PHP withing PHP Part 2

[Sharif]

Okay,

I asked before but no one seemed to understand it so I'll be even MORE clear.

In my database table, there is text field which has, for example, this in it:

TEXT TEXT TEXT AFTER TEXT TEXT TEXT<?php echo ("Text is plain"); ?>

Then I want to output this field on a page but all it will show is this:

TEXT TEXT TEXT AFTER TEXT TEXT TEXT

It does not show the php code because it is INSIDE php code. How can I solve this? use the eval() function?

[ir4z0r]

yes indeed,
read the examples belonging to eval() @.net

[Sharif]

Okay, here is the code WITH the eval() function:

<?php
if (isset($pageid) && is_numeric($pageid))
{
$display_legal = mysql_query("SELECT html FROM legal WHERE pageid=$pageid")
or die ("MySQL Error");
if (mysql_num_rows($display_legal) > 0)
{
while ($row = mysql_fetch_array($display_legal))
{
$legal = $row["html"];
eval ("\$legal = \"$legal\";");
echo ("<!-- startprint -->$legal<!-- stopprint -->");
}
}
}
else
{
echo("<P CLASS=\"bodytext\" ALIGN=\"CENTER\">OOX Error: \"The requested page does not exist.\"<BR>
Please <A HREF=\"javascript:history.go(-1);\" CLASS=\"bodynav\">click here</A>
to go back.</P>");
}
?>

And this is the error I get:
Parse error: parse error, unexpected T_STRING in /legal.php(71) : eval()'d code on line 1

I also read all the comments in the online manual but can't seem to get it to work.

[ir4z0r]

I've never done this myself, but try that anyway:

$legal = addslashes($row['html']);
eval ("\$legal = \"$legal\";");
echo stripslashes($legal);
echo ("<!-- startprint -->$legal<!-- stopprint -->");

[Sharif]

No that just messed up the page completely, doubling the output, also here is the error I recieved:

Parse error: parse error, unexpected T_BAD_CHARACTER, expecting T_STRING or T_VARIABLE or T_NUM_STRING in /home/sharif/public_html/beta/legal.php(71) : eval()'d code on line 64

[ir4z0r]

uhh, sorry, missed the last line, I don't think that caused the error, though 🙁

$legal = $row['html'];
//  if it doesn't work, uncomment the following line for another attempt
//  $legal = addslashes($legal);
echo '<!-- startprint -->';
eval ('?>' . $legal . '<?PHP');
echo '<!-- stopprint -->';

[Sharif]

Now, I get this error:

Parse error: parse error, unexpected $ in /legal.php(74) : eval()'d code on line 38

Why is this so hard to do?

[superwormy]

<?php

$string_from_database = " my text my text <?php print (" my php code "); ?> more text more text";

eval (" ?> " . $string_from_database . " <?php ");

?>

Note that you'll get errors if ou hvae parse errors in the eval()'d code. Teh PHP documentation on eval() is HORRIBLE.

[Sharif]

Can the variable $string_from_datbase, instead of: = "Text Text <?php ("code") ?>, can it have: = $row = ["sqlfield"]?

[Sharif]

Also, after trying the code, it output the php code along with the text (YIPEE!) but it also doubled the output. It output once with the php code, and then AGAIN without...

[superwormy]

I'm assuming you mean can you not put in the ?> and <?php tags? You can skip those if the code you're putting in doesn't have start and end <?php ?> tags, yes.

The double output is most likely something else, and not the eval function. Are you sure you artn't printing it again below?

[drawmack]

echo ("<!-- startprint -->$legal<!-- stopprint -->");

this is your problem right here.

Does it not seem obvious?

Are you cross eyed from staring at it yet?

Okay I'll elaborate.

You're already inside of a <?php ?> block when you execute this code.

In your table you have another <?php ?> block.

just directly embed the php into the table without the <?php ?> tags. and then eval should work nicely for you.

[Sharif]

Okay let me try explaining all this again:

The database field has this in it:

HEADLINE
TEXT TEXT TEXT<?php
echo '<a href="printlegal.php?pageid=' . urlencode($_GET['pageid']) . '" class="bodynav">Printer Friendly Version</a>';
?>

This is the code that is supposed to output that field WITH the eval function:

<?php 
	if (isset($pageid) && is_numeric($pageid))
	{
    		$display_legal = mysql_query("SELECT html FROM legal WHERE pageid=$pageid")
          or die ("MySQL Error");
     		if (mysql_num_rows($display_legal) > 0)
     		{ 
        			while ($row = mysql_fetch_array($display_legal)) 
        			{ 
        			    $legal = $row["html"];
 eval (" ?> " . $legal . " <?php "); 
           		    echo ("<!-- startprint -->$legal<!-- stopprint -->"); 
        			}
    			} 
	}
	else
	{
    		echo("<P CLASS=\"bodytext\" ALIGN=\"CENTER\">OOX Error: \"The requested page does not exist.\"<BR>
		      Please <A HREF=\"javascript:history.go(-1);\" CLASS=\"bodynav\">click here</A>
			 to go back.</P>");
	}
?>

You see echo ("<!--startprint -->$legal<!--stopprint -->"); <!-- startprint -->/<!-- stopprint --> is used by another page to know what to convert into a printer friendly format so ignore that.

What the page outputs is this:

HEADLINE
TEXT TEXT TEXT
Printer Friendly Version
HEADLINE
TEXT TEXT TEXT

Do you understand what is happeneing now?