1 files changed, 74 insertions, 0 deletions
diff --git a/engine/lib/elgglib.php b/engine/lib/elgglib.php
index fd270bc1d..ac46df078 100644
--- a/engine/lib/elgglib.php
+++ b/engine/lib/elgglib.php
@@ -2710,6 +2710,80 @@ function elgg_get_breadcrumbs() {
 
 
 /**
+ * Sticky forms
+ */
+
+/**
+ * Load all the REQUEST variables into the sticky form cache
+ *
+ * Call this from an action when you want all your submitted variables
+ * available if the submission fails validation and is sent back to the form
+ */
+function elgg_make_sticky_form() {
+	elgg_clear_sticky_form();
+
+	$_SESSION['sticky_form'] = array();
+
+	foreach($_REQUEST as $key => $var) {
+		// will go through XSS filtering on the get function
+		$_SESSION['sticky_form'][$key] = $var;
+	}
+}
+
+
+/**
+ * Clear the sticky form cache
+ *
+ * Call this if validation is successful in the action handler or
+ * when they sticky values have been used to repopulate the form
+ * after a validation error.
+ */
+function elgg_clear_sticky_form() {
+	unset($_SESSION['sticky_form']);
+}
+
+/**
+ * Has this form been made sticky
+ *
+ * @return boolean
+ */
+function elgg_is_sticky_form() {
+	return isset($_SESSION['sticky_form']);
+}
+
+/**
+ * Get a specific stick variable
+ *
+ * @param string $variable The name of the variable
+ * @param mixed $default Default value if the variable does not exist in sticky cache
+ * @param boolean $filter_result Filter for bad input if true
+ * @return mixed
+ *
+ * @todo should this filter the default value?
+ */
+function elgg_get_sticky_value($variable, $default = "", $filter_result = true) {
+	if (isset($_SESSION['sticky_form'][$variable])) {
+		$value = $_SESSION['sticky_form'][$variable];
+		if ($filter_result) {
+			// XSS filter result
+			$value = filter_tags($value);
+		}
+		return $value;
+	}
+	return $default;
+}
+
+/**
+ * Clear a specific sticky variable
+ *
+ * @param string $variable The name of the variable to clear
+ */
+function elgg_clear_sticky_value($variable) {
+	unset($_SESSION['sticky_form'][$variable]);
+}
+
+
+/**
  * Returns the PHP INI setting in bytes
  *
  * @param str $setting