: [PHP] Re: HELP!! how can arithmetic variables(string) ??

[Nathan Nobbe]

On 10/18/07, Jochem Maas [EMAIL PROTECTED] wrote:

 Colin Guthrie wrote:
  LKSunny wrote:
  ?
  $a=1+1; //variables(string)
 
  //how can arithmetic variables(string) ??
  //N ROW
 
  //output
  echo $a //i need output 2 not 1+1
  //Please Help, Thank You Very Much !!
  ?
 
 
  You can do:
 
  eval(echo $a;);

 you realise Sunny stopped reading at this point.
 some people should not be given guns. ;-)


a much safer technique is to restrict the options on the input and define a
custom function that
has expectations based upon those restrictions:

function addStringPieces($stringWAddition) {
$addComponents = explode('+', $stringWAddition);
return $addComponents[0] + $addComponents[1];
}
php  echo addStringPieces('1+1');
2

-nathan