uploadcourselib.php

<?php
defined('MOODLE_INTERNAL') || die();

/**
 * Validation callback function - verified the column line of csv file.
 * Converts standard column names to lowercase.
 * @param csv_import_reader $cir
 * @param array $stdfields standard user fields
 * @param moodle_url $returnurl return url in case of any error
 * @return array list of fields
 */
function cu_validate_course_upload_columns(csv_import_reader $cir, $stdfields, moodle_url $returnurl) {
    $columns = $cir->get_columns();

    if (empty($columns)) {
        $cir->close();
        $cir->cleanup();
        print_error('cannotreadtmpfile', 'error', $returnurl);
    }
    if (count($columns) < 2) {
        $cir->close();
        $cir->cleanup();
        print_error('csvfewcolumns', 'error', $returnurl);
    }

    $textlib = textlib_get_instance(); // profile fields may contain unicode chars

    // test columns
    $processed = array();
    foreach ($columns as $key=>$unused) {
        $field = $columns[$key];
        $lcfield = $textlib->strtolower($field);
        if (in_array($field, $stdfields) or in_array($lcfield, $stdfields)) {
            // standard fields are only lowercase
            $newfield = $lcfield;

        } else {
            $cir->close();
            $cir->cleanup();
            print_error('invalidfieldname', 'error', $returnurl, $field);
        }
        if (in_array($newfield, $processed)) {
            $cir->close();
            $cir->cleanup();
            print_error('duplicatefieldname', 'error', $returnurl, $newfield);
        }
        $processed[$key] = $newfield;
    }

    return $processed;
}

?>