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-rw-r--r--system/language/english/form_validation_lang.php1
-rw-r--r--system/libraries/Form_validation.php13
2 files changed, 14 insertions, 0 deletions
diff --git a/system/language/english/form_validation_lang.php b/system/language/english/form_validation_lang.php
index cf1b3b503..6ff0cc2f4 100644
--- a/system/language/english/form_validation_lang.php
+++ b/system/language/english/form_validation_lang.php
@@ -42,6 +42,7 @@ $lang['is_numeric'] = 'The %s field must contain only numeric characters.';
$lang['integer'] = 'The %s field must contain an integer.';
$lang['regex_match'] = 'The %s field is not in the correct format.';
$lang['matches'] = 'The %s field does not match the %s field.';
+$lang['differs'] = 'The %s field must differ from the %s field.';
$lang['is_unique'] = 'The %s field must contain a unique value.';
$lang['is_natural'] = 'The %s field must only contain digits.';
$lang['is_natural_no_zero'] = 'The %s field must only contain digits and must be greater than zero.';
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index fccc12afa..6db5bb495 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -971,6 +971,19 @@ class CI_Form_validation {
// --------------------------------------------------------------------
/**
+ * Differs from another field
+ *
+ * @param string
+ * @param string field
+ * @return bool
+ */
+ public function differs($str, $field)
+ {
+ return ! (isset($this->_field_data[$field]) && $this->_field_data[$field]['postdata'] === $str);
+ }
+
+ // --------------------------------------------------------------------
+ /**
* Is Unique
*
* Check if the input value doesn't already exist