PHP eval()

[SiKing]

Hey, Does anyone know how to use the eval function. I wanna output a variable which is stored in a mySQL database but I keep getting this stupid error.

Parse error: syntax error, unexpected T_STRING in /home/.eurypides/npsale/vezor.net/certificate.php(39) : eval()'d code on line 1

I'm guessing there's an error in the entry in the database but i removed the text apart from the variable and still nothing.

$certext = stripslashes($row['certext']);
eval("$certext");

Thats part of my PHP for getting the code and eval()ing it.

Thanks

 

[Peter]

try echoing out $certext and ensure that it is valid php code. Never used this function myself but looking at the php.net website it states that it has to be 100% valid php code.

 

[SiKing]

Yeah, it works but the variable just reads $variable.. if that makes sense

 

[mikesherov]

the eval function is not what you should use to output variables. Use print() instead. The eval() function evaluates whatever string you put inside of it as PHP code:

print('hello'); //prints to the browser: hello
eval('hello'); //is equivalent to typing "hello" as that LINE OF CODE

print('$cert=2;') // prints to the browser: $cert=2;
eval('$cert=2;') // is the equivalent of typing "$cert=2;" as that LINE OF CODE

eval('$cert=2;');
print($cert);

//will print the value "2" because it is the same as saying:

$cert=2;
print($cert);

 

[SiKing]

I get what you're saying Mike, but it still displays "$url" in the text.

$url is the variable in the database.
$certext is the text which the variable is in.

Thanks for the help though Mike

I think it may be the way I've set it up, I set the variable $url first.

1. $url is set
2. Row ($certext) from MySQL database is taken with "$url" within the text.
3. Need to print $certext.

 

[SiKing]

I think it may have something to do with my host even. Every page on my website has:

$page = "Homepage";
include("head.php");

Then in my head.php file I have:

echo "<title>$pagetitle</title>";

Yet in the browser, it displays "$pagetitle" rather than "Homepage". I know it has worked with previous hosts though. :td:

 

[Scott2503]

You should do this:

eval("$certext = stripslashes($row['certext']);");

Try that and post how it works...

 

[SiKing]

Get the following error:

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in /home/.eurypides/npsale/vezor.net/certificate.php on line 38


But thanks anyway

 

[tm]

It could be something simple. try this;

$certext = stripslashes($row['certext']);
eval($certext);

 

[Scott2503]

Sorry I meant:

eval("$certext = stripslashes(".$row['certext'].");");

 

[SiKing]

Nah, still no worky. Not to worry. I'll try a different approach. Thanks anyway Scott

 

[Jim_]

echo "<title>$pagetitle</title>";

Do this instead:

echo "<title>".$pagetitle."</title>";

 

[SiKing]

Thanks Jim!

 

[Eric]

Sorry I meant:

eval("$certext = stripslashes(".$row['certext'].");");

eval("\$certext = stripslashes(\$row['certext']);");

 

[Icespadez]

I think it may have something to do with my host even. Every page on my website has:

$page = "Homepage";
include("head.php");

Then in my head.php file I have:

echo "<title>$pagetitle</title>";

Yet in the browser, it displays "$pagetitle" rather than "Homepage". I know it has worked with previous hosts though. :td:

Is your variable called $page or $pagetitle? If this is the code you have in your files, there is no variable named $pagetitle.

 

[2knew]

Jim already answered this. post deleted

 

[SiKing]

I've been trying to sort this all afternoon. It is still displaying $variable. I've got rid of all the Errors but it is still not working!!

It works when there is just $variable; in the database but I need text with $variable in.