".get_string("filemissing", "", "$langdir/$file")."

".get_string("stringsnotset","","$langdir/$file")."

";
                        $first = false;
                        $somethingfound = true;
                    }
                    echo "$"."string['$key'] = \"$value\";
";
                }
            }
        }
    
        if (! $files = get_directory_list("$CFG->dirroot/lang/en/help", "CVS")) {
            error("Could not find English language help files!");
        }
    
        foreach ($files as $filekey => $file) {    // check all the help files.
            if (!file_exists("$langdir/help/$file")) {
                echo "
".get_string("filemissing", "", "$langdir/help/$file")."
";
                $somethingfound = true;
                continue;
            }
        }
    
        if (! $files = get_directory_list("$CFG->dirroot/lang/en/docs", "CVS")) {
            error("Could not find English language docs files!");
        }
        foreach ($files as $filekey => $file) {    // check all the docs files.
            if (!file_exists("$langdir/docs/$file")) {
                echo "
".get_string("filemissing", "", "$langdir/docs/$file")."
";
                $somethingfound = true;
                continue;
            }
        }
    
        if (!empty($somethingfound)) {
            print_continue("lang.php");
        } else {
            notice(get_string("languagegood"), "lang.php");
        }

    } else if ($mode == "compare") {

        if (isset($_POST['currentfile'])){   // Save a file
            $newstrings = $_POST;
            unset($newstrings['currentfile']);
            if (lang_save_file($langdir, $currentfile, $newstrings)) {
                notify(get_string("changessaved")." ($langdir/$currentfile)", "green");
            } else {
                error("Could not save the file '$currentfile'!", "lang.php?mode=compare¤tfile=$currentfile");
            }
        }

        print_heading_with_help($strcomparelanguage, "langedit");

        print_simple_box_start("center", "80%");
        echo '';
        foreach ($stringfiles as $file) {
            if ($file == $currentfile) {
                echo "$file   ";
            } else {
                echo "$file   ";
            }
        }
        echo '';
        print_simple_box_end();

        
        print_heading("$currentfile", "center", 4);

        if (!file_exists("$langdir/$currentfile")) {
            if (!touch("$langdir/$currentfile")) {
                echo "
".get_string("filemissing", "", "$langdir/$currentfile")."
";
                continue;
            }
        }

        error_reporting(0);
        if ($f = fopen("$langdir/$currentfile","r+")) {
            $editable = true;
            fclose($f);
        } else {
            $editable = false;
            echo "
".get_string("makeeditable", "", "$langdir/$currentfile")."
";
        }
        error_reporting(7);


        unset($string);
        include("$enlangdir/$currentfile");
        $enstring = $string;  
        ksort($enstring);

        unset($string);
        include("$langdir/$currentfile");

        if ($editable) {
            echo "
";
        }
        echo "";
        foreach ($enstring as $key => $envalue) {
            $envalue = nl2br(htmlspecialchars($envalue));
            $envalue = preg_replace('/(\$a\-\>[a-zA-Z0-9]*|\$a)/', '$0', $envalue);  // Make variables bold. 
            $envalue = str_replace("%%","%",$envalue);
            $envalue = str_replace("\\","",$envalue);              // Delete all slashes

            echo "";
            echo "";
            echo "";

            $value = $string[$key];
            $value = str_replace("\r","",$value);              // Bad character caused by Windows
            $value = str_replace("\n\n\n\n\n\n","\n",$value);  // Collapse runs of blank lines
            $value = str_replace("\n\n\n\n\n","\n",$value);
            $value = str_replace("\n\n\n\n","\n",$value);
            $value = str_replace("\n\n\n","\n",$value);
            $value = str_replace("\n\n\n","\n",$value);
            $value = str_replace("\\","",$value);              // Delete all slashes
            $value = str_replace("%%","%",$value);
            $value = htmlspecialchars($value);

            $cellcolour = $value ? $THEME->cellcontent: $THEME->highlight;

            if ($editable) {
                echo "";
                }
                echo "";

            } else {
                echo "";
            }
        }
        if ($editable) {
            echo "";
        }
        echo "
cellheading\" nowrap valign=top>$key
cellheading\" valign=top>$envalue
";
                if (isset($string[$key])) {
                    $valuelen = strlen($value);
                } else {
                    $valuelen = strlen($envalue);
                }
                $cols=50;
                if (strstr($value, "\r") or strstr($value, "\n") or $valuelen > $cols) {
                    $rows = ceil($valuelen / $cols);
                    echo "$value";
                } else {
                    if ($valuelen) {
                        $cols = $valuelen + 2;
                    }
                    echo "
$value
 

";
            echo "    ";
            echo "    ";
            echo "    ";
            echo "
";
        echo "
";

    }

    print_footer();

//////////////////////////////////////////////////////////////////////

function lang_save_file($path, $file, $strings) {
// Thanks to Petri Asikainen for the original version of code 
// used to save language files.
//
// $path is a full pathname to the file
// $file is the file to overwrite.
// $strings is an array of strings to write

    global $CFG, $USER;

    error_reporting(0);
    if (!$f = fopen("$path/$file","w")) {
        return false;
    }
    error_reporting(7);


    fwrite($f, "release ($CFG->version)\n\n\n");

    ksort($strings);

    foreach ($strings as $key => $value) {
        list($id, $stringname) = explode("-",$key);
        if ($CFG->lang != "zh_hk" and $CFG->lang != "zh_tw") {  // Some MB languages include backslash bytes
            $value = str_replace("\\","",$value);           // Delete all slashes
        }
        $value = str_replace("'", "\\'", $value);           // Add slashes for '
        $value = str_replace('"', "\\\"", $value);          // Add slashes for "
        $value = str_replace("%","%%",$value);              // Escape % characters
        $value = str_replace("\r", "",$value);              // Remove linefeed characters
        if ($id == "string" and $value != ""){
            fwrite($f,"\$string['$stringname'] = '$value';\n");
        }
    }
    fwrite($f,"\n?>\n");
    fclose($f);

    return true;
}

?>