strange output

I download Flexinode 4.6.0, put it into /modules/flexinode in my Drupal 4.6.3 site, and executed flexinode.mysql which it successfully created the tables. When I went to my Drupal site, instead of my Drupal site I saw what I pasted below. Note that I didn't even enabled the module through Drupal's admin screen, since I just had no admin screen and no Drupal anymore because what I was seeing was this:

field_id; if ($node->$fieldname) { $table=$node->$fieldname; $rows=count($table)+1; $cols=count($table[0])+1; } else { $table=array(); $rows=8; $cols=5; } $output = ''; $output .= form_hidden($fieldname.'_rows',$rows); $output .= '
'.t($field->label).':
'; $output .= ''; $title = t($field->label); for ($i = 0; $i < $rows; $i++) { $output .= ''; for ($j = 0; $j < $cols; $j++) { $output .= ''; } $output .= ''; } $output .= '
'; $value = (isset($table[$i]) && isset($table[$i][$j])) ? $table[$i][$j] : ''; $output .= form_textarea('', $fieldname.'_'.$i.'][', $value, 10, 3); $output .= '
  '; return $output; } function flexinode_field_table_validate($field, $node) { $fieldname = 'flexinode_'. $field->field_id; if (!isset($_POST['edit'])) { return array('value' => $node->$fieldname); } $rows = $_POST['edit'][$fieldname.'_rows']; $value = array(); $deleted_cols = array(); foreach ($_POST['edit'][$fieldname.'_0'] as $key=>$val) { if (empty($val) && $key) { $deleted_cols[] = $key; } } for ($i = 0; $i <= $rows; $i++) { if ($i && empty($_POST['edit'][$fieldname.'_'.$i][0])) { continue; } $newrow = $_POST['edit'][$fieldname.'_'.$i]; foreach ($deleted_cols as $key) unset($newrow[$key]); $value[] = array_values($newrow); // reindex from 0 } return (array('value' => $value)); } function flexinode_field_table_insert($field, $node) { $fieldname = 'flexinode_'. $field->field_id; db_query("INSERT INTO {flexinode_data} (nid, field_id, serialized_data) VALUES (%d, %d, '%s')", $node->nid, $field->field_id, serialize($node->$fieldname)); } function flexinode_field_table_db_select($field) { $fieldname = 'flexinode_'. $field->field_id; return $fieldname .'.serialized_data AS '. $fieldname; } function flexinode_field_table_load($field, $node) { $fieldname = 'flexinode_'. $field->field_id; if (isset($table_phase)) $table_phase++; else $table_phase=0; return unserialize($node->$fieldname); } function flexinode_field_table_format($field, $node, $brief = 0) { $fieldname = 'flexinode_'. $field->field_id; $table = $node->$fieldname; $output = ""; $i=0; foreach ($table as $row) { $output .= ''; $i=1-$i; } $output .= "
'.implode('  ',$row).'
  "; return $output; } function theme_flexinode_table($field_id, $label, $value, $formatted_value) { $output = theme('form_element', $label, $formatted_value); $output = '
'. $output .'
'; return $output; } ?> 
  '.$output.'
   '; return theme('form_element', $title, $output, $description, 'edit-'. $name, $required, _form_get_error($name)); } function _add_colorpickerjs(){ $js = '   '; drupal_set_html_head($js); return $js; } ?>

and it even generated an image (colour picker!).

Now my Drupal works fine because I dropped the database tables and removed the flexinode directory.

My environment is: Drupal 4.6.3, MySQL 4.1.9, PHP 5.0.3, Apache 1.3, GNU/Linux.

In short, Flexinode couldn't even work and even affected my Drupal, until I removed it.