A number of ZF components, including Zend_Loader and Zend_Tool_Framework_Loader_IncludePathLoader, are not tolerant of the new PHP 5.3 phar:// paths.

Zend_Tool_Framework_Loader_IncludePathLoader::_getFiles() example:

$paths = explode(PATH_SEPARATOR, get_include_path());

An include path of 'phar://foo/bar.phar:.:/usr/lib/php' will result in $paths looking like this:

Array
(
    [0] => phar
    [1] => //foo/bar.phar
    [2] => .
    [3] => /usr/lib/php
)

For ZF to support environments where phars are used in the include path, we may no longer explode on PATH_SEPARATOR. Instead, we now need to step through the include_path string more carefully, like this:

// step through inc path, beware of phar://
$incpath = get_include_path();
$paths = array();
$offset = 0;
while ($pos = strpos($incpath, ':', $offset)) {
    $chunk = substr($incpath, 0, $pos);
    if ($chunk == 'phar') {
        ++$offset;
        continue;
    }
    $offset = 0;
    $paths[] = $chunk;
    $incpath = substr($incpath, $pos+1);
}

// catch the last one which no longer has 
// a PATH_SEPARATOR in it
if (! empty($incpath)) {
    $paths[] = $incpath;
}
unset($incpath, $offset, $chunk);

That results in $paths looking like this:

Array
(
    [0] => phar://foo/bar.phar
    [1] => .
    [2] => /usr/lib/php
)