Added modelform and model extensions

extensions/element_exists.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+*
+* @author  Antonio de la Rosa <webmaster@web-t-sys.com>
+* @file
+* @package Core/ModelExtraMethods
+*
+*
+*/
+
+/**
+* Extra Method for Webmodel. Is used for check if element with $idrow id exists in the database.
+*
+* @param Webmodel $class Webmodel instance class.
+* @param mixed $idrow The id of the element to search.
+* @param string $field_search The field where search the specified "id" if you want use other field distinct to default id field.
+*
+*/
+
+function element_exists_method_class($class, $idrow, $field_search='')
+{
+
+	if($field_search=='')
+	{
+	
+		$field_search=$class->idmodel;
+	
+	}
+
+	settype($idrow, 'integer');
+	
+	$num_elements=$class->select_count('where '.$field_search.'=\''.$idrow.'\'', $class->idmodel);
+	
+	return $num_elements;
+
+}
+
+?>