From 41cc0908918f48d948fe1e1fc9c74fdec58b7a60 Mon Sep 17 00:00:00 2001
From: Eric Roberts <eric@cryode.com>
Date: Tue, 24 Jan 2012 00:59:44 -0600
Subject: Better support for using field names and rule parameters in error
 messages.

---
 system/libraries/Form_validation.php | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

(limited to 'system/libraries/Form_validation.php')

diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 0a6a2af0d..ebd96e402 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -503,7 +503,7 @@ class CI_Form_validation {
 				}
 
 				// Build the error message
-				$message = sprintf($line, $this->_translate_fieldname($row['label']));
+				$message = $this->_build_error_msg($line, $this->_translate_fieldname($row['label']));
 
 				// Save the error message
 				$this->_field_data[$row['field']]['error'] = $message;
@@ -651,7 +651,7 @@ class CI_Form_validation {
 				}
 
 				// Build the error message
-				$message = sprintf($line, $this->_translate_fieldname($row['label']), $param);
+				$message = $this->_build_error_msg($line, $this->_translate_fieldname($row['label']), $param);
 
 				// Save the error message
 				$this->_field_data[$row['field']]['error'] = $message;
@@ -693,6 +693,27 @@ class CI_Form_validation {
 		return $fieldname;
 	}
 
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Build an error message using the field and param.
+	 *
+	 * @param	string	The error message line
+	 * @param	string	A field's human name
+	 * @param	mixed	A rule's optional parameter
+	 * @return	string
+	 */
+	protected function _build_error_msg($line, $field = '', $param = '')
+	{
+		// Check for %s in the string for legacy support.
+		if (strpos($line, '%s') !== false)
+		{
+			return sprintf($line, $field, $param);
+		}
+		
+		return str_replace(array('{field}', '{param}'), array($field, $param), $line);
+	}
+
 	// --------------------------------------------------------------------
 
 	/**
-- 
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