PHP: Catching location to append id at nav menu - php

Question

I'm using this PHP function to append id="current" to my nav menu according to the page you're in.
function get_current() {
foreach(func_get_args() as $arg) {
if (strpos($_SERVER['REQUEST_URI'], $arg) !== false) {
echo 'id="current"';
}
}
}
Simple HTML:
<ul>
<li <?php get_current('') ?>><a>HOME</a></li>
<li <?php get_current('page1.php') ?>><a>PAGE 1</a></li>
<li <?php get_current('page2.php') ?>><a>PAGE 2</a></li>
<li <?php get_current('page3.php') ?>><a>PAGE 3</a></li>
<li <?php get_current('page4.php') ?>><a>PAGE 4</a></li>
</ul>
It works fine, except for the Home page. What argument should I use? The home page is at the root of the domain. I'd like to avoid forcing users to go to index.php and instead, set that as the argument.

Answer 1

In your case, I would solve it like this:
<?
function get_current( $nav_page ) {
$uri = $_SERVER['REQUEST_URI'];
return ( $uri == $nav_page ) ? ' id="current" ' : '';
}
?>
And small changes in HTML:
<ul>
<li <?= get_current('/') ?> ><a>HOME</a></li>
<li <?= get_current('/page1.php') ?> ><a>PAGE 1</a></li>
<li <?= get_current('/page2.php') ?> ><a>PAGE 2</a></li>
<li <?= get_current('/page3.php') ?> ><a>PAGE 3</a></li>
<li <?= get_current('/page4.php') ?> ><a>PAGE 4</a></li>
</ul>
Please note that I changed the parameters to absolute URLs because $_SERVER['REQUEST_URI'] contains absolute path.
EDIT:
Since you used func_get_args(), you might be going to accept arbitrary number of 'page-name.php' as parameter for get_current(). In that case, the get_current function becomes:
function get_current() {
$uri = $_SERVER['REQUEST_URI'];
if ( in_array( $uri, func_get_args() ) )
return ' id="current" ';
return '';
}
and its accompanying HTML:
<li <?= get_current('/', '/index.php')?> > ... </li>
EDIT2:
Your $_SERVER['REQUEST_URI'] shows that files are in the /new/ folder. Changed the logic to compare end-parts.
<?
function get_current( $nav_page ) {
$uri = $_SERVER['REQUEST_URI'];
return is_rear_match( $uri, $nav_page ) ? ' id="current" ' : '';
}
function is_rear_math( $haystack, $needle ) {
$rear = substr($haystack, -strlen($needle));
return $rear !== false && $rear === $needle;
}
?>
HTML:
<ul>
<li <?= get_current('/') ?> ><a>HOME</a></li>
<li <?= get_current('/page1.php') ?> ><a>PAGE 1</a></li>
<li <?= get_current('/page2.php') ?> ><a>PAGE 2</a></li>
<li <?= get_current('/page3.php') ?> ><a>PAGE 3</a></li>
<li <?= get_current('/page4.php') ?> ><a>PAGE 4</a></li>
</ul>