diff --git a/plugins/php_compute.inc b/plugins/php_compute.inc
new file mode 100755
index 0000000..3c1b410
--- /dev/null
+++ b/plugins/php_compute.inc
@@ -0,0 +1,76 @@
+<?php
+$plugin = array(
+  'form'     => 'feeds_tamper_php_compute_form',
+  'callback' => 'feeds_tamper_php_compute_callback',
+  'name'     => 'PHP Compute',
+  'multi'    => 'skip',
+);
+
+function feeds_tamper_php_compute_form($importer, $element_key, $settings) {
+  $form = array();
+  $importers = feeds_importer_load_all();
+  $options = array_keys($importers);
+  $options = array_combine($options, $options);
+  $form['importer'] = array(
+    '#type' => 'select',
+    '#title' => t('Importer'),
+    '#options' => $options,
+    '#default_value' => isset($settings['importer']) ? $settings['importer'] : array(),
+  );
+
+  ctools_include('dependent');
+  foreach($importers as $importer_id => $importer) {
+    $i = str_replace('_', '-', $importer_id);
+    $form[$importer_id] = array(
+      '#type' => 'fieldset',
+      '#title' => t('Fields for '. $importer_id),
+      '#process' => array('ctools_dependent_process'),
+      '#dependency' => array('edit-php-compute-importer' => array($importer_id)),
+      '#input' => TRUE,
+      '#prefix' => '<div id="edit-php-compute-'. $i .'-wrapper"><div id="edit-php-compute-'. $i .'">',
+      '#suffix' => '</div></div>',
+    );
+
+    $mappings = $importer->processor->config['mappings'];
+    $options = array();
+    $replace = array();
+    foreach ($mappings as $map) {
+      $options[$map['source']] = $map['source'] . ' (' . $map['target'] . ')';
+      $replace[] = '[' . $map['source'] . '] = ' . $map['target'];
+    }
+
+    $form[$importer_id]['help'] = array(
+      '#type' => 'fieldset',
+      '#title' => t("Your code should return the value for the desired field.  Replacement fields are below:"),
+      '#collapsible' => TRUE,
+    );
+    foreach ($replace as $replacement) {
+      $form[$importer_id]['help'][$replacement] = array(
+        '#value' => t("$replacement"),
+        '#prefix' => '<div>',
+        '#suffix' => '</div>',
+      );
+    }
+
+    $form[$importer_id]['php_compute_code'] = array(
+        '#type' => 'textarea',
+        '#title' => t('PHP Code To Calculate Field'),
+        '#default_value' => isset($settings[$importer_id]['php_compute_code']) ? $settings[$importer_id]['php_compute_code'] : '',
+    );    
+  }
+  return $form;
+}
+
+function feeds_tamper_php_compute_callback($source, $item_key, $element_key, &$field, $values) {
+  $res = $values[$values['importer']]['php_compute_code'];
+  $sources = $source->batch->items[$item_key];
+  foreach ($sources as $key => $value) {
+    $res = str_replace("[$key]", $value, $res);
+  }
+  $field = _php_compute_value($res);
+}
+
+function _php_compute_value($code) {
+  $result = drupal_eval('<?php ' . $code . ' ?>');
+  return $result;
+}
\ No newline at end of file