windows OS
...\system\Debug\Toolbar\View\toolbar.tpl.php
$value) : ?>
<?php if (empty($value)) continue; ?>
<tr>
<td><?= esc($value->getName()) ?></td>
<td><?= esc($value->getValueLine()) ?></td>
</tr>
<?php endforeach; ?>
var_dump($headers);
from this it follows that $value === string or $value === array
array(14) {
["Host"]=>
array(2) {
[0]=>
string(7) "ci4.loc"
[1]=>
object(CodeIgniter\HTTP\Header)#9 (2) {
["name":protected]=>
string(4) "Host"
["value":protected]=>
string(7) "ci4.loc"
}
}
["X-Real-IP"]=>
string(9) "127.0.0.1"
["X-Forwarded-For"]=>
array(2) {
[0]=>
string(9) "127.0.0.1"
[1]=>
object(CodeIgniter\HTTP\Header)#11 (2) {
["name":protected]=>
string(15) "X-Forwarded-For"
["value":protected]=>
string(9) "127.0.0.1"
}
}
["Connection"]=>
array(2) {
[0]=>
string(5) "close"
[1]=>
object(CodeIgniter\HTTP\Header)#12 (2) {
["name":protected]=>
string(10) "Connection"
["value":protected]=>
string(5) "close"
}
}
["User-Agent"]=>
array(2) {
[0]=>
string(78) "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0"
[1]=>
object(CodeIgniter\HTTP\Header)#13 (2) {
["name":protected]=>
string(10) "User-Agent"
["value":protected]=>
string(78) "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0"
}
}
["Accept"]=>
array(2) {
[0]=>
string(63) "text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8"
[1]=>
object(CodeIgniter\HTTP\Header)#14 (2) {
["name":protected]=>
string(6) "Accept"
["value":protected]=>
string(63) "text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8"
}
}
["Accept-Language"]=>
array(2) {
[0]=>
string(35) "ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3"
[1]=>
object(CodeIgniter\HTTP\Header)#15 (2) {
["name":protected]=>
string(15) "Accept-Language"
["value":protected]=>
string(35) "ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3"
}
}
["Accept-Encoding"]=>
array(2) {
[0]=>
string(13) "gzip, deflate"
[1]=>
object(CodeIgniter\HTTP\Header)#16 (2) {
["name":protected]=>
string(15) "Accept-Encoding"
["value":protected]=>
string(13) "gzip, deflate"
}
}
["DNT"]=>
string(1) "1"
["Pragma"]=>
array(2) {
[0]=>
string(8) "no-cache"
[1]=>
object(CodeIgniter\HTTP\Header)#18 (2) {
["name":protected]=>
string(6) "Pragma"
["value":protected]=>
string(8) "no-cache"
}
}
["Cache-Control"]=>
array(2) {
[0]=>
string(8) "no-cache"
[1]=>
object(CodeIgniter\HTTP\Header)#19 (2) {
["name":protected]=>
string(13) "Cache-Control"
["value":protected]=>
string(8) "no-cache"
}
}
["Content-Type"]=>
bool(false)
["X-Real-Ip"]=>
object(CodeIgniter\HTTP\Header)#10 (2) {
["name":protected]=>
string(9) "X-Real-Ip"
["value":protected]=>
string(9) "127.0.0.1"
}
["Dnt"]=>
object(CodeIgniter\HTTP\Header)#17 (2) {
["name":protected]=>
string(3) "Dnt"
["value":protected]=>
string(1) "1"
}
}
windows OS
...\system\Debug\Toolbar\View\toolbar.tpl.php
var_dump($headers);
from this it follows that $value === string or $value === array