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Special chars in textarea


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$fspec = base64_decode($_GET['q']);

if (isset($_POST['content'])) { 
if (!is_dir(dirname($fspec))) mkdir(dirname($fspec),0755,true);

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Edit template</title>
<style type="text/css">
body { background-color:#fff; font-family:arial,verdana; font-size:10pt; }
<div style="background-color:#fff;">
<form action="<?php echo $_SERVER["PHP_SELF"].'?q='.base64_encode($fspec); ?>" method="post"> 
<div><textarea id="markItUp" rows="20" cols="80" name="content"><?php include $fspec; ?></textarea></div>
	<input type="submit" value="Save" />  
	<a href="javascript:window.close();">Close window</a>


This above is for editing HTML/PHP files, so I want the data read and written to be EXACTLY as is displayed in textarea--with no special character conversions. If the file contains something similar to


<a href="http://foobar.com/index.php?q=foo&bar">Tom & Jerry</a>


The & gets converted to & when written to file, which of course breaks the page's WC3 validation. Is it getting converted when passed via POST?  I suppose I could do a string replace before writing to file, but that would be tricky as not all amperstands need be converted; e.g., the "Tom & Jerry" above.


Am I missing something obvious? Thanks in advance.



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The solution is to use htmlentities to put the contents of the file in the textarea so it gets interpreted correctly by html and then passed correctly to $_POST.

	<div><textarea id="markItUp" rows="20" cols="80" name="content"><?php echo htmlentities(file_get_contents($fspec)); ?></textarea></div>


If you really need to include it though (because there's dynamic content in the file or something), I suppose you could always hack your way with output buffering:

include $fspec;
$output = ob_get_clean();
<div><textarea id="markItUp" rows="20" cols="80" name="content"><?php echo htmlentities($output); ?></textarea></div>

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