HOW TO : execute PHP code contained in a string ?

Hi,

Is there a function to execute PHP code contained in a string ?
Example :

$toto='<? echo "ca marche"; ?>';

thanks for your help !

Regards,

Fred

zemask wrote:
> Hi,
>
> Is there a function to execute PHP code contained in a string ?
> Example :
>
> $toto='<? echo "ca marche"; ?>';
>
> thanks for your help !
>
> Regards,
>
> Fred

<http://www.php.net/eval>

zemask wrote:

> Is there a function to execute PHP code contained in a string ?
> Example :

> $toto='<? echo "ca marche"; ?>';

Why the hell would you want to do that ???

Have a look at eval()... i NEVER had to use it, though.

regards, f.

Cujo wrote:
> zemask wrote:
>
> > Is there a function to execute PHP code contained in a string ?
> > Example :
>
> > $toto='<? echo "ca marche"; ?>';
>
> Why the hell would you want to do that ???
>
> Have a look at eval()... i NEVER had to use it, though.
>
> regards, f.

"If eval() is the answer, you're asking the wrong question."

True most of the time, but not necessarily /all/ of the time.

"ZeldorBlat" <zeldorblat@gmail.com> wrote in message
news:1138940613.589720.161670@g44g2000cwa.googlegr oups.com...
>
> Cujo wrote:
>> zemask wrote:
>>
>> > Is there a function to execute PHP code contained in a string ?
>> > Example :
>>
>> > $toto='<? echo "ca marche"; ?>';
>>
>> Why the hell would you want to do that ???
>>
>> Have a look at eval()... i NEVER had to use it, though.
>>
>> regards, f.
>
> "If eval() is the answer, you're asking the wrong question."
>
> True most of the time, but not necessarily /all/ of the time.
>

I think eval() is just the answer I was looking for to a problem I had with
my project. I have an array with key -> string, which picks a random array
entry and echoes the string. Sometimes though, I want the string to contain
instructions to do something else. So, I can put my instructions in [] and
eval anything within.

Just saying that because, I'm surprised people are saying "eval is evil"
when I just happened to read this thread, at exactly the time I was thinking
about how to complete this project, and thought, "bingo!!"

On Fri, 03 Feb 2006 19:23:40 +0200, Marnok.com
<wizardharry@pottermarnok.com> wrote:

>
> "ZeldorBlat" <zeldorblat@gmail.com> wrote in message
> news:1138940613.589720.161670@g44g2000cwa.googlegr oups.com...
>>
>> Cujo wrote:
>>> zemask wrote:
>>>
>>> > Is there a function to execute PHP code contained in a string ?
>>> > Example :
>>>
>>> > $toto='<? echo "ca marche"; ?>';
>>>
>>> Why the hell would you want to do that ???
>>>
>>> Have a look at eval()... i NEVER had to use it, though.
>>>
>>> regards, f.
>>
>> "If eval() is the answer, you're asking the wrong question."
>>
>> True most of the time, but not necessarily /all/ of the time.
>>
>
> I think eval() is just the answer I was looking for to a problem I had
> with
> my project. I have an array with key -> string, which picks a random
> array
> entry and echoes the string. Sometimes though, I want the string to
> contain
> instructions to do something else. So, I can put my instructions in []
> and
> eval anything within.
>
> Just saying that because, I'm surprised people are saying "eval is evil"
> when I just happened to read this thread, at exactly the time I was
> thinking
> about how to complete this project, and thought, "bingo!!"

eval() is only evil when you're wreckless with it. The key is to be very
sure that you know where the stuff comes from that you're eval'ing. I
think something like this would be safe:
$code = "echo 'Hello World';";
$result = eval(" ?>".$code."<?php ");
echo $result;

However, if $code is unknown or has a possibility of being unknown, you
can run into trouble very fast. In plain English, never eval user input.

..:A

"Albe" <albe@ambientatom.co.za> wrote in message
news:op.s4jk252mth8uo6@equus.up.ac.za...
> On Fri, 03 Feb 2006 19:23:40 +0200, Marnok.com
> <wizardharry@pottermarnok.com> wrote:
>
>>
>> "ZeldorBlat" <zeldorblat@gmail.com> wrote in message
>> news:1138940613.589720.161670@g44g2000cwa.googlegr oups.com...
>>>
>>> Cujo wrote:
>>>> zemask wrote:
>>>>
>>>> > Is there a function to execute PHP code contained in a string ?
>>>> > Example :
>>>>
>>>> > $toto='<? echo "ca marche"; ?>';
>>>>
>>>> Why the hell would you want to do that ???
>>>>
>>>> Have a look at eval()... i NEVER had to use it, though.
>>>>
>>>> regards, f.
>>>
>>> "If eval() is the answer, you're asking the wrong question."
>>>
>>> True most of the time, but not necessarily /all/ of the time.
>>>
>>
>> I think eval() is just the answer I was looking for to a problem I had
>> with
>> my project. I have an array with key -> string, which picks a random
>> array
>> entry and echoes the string. Sometimes though, I want the string to
>> contain
>> instructions to do something else. So, I can put my instructions in []
>> and
>> eval anything within.
>>
>> Just saying that because, I'm surprised people are saying "eval is evil"
>> when I just happened to read this thread, at exactly the time I was
>> thinking
>> about how to complete this project, and thought, "bingo!!"
>
> eval() is only evil when you're wreckless with it. The key is to be very
> sure that you know where the stuff comes from that you're eval'ing. I
> think something like this would be safe:
> $code = "echo 'Hello World';";
> $result = eval(" ?>".$code."<?php ");
> echo $result;
>
> However, if $code is unknown or has a possibility of being unknown, you
> can run into trouble very fast. In plain English, never eval user input.
>
> .:A



amen to that, Albe. I can see the potential for mischief. I'll only eval()
from my own data files.

"zemask" <frederes@free.fr> wrote in message
news:43e22058$0$169$a3f2974a@nnrp1.numericable.fr. ..
> Hi,
>
> Is there a function to execute PHP code contained in a string ?
> Example :
>
> $toto='<? echo "ca marche"; ?>';

if that's withina PHP code section, you might just be sending the PHP
interpreter into a tizzy-fit. that ?> might be interpreted as the end of
the code segment and you end up with '; in your browser. try it and see
what happens. but I don't guarantee any good results between versions of
PHP.

>
> thanks for your help !
>
> Regards,
>
> Fred
>
>
>