From 3a082fd3d6cb2e72612d51b9d8e54e93effb93eb Mon Sep 17 00:00:00 2001
From: Derek Jones
Lets you fetch a number of items from an array. The function tests whether each of the array indices is set. If an index does not exist +it is set to FALSE, or whatever you've specified as the default value via the third parameter. Example:
+ +
+$array = array(
+ 'color' => 'red',
+ 'shape' => 'round',
+ 'radius' => '10',
+ 'diameter' => '20'
+);
+
+$my_shape = elements(array('color', 'shape', 'height'), $array);
+
+
+The above will return the following array:
+ +
+array(
+ 'color' => 'red',
+ 'shape' => 'round',
+ 'height' => FALSE
+);
+
+
+You can set the third parameter to any default value you like:
+ +
+$my_shape = elements(array('color', 'shape', 'height'), $array, NULL);
+
+
+The above will return the following array:
+ +
+array(
+ 'color' => 'red',
+ 'shape' => 'round',
+ 'height' => NULL
+);
+
+
+This is useful when sending the $_POST array to one of your Models. This prevents users from +sending additional POST data to be entered into your tables:
+ +
+$this->load->model('post_model');
+
+$this->post_model->update(elements(array('id', 'title', 'content'), $_POST));
+
+
+This ensures that only the id, title and content fields are sent to be updated.
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