Export function does not properly escape ]]> (CDATA)

[ceefour]

1. Create a post with <![CDATA[ ... ]]> in it (raw form)
2. Export the WordPress data as WXR.

The resulting WXR is not well-formed and is not readable.

[ceefour]

Related to #7400 (Import hardcodes CDATA syntax)

[ceefour]

]]>

should be escaped as

]]]]><![CDATA[>

[ceefour]

File to fix is wp-admin/includes/wordpress.php in wxr_cdata() function

[ceefour]

Patch to fix export (this makes WXR readable to XML-compliant importers, but perhaps not WordPress's own importer)

[duck_]

I had thought of this whilst preparing for #15197, but obviously forgot about it. Though I cannot reproduce using your steps above, since the > is encoded as > in the output file, there is a possibility of this happening in other circumstances (see #15294).

Before this can go in, I believe the regular expression based importer might have to be updated.

[westi]

duck_ is this ticket still relevant or can it be closed?

[duck_]

Regex parser need to understand escaped ]]>

[duck_]

It needs to work for old exports too

[duck_]

In [19858]:

Export valid XML by escaping the closing CDATA sequence "]]>". Props ceefour. See #15203.

[duck_]

In [19859]:

Bump WXR_VERSION because of r19858 which affects the regex based importer. See #15203.

[duck_]

​http://plugins.trac.wordpress.org/changeset/501867

[archon810]

Just wanted to stop by here and say that I had the issue due to having CDATA tags in post content, which broke XML, applied the fix manually (as WP 3.4 isn't out yet), and verified the final XML validates. Thanks, everyone.