Need help with bread crumbs nav links array/path

[PHPBear]

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I just converted a query that displays "bread crumbs" style navigation links to PDO:

 

				function get_path($dbh,$node,$TopnavTable, $TopnavName) {
				$stmt = $dbh->prepare("SELECT name FROM $TopnavTable WHERE $TopnavName = ?");
				$stmt->bindValue(1,$node);
				$stmt->execute();
				$stmt->setFetchMode(PDO::FETCH_ASSOC);
				$row = $stmt->fetch();
				$path = array_merge(get_path($pdo,$row['Parent'], $TopnavTable, $TopnavName), $path);
				return $path ;
				}
				

 

I also figured out a way to display the results:

 

 

$Path2 = explode("/", $path);
				$Path2[1] = '<a href="/Topics">'.$Path2[1].'</a>';
				$Path2[2] = '<a href="/Topics/'.$Path2[2].'">'.$Path2[2].'</a>';
				$Path2[3] = '<span class="navHere"><b>'.$Path2[3].'</b></span>';
				
				echo join( $Path2, ' > ' );
				

 

However, it only works only if I'm working with an array consisting of three segments. For example, I'm viewing the URL MySite/Topics/Washington/Governor, which displays the following bread crumbs trail:

Topics > Washington > Governor

If I view MySite/Washington, it should display...

Topics > Washington

But I get an error message: Undefined offset: 3, plus there's a trailing arrow (>) after Washington.

So I'm trying to figure out how to make this work with any number of segments - 2, 3, 6, etc. Regardless of the number of segments, I'd like the last segment to be unlinked. (I'm going to further put it inside a span.) Does anyone have any tips? (If there's a completely different way of doing it that's better, I'd love to hear about it.)

[hansford]

$str = 'path1/path2/path3';

$path = explode('/',$str);

$size = count($path);


for($i = 0; $i < $size; $i++) {


	if($i == $size - 1) {


		$link = htmlentities('<span class="navHere"><b>' . $path[$i] . '</b></span>');

	}

	else {


		$link = htmlentities('<a href="/Topics">' . $path[$i] . '</a>');

	}


	$path[$i] = $link;

}


echo join($path, ' &gt ');

[PHPBear]

Thanks, Hansford. I think that's the ticket, though I'm doing something wrong. I modified your code a bit to match my query and came up with this:

function get_path($dbh,$node,$TopnavTable, $TopnavName) {
    $stmt = $dbh->prepare("SELECT name FROM $TopnavTable WHERE  $TopnavName = ?");
    $stmt->bindValue(1,$node);
    $stmt->execute();
    $stmt->setFetchMode(PDO::FETCH_ASSOC);  
    $row = $stmt->fetch();  
    $path = array_merge(get_path($pdo,$row['Parent'], $TopnavTable, $TopnavName), $path);
    return  $path ;  
}
$Path2 = explode("/", $path);
$size = count($Path2);
 
for($i = 0; $i < $size; $i++) {
 
if($i == $size - 1) {
 
$link = htmlentities('<span class="navHere"><b>' . $Path2[$i] . '</b></span>');
}
else {
 
$link = htmlentities('<a href="/Topics">' . $Path2[$i] . '</a>');
}
 
$Path2[$i] = $link;
}
 
echo join($Path2, ' &gt ');

It works fine except that the links display as plain text. Can you see what I did wrong?

Edited January 5, 2014 by PHPBear

[PHPBear]

I just discovered that the links are properly hidden in the code if I remove the htmlentities thing...

$link = '<span class="navHere"><b>' . $Path2[$i] . '</b></span>';

However, in the string Topics > Washington > Governor, Topics and Washington are both linked to /Topics.

Edited January 5, 2014 by PHPBear

[hansford]

Yeah, I like to store in non-html chars. This code will remove the last span tag if it's not necessary.

//keep all paths with '/' symbol - even the last one
$str = 'path1/path2/path3/path4'; 

$path = explode('/',$str);

//remove last array element with / symbol and no path
array_pop($path);

$size = count($path);

for($i = 0; $i < $size; $i++) {
	
	//if on the first and last array element - don't add > symbol and break loop
	if($size == 1) {
		
		$link = htmlentities('<a href="/Topics">' . $path[$i] . '</a>');
		$path[$i] = $link;
		break;
	}
	//if on the last array element - don't add > symbol
	if($i == $size - 1) {
		
		$link = '<span class="navHere"><b>' . $path[$i] . '</b></span>';
	}
	else {
	
	//else add > symbol
		$link = '<a href="/Topics">' . $path[$i] . '</a> > ';
	}
	
	$path[$i] = $link;
}
//no need to join with &gt symbol
echo join($path, '');