category function creates error: Object of class WP_Error could not be converted to string

[christian_gnoth]

Hello,

I am using the following PHP script lines:

 $category_id = get_cat_ID( $row['title'] );
 // Get the URL of this category
 $category_link = get_category_link( $category_id );
 $j2wp_post['post_content'] =  substr( $j2wp_post['post_content'], 0, $lnk_pos) . 'href="' . $category_link . '" ' . substr( $j2wp_post['post_content'], $post_lnk_end + 1);

they create the subsequent error in the assignment:

$j2wp_post['post_content'] =

Catchable fatal error: Object of class WP_Error could not be converted to string 

As there is no error in the assignment and I found a lot of hints for the categories - one of this two fundtions creates this error.

[nacin]

One of the values you are using there is a WP_Error object, and not what you expect.

My guess is it is get_category_link().