display user input without \n\r - php

Question

I use functions (check(removeTags($data))) to save the text in mysql database:
function check($data){
if (get_magic_quotes_gpc()) {
$data = stripslashes($data);
}
$data =addcslashes( mysql_real_escape_string($data) , "%_" );
return $data;
}
function removeTags($data){
$data=trim($data);
$data=strip_tags($data);
return $data;
}
I use this function to display text above was saved to the user.
function output($data){
return htmlspecialchars($data,ENT_QUOTES,"UTF-8");
}
But Unwanted character are added to the text.replace newline('<br/>') with "\r\n".
I use stripslashes but it didn't worked ( replace '\r\n' with 'nr' ).
I use str_replace("\r\n", "<br />",$data) but it didn't worked too.
how can i remove '\r\n' ?
edit
see this outputting \r\n after text is decoded - PHP .
but user input is not encoded with that function ( like encode ),user input language is persian (Arabic).

Answer 1

For remove all new line characters from string use:
function check($data) {
if (get_magic_quotes_gpc()) {
$data = stripslashes($data);
}
// this will remove all \n\r from output what you asked in question
$data = str_replace(array("\r", "\n"), '', $data);
// in case you want new line in place of \n\r use line below
// $data = nl2br($data);
$data = addcslashes(mysql_real_escape_string($data) , "%_");
return $data;
}
...
Make sure you use this on clean user input. Before addslashes or other escaping methods. After escaping EOL characters became "\\r\\n" and str_replace will not work on them.