Adding newline to PHP string [duplicate] - php

Question

This question already has answers here:
What is the difference between single-quoted and double-quoted strings in PHP?
(7 answers)
Closed 7 years ago.
I'm trying to add new line at the end of string, so I could better see <option> in new lines, hovewer I get string with "\r\n" as text instead of new lines. What is wrong with code ?
foreach ($xml['ROW'] as $ar) {
$tekstas = $ar['zz'] . ' (' . $ar['xx'] . ')';
$insert .= '<option value="' . $ar['Adresas'] . '">' . $tekstas .'</option> "\r\n"' ;
}
echo nl2br(htmlentities($insert));

Answer 1

Almost there, look at the right way to concatenate the new line to the rest of the string you generate.
foreach ($xml['ROW'] as $ar) {
$tekstas = $ar['zz'] . ' (' . $ar['xx'] . ')';
$insert .= '<option value="' . $ar['Adresas'] . '">' . $tekstas .'</option> ' . PHP_EOL ;
}
echo nl2br(htmlentities($insert));

Answer 2

'-quoted strings do not honor escaped metacharacters like "-quoted ones do:
echo '\r' - outputs a literal backslash and an 'r'
echo "\r" - outputs a carriage return
the only escapes that are supported in ' strings are \' and \\.
So..
'</option> "\r\n"'
^---open single quote string
^---close single-quote string
when it should be
'</option> ' . "\r\n"
instead.

Answer 3

"\r\n" should be in double quotes.
foreach ($xml['ROW'] as $ar) {
$tekstas = $ar['zz'] . ' (' . $ar['xx'] . ')';
$insert .= '<option value="' . $ar['Adresas'] . '">' . $tekstas .'</option>'."\r\n";
}
echo nl2br(htmlentities($insert));