parser?

[lwq]

I am in the process of creating a parser, the following is the code i have started with:

<?php
/*  &copy; MMVI weiqiang's minisite productions
	This programme is intented to be used only on weiqiang's minisite,and no unauthorised usage is allowed.
	You may use the programme if only granted permission by the author.
	Programme filename: manager.php
	Programme function: 
	Programme authorised to: Original Copy(weiqiang's minisite)
*/
/*Start Of Programme*/
function parsedocument($document,$returnview=null){
	//document is with regards to root folder
	if(stristr($document,'.php')){
		$handle = fopen($document, "r");
		$contents = fread($handle, filesize($document));
		fclose($handle);
		sprintf($contents);
		preg_replace("{title}","$title",$content);
	}
	/*elseif(!stristr($document,'.php')){
		die(error_note(1010));
		return false;
	}*/
}
parsedocument('bbcode.php');
?>

But i am having a problem of "printing" out the final code
as print() does not support anything other than variable,html and characters right?I mean it doesn't suppot those "<?php" and "?>".

What should i do?

[Oersoep]

What is it you're trying to do?

Reading a template for a script and then running it?

In that case you need the evil eval() function...
But be VERY careful with that... keep in mind who's able to feed your script code... and what you might destroy by accident.

[lwq]

I am trying to replace the code on a page(fully html) and contain site internal tags with "{taggie}", for example and the convert it to php

i have another way,but longer method which is
1.proofread the file then replace tags accordingly.
2.after parsing, save in a separate file in a separate folder( like cache and with a line of comment saying the expire timestamp)
3.then use the function eval to parse it

but i have a few questions: is it feasible?is it safe?eval cannot parse code with "<?php" tags right?

[Oersoep]

I still don't really get where you want to go.

Maybe you can just feed the php files into the php exectutable instead of eval. Or simply include them.

But anyway, maybe this is possible?

eval( '?>srbaergberb<b>teb</b><?php echo "say cheese";' );

[lwq]

i am stating two options that i can make my parser to be,
the first one would be code go in >parse> excuted directly
second one is code go in> parse > save as cache>included in function to be excuted

[Oersoep]

So it's web-based scripting right?

Well, you seem to have tackled the {taggie} part.

You'll probably find this handy:

user@hostname: ~ # php -l /path/to/file.php
No syntax errors detected in /path/to/file.php

If you put that in a shell_exec() and read the output, you can show any parse errors to the user, without really running it.
Be careful with the filenames though.

[lwq]

i am not quite sure what you mean by put that in shell_exec(), mind explaining to me?

(PS: I won't reply for today, as its near sleep time [GMT +8](tml got sch)and so i will reply tml)

[Oersoep]

If you run this on the command prompt it'll tell you if your syntax is valid without really running the code.

// php -l [filename]

$file = 'newfile.php';

$cmd = "php -l $file";

//So:

$output = shell_exec( $cmd );

if( strstr( $output, 'No syntax errors detected' ) ){
   // okay, save, run or whatever
}else{
   echo "Your code contained the following parse errors: <br>\n".$output;
   echo "Please fix them or I won't run it.";
}

[lwq]

But if i want to run the code just like running the file directly?