possible? parsing php code when i read a file?

sijis

is there a way to open a file, get the contents, but when you print out what the file has, it parses any PHP code that it has?

here's an example of what i mean:

http://12.249.79.143/print.php?url=/test/test1.php

once you go there, view the source. you should see php code that doesn't execute. Is there a way to make it execute?

What i'm doing it reading a file a showing only the contents of the file taht are between  and

$file = $url;
$str_value = "";
$read = fopen($file, "rb");
while(!feof($read)){
    $str_value .= fread($read, filesize($file));
}
fclose($read);

echo $str_value;

the_Igel

If you need to execute the code stored in a file, you either include it, or you read the file and then eval the content of it.
If you only want to print parts that are between this and that, you just read the file line by line, until you find This, then continue reading and printing until the string is That, and then stop printing but continue reading looking for next instance of This.

sijis

i'm trying what you are telling me, but i'm stuck.

$str_value = "";
$read = fopen($file, "rb");
while(!feof($read)){
    $str_value .= fread($read, filesize($file));
}
fclose($read);

// Get length of print text
$str_start = strpos($str_value, "<!-- start -->"); 
$str_finish = strpos($str_value, "<!-- end -->"); 
$str_length = $str_finish-$str_start;
$str_value = substr($str_value, $str_start, $str_length);
// problem is below i'm sure.
$arrfile = explode("\n",$str_value);
echo $arrfile;
foreach($arrfile as $line => $value){
	//echo "Key: $line | Value: $value<br>";
	if(strstr($value,"< ?")){
		//echo "Begin";
		$php_begin = strpos($value, "< ?php"); 
		$php_end = strpos($value, "? >");
		$php_exec = substr($value, $php_begin, $php_end-$php_begin);
		echo $php_exec;
		//echo "Done";
		eval($php_exec);
	}else{
		echo $value;
	}
}

// in the end i'd do this:
// echo $str_value;

My data looks like this (between  and 

Before PHP code
<?php
$var = "PHP code!";
echo $var;
echo "";
?>
After PHP code

I do notice in my foreach loop that the <?php string is in one line and the end tag is in another line. that means that my conditional if() statement and the variables set would be wrong, since i'd have to go a few more lines in order to get the position of ?>
i'm close, but i can't get around that! 🙁

the_Igel

No, it's still unclear a bit to me, what do you want to do. You want to read the file, and print it out, and if it's in php tag, then execute it instead of printing, right?

$file = file('data.txt');
$mode = 0; // 0 for printing , 1 for executing.

foreach($file as $line)
{
if ($line == '< ?php')
   $mode = 1;

elseif ($line == '? >')
   $mode = 0;

elseif ($mode)
   eval($line);

else echo $line;
}

(remove spaces in php tags in this code: I inserted them, because w/o them highlightening failed)

sijis

Yep, that's what i wanted to do. I just couldn't explain it. Gosh, i wrote all that nonsense and you did it in about 10 lines... i'm a dork.
I'm trying to make a Friendly-Print-Page type of script.
Thanks so much.

i used strstr function instead.
here's the final result

$str_value = "";
$read = fopen($file, "rb");
while(!feof($read)){
    $str_value .= fread($read, filesize($file));
}
fclose($read);

// Get length of print text
$str_start = strpos($str_value, "<!-- start -->"); 
$str_finish = strpos($str_value, "<!-- end -->"); 
$str_length = $str_finish-$str_start;
$str_value = substr($str_value, $str_start, $str_length);

$mode = 0; // 0 for printing , 1 for executing.
$arrfile = explode("\n",$str_value);
foreach($arrfile as $line){
	if (strstr($line,"< ?php")){
	   $mode = 1;
	}
	elseif (strstr($line,"? >")){
	   $mode = 0;
	}
	elseif ($mode){
	   eval($line);
	}
	else {
		echo $line;
	}
}

the_Igel

The only problem you can encounter is that a line of code may be split in two:

$somevalue = trim('a long line').
               strtolower(' ANOTHER lOnG lInE');

So you'd better not eval the lines immediately, but rather store them in a varibable, and then eval() them all at once.

sijis

ok, i see what you mean.

that means after i loop through all the lines of the file.
i'd have 2 variables.

$php_code
and
$no_php_code

so when i finally print out the page, it won't be desired and in the same page order.

Maybe i could get the lines between the php tags and execute it in the conditional elseif ($mode) statement. I'll have to tinker with that thought later. hold up, but isn't what this code is doing now?

sijis

ok, i think i found a solution!
it should work with split lines of php code and other 'styles' of code:
here are the php examples i used:

<!-- startprint -->
PHP Code Below 1
<?php
$var = "/PHP code 1/";
echo $var;
?>
PHP Code Below 2 
<?php echo "PHP Code 2"; ?>
PHP Code Below 3
<?php
echo "/PHP Code 3/";
$var = "var line 1".
		"var line 2";
?>
<!-- stopprint -->

here's my final code:

foreach($arrfile as $line){
	if(strstr($line,"<?") && strstr($line,"?>")){
		eval('?>'.$line);
	}
	else{
		if (strstr($line,"<?")){
		   $mode = 1;
		}
		elseif (strstr($line,"?>")){
		   $mode = 0;
		}
		elseif ($mode){
			if(strstr($line,";")){
			   eval($line);
			}
		}
		else {
			echo $line;
		}
	}
}

i've just noticed it doesn't work with while loops, why not?