I suggest to store the image's HTML code in a variable like
$separator = '<img src="themes/panzajoteros/images/navbit-arrow-right.png"/>';
and then use
strlen($separator)
to let PHP count the number of characters for you.
Note that allvip's code still contains some custom modifications, so it's maybe not exactly what you're looking for. That's why I suggest to add this code to your theme's theme.php file:
/******************************************************************************
** Section <<<theme_breadcrumb>>> - START
******************************************************************************/
// Function for building the breadcrumb
// Inputs: $breadcrumb_links, $BREADCRUMB_TEXTS
// Outputs: $breadcrumb, $BREADCRUMB_TEXT
function theme_breadcrumb($breadcrumb_links, $BREADCRUMB_TEXTS, &$breadcrumb, &$BREADCRUMB_TEXT)
{
$breadcrumb = '';
$BREADCRUMB_TEXT = '';
$separator = '<img src="themes/panzajoteros/images/navbit-arrow-right.png" />';
foreach ($breadcrumb_links as $breadcrumb_link) {
$breadcrumb .= $separator . $breadcrumb_link;
}
foreach ($BREADCRUMB_TEXTS as $BREADCRUMB_TEXT_elt) {
$BREADCRUMB_TEXT .= $separator . $BREADCRUMB_TEXT_elt;
}
// We remove the first $separator
$breadcrumb = substr_replace($breadcrumb,'', 0, strlen($separator));
$BREADCRUMB_TEXT = substr_replace($BREADCRUMB_TEXT,'', 0, strlen($separator));
}
/******************************************************************************
** Section <<<theme_breadcrumb>>> - END
******************************************************************************/