";
/// Functions
function s($var) {
/// returns $var with HTML characters (like "<", ">", etc.) properly quoted,
/// or if $var is empty, will return an empty string.
return empty($var) ? "" : htmlSpecialChars(stripslashes($var));
}
function p($var) {
/// prints $var with HTML characters (like "<", ">", etc.) properly quoted,
/// or if $var is empty, will print an empty string.
echo empty($var) ? "" : htmlSpecialChars(stripslashes($var));
}
function nvl(&$var, $default="") {
/// if $var is undefined, return $default, otherwise return $var
return isset($var) ? $var : $default;
}
function strip_querystring($url) {
/// takes a URL and returns it without the querystring portion
if ($commapos = strpos($url, '?')) {
return substr($url, 0, $commapos);
} else {
return $url;
}
}
function get_referer() {
/// returns the URL of the HTTP_REFERER, less the querystring portion
global $HTTP_REFERER;
return strip_querystring(nvl($HTTP_REFERER));
}
function me() {
/// returns the name of the current script, WITH the querystring portion.
/// this function is necessary because PHP_SELF and REQUEST_URI and PATH_INFO
/// return different things depending on a lot of things like your OS, Web
/// server, and the way PHP is compiled (ie. as a CGI, module, ISAPI, etc.)
global $REQUEST_URI, $PATH_INFO, $PHP_SELF;
if ($REQUEST_URI) {
return $REQUEST_URI;
} else if ($PATH_INFO) {
return $PATH_INFO;
} else if ($PHP_SELF) {
return $PHP_SELF;
} else {
notify("Error: Could not find any of these web server variables: \$REQUEST_URI, \$PATH_INFO or \$PHP_SELF");
}
}
function qualified_me() {
/// like me() but returns a full URL
global $HTTPS, $HTTP_HOST;
if (!$HTTP_HOST) {
notify("Error: could not find web server variable: \$HTTP_HOST");
}
$protocol = (isset($HTTPS) && $HTTPS == "on") ? "https://" : "http://";
$url_prefix = "$protocol$HTTP_HOST";
return $url_prefix . me();
}
function match_referer($good_referer = "") {
/// returns true if the referer is the same as the good_referer. If
/// good_referer is not specified, use qualified_me as the good_referer
global $CFG;
if ($CFG->buggy_referer) {
return true;
}
if ($good_referer == "") {
$good_referer = qualified_me();
}
return $good_referer == get_referer();
}
function stri_replace($find, $replace, $string ) {
/// This does a search and replace, ignoring case
/// This function is only here because one doesn't exist yet in PHP
/// Unlike str_replace(), this only works on single values (not arrays)
$parts = explode(strtolower($find), strtolower($string));
$pos = 0;
foreach ($parts as $key => $part) {
$parts[$key] = substr($string, $pos, strlen($part));
$pos += strlen($part) + strlen($find);
}
return (join($replace, $parts));
}
function read_template($filename, &$var) {
/// return a (big) string containing the contents of a template file with all
/// the variables interpolated. all the variables must be in the $var[] array or
/// object (whatever you decide to use).
///
/// WARNING: do not use this on big files!!
$temp = str_replace("\\", "\\\\", implode(file($filename), ""));
$temp = str_replace('"', '\"', $temp);
eval("\$template = \"$temp\";");
return $template;
}
function checked(&$var, $set_value = 1, $unset_value = 0) {
/// if variable is set, set it to the set_value otherwise set it to the
/// unset_value. used to handle checkboxes when you are expecting them from
/// a form
if (empty($var)) {
$var = $unset_value;
} else {
$var = $set_value;
}
}
function frmchecked(&$var, $true_value = "checked", $false_value = "") {
/// prints the word "checked" if a variable is true, otherwise prints nothing,
/// used for printing the word "checked" in a checkbox form input
if ($var) {
echo $true_value;
} else {
echo $false_value;
}
}
function link_to_popup_window ($url, $name="popup", $linkname="click here", $height=400, $width=500, $title="Popup window") {
/// This will create a HTML link that will work on both
/// Javascript and non-javascript browsers.
/// Relies on the Javascript function openpopup in javascript.php
/// $url must be relative to home page eg /mod/survey/stuff.php
global $CFG;
echo "\n";
echo "\n\n";
}
function close_window_button() {
/// Prints a simple button to close a window
echo "";
}
function choose_from_menu ($options, $name, $selected="", $nothing="choose", $script="", $nothingvalue="0", $return=false) {
/// Given an array of value, creates a popup menu to be part of a form
/// $options["value"]["label"]
if ($nothing == "choose") {
$nothing = get_string("choose")."...";
}
if ($script) {
$javascript = "onChange=\"$script\"";
}
$output = "