wat?

gistfile1.php

<?php

class X_TigerEDI_Model_Observer_850 extends X_TigerEDI_Model_Observer
{

    protected $_ediID = 850;

    private $_ediFiles = array();

    /**
     * @TODO Add response EDIs for generator
     */
    public function generateFull()
    {

    }

    public function parse()
    {
        foreach ($this->_getFilesList() as $ediFile) {
            $ediContents = file_get_contents($ediFile);
            $ediContents = array_slice(preg_split("/\^/", $ediContents), 0, -1);
            var_dump($ediFile);
        }
    }

    protected function _getFilesList()
    {
        if ($this->_ediFiles === array()) {
            $ediFiles = glob(self::TIGEREDI_INCOMING . '*.EDI');
            $this->_ediFiles = $ediFiles;
        }

        return $this->_ediFiles;
    }
}

output

string(54) "/home/x/edi/incoming/file1.EDI"
string(54) "/home/x/edi/incoming/file2.EDI"
NULL