Custom form validation rule

I'm not great with RegEx, so I would usually go with something like this:

PHP Code:

$fields = explode(':', $field);
list($table, $field) = explode('.', $fields[0], 2);
$ignore = isset($fields[1]) ? $fields[1] : null; 


This code will work whether a colon is passed in the $field or not, but there is potential for issues if the string doesn't contain a table.field combination (either before the colon or without one), so you may need some additional code if that is a possibility. Generally, unless I need something fairly complex, explode() is easier to understand and gets predictable results.

Also, instead of:

PHP Code:

return $this->CI->db->num_rows() === 0; 


You may want to use something like this:

PHP Code:

$row = $this->CI->db->get()->row();
return ! isset($row); 


After all, you don't really care how many rows were returned, and, if num_rows() works at all the way you're using it, it's very likely to be getting the full result set and counting it, rather than using a method provided by the database to determine how many rows were returned by a query.

Bonfire

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