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issue with \n\r and nl2br

Posted on 2011-02-24
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Last Modified: 2012-05-11
I'm passing a variable in my URL
index.php?p=this\r\ntext

using $_GET[var] I'm getting this\\r\\ntext

why is \r\n being modified to \\r\\n

nl2br() won't work in my variable

replace_sub("\\r\\n","<br/>", $var) doesn't work either ?

can you help?
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Question by:joomla
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8 Comments
 
LVL 34

Expert Comment

by:gr8gonzo
ID: 34975333
Try:
$var = str_replace("\\\\r\\\\n","<br/>",$var);
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Author Comment

by:joomla
ID: 34976328

this is how far I seem to get
index.php?p=separate\r\nlines

$var=$_GET[var];

what $var gets is "\\r\\n"   (don't understand why the change.   as I inputed "\r\n")

$unwanted=array("\r","\n","\r\n","\\r\\n","\\r\\n");
$wanted="<br/>";
$var= str_replace($unwanted,$wanted,$var);

results in $var = separate<br/>lines

when I put this in the text area it shows
separate<br/>lines

I wanted it to show
separate
lines

thanks for any help


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LVL 34

Expert Comment

by:gr8gonzo
ID: 34976718
If you want it on separate lines in a text area, you don't need to use <br/> - text areas pay attention to line breaks. Just change $wanted = "\r\n"; and you should see what you're looking for.

The problem is that by default, PHP tries to automatically escape special characters that are entered via the query string. It's a security thing, which you can turn off, but  that's not recommmended. It's better to simply fix any specific cases like this.
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Author Comment

by:joomla
ID: 34976734
Hi gr8gonzo:
thanks for feedback
unfortunately your suggested didn't work
regards
M
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LVL 34

Expert Comment

by:gr8gonzo
ID: 34976741
What does your code look like right now?
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LVL 27

Accepted Solution

by:
Lukasz Chmielewski earned 125 total points
ID: 34977428
Step by step. Does this work:


<?php
$var=$_GET[p];

//what $var gets is "\\r\\n"   (don't understand why the change.   as I inputed "\r\n")

$unwanted="\\\\n";
$wanted="\n";
$var= str_replace($unwanted,$wanted,$var); 

$unwanted="\\\\r";
$wanted="\r";
$var= str_replace($unwanted,$wanted,$var); 

?>
<textarea><?php echo"$var";?></textarea>

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LVL 5

Expert Comment

by:onemadeye
ID: 34992480
This is simple codes and should be working ...
NOTICE the way I use single quotes and double quotes in str_replace
$var = $_GET['p'];
$var = stripslashes($var);
// Turning \r\n to breakspace in textarea
echo '<textarea>'.str_replace('\r\n', "\r\n", $var).'</textarea>';

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Regards...
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LVL 5

Expert Comment

by:onemadeye
ID: 34992504
And here's for the learning purposes (for those who wonder) :-)
<?php

// \r\n on single quotes
$var1 = 'NO break \r\n space';
// \r\n on double quotes
$var2 = "YES break \r\n space";

// echo $var1 in TEXTAREA
echo 'Var#1: <textarea>'.$var1.'</textarea>';
// echo $var2 in TEXTAREA
echo 'Var#2: <textarea>'.$var2.'</textarea>';

?>

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