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wordpress-azure/wp-trackback.php at master · johnwc/wordpress-azure · GitHub
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<?php
/**
* Handle Trackbacks and Pingbacks Sent to WordPress
*
* @since 0.71
*
* @package WordPress
* @subpackage Trackbacks
*/
if
(
empty
(
$
wp
) ) {
require_once
__DIR__
.
'
/wp-load.php
'
;
wp
(
array
(
'
tb
'
=>
'
1
'
) );
}
// Always run as an unauthenticated user.
wp_set_current_user
(
0
);
/**
* Response to a trackback.
*
* Responds with an error or success XML message.
*
* @since 0.71
*
* @param int|bool $error Whether there was an error.
* Default '0'. Accepts '0' or '1', true or false.
* @param string $error_message Error message if an error occurred. Default empty string.
*/
function
trackback_response
(
$
error
=
0
,
$
error_message
=
''
) {
header
(
'
Content-Type: text/xml; charset=
'
.
get_option
(
'
blog_charset
'
) );
if
(
$
error
) {
echo
'
<?xml version="1.0" encoding="utf-8"?
'
.
"
>
\n"
;
echo
"
<response>
\n"
;
echo
"
<error>1</error>
\n"
;
echo
"
<message>
$
error_message
</message>
\n"
;
echo
'
</response>
'
;
die
();
}
else
{
echo
'
<?xml version="1.0" encoding="utf-8"?
'
.
"
>
\n"
;
echo
"
<response>
\n"
;
echo
"
<error>0</error>
\n"
;
echo
'
</response>
'
;
}
}
if
( !
isset
(
$
_GET
[
'
tb_id
'
] ) || !
$
_GET
[
'
tb_id
'
] ) {
$
post_id
=
explode
(
'
/
'
,
$
_SERVER
[
'
REQUEST_URI
'
] );
$
post_id
= (
int
)
$
post_id
[
count
(
$
post_id
) -
1
];
}
$
trackback_url
=
isset
(
$
_POST
[
'
url
'
] ) ?
$
_POST
[
'
url
'
] :
''
;
$
charset
=
isset
(
$
_POST
[
'
charset
'
] ) ?
$
_POST
[
'
charset
'
] :
''
;
// These three are stripslashed here so they can be properly escaped after mb_convert_encoding().
$
title
=
isset
(
$
_POST
[
'
title
'
] ) ?
wp_unslash
(
$
_POST
[
'
title
'
] ) :
''
;
$
excerpt
=
isset
(
$
_POST
[
'
excerpt
'
] ) ?
wp_unslash
(
$
_POST
[
'
excerpt
'
] ) :
''
;
$
blog_name
=
isset
(
$
_POST
[
'
blog_name
'
] ) ?
wp_unslash
(
$
_POST
[
'
blog_name
'
] ) :
''
;
if
(
$
charset
) {
$
charset
=
str_replace
(
array
(
'
,
'
,
'
'
),
''
,
strtoupper
(
trim
(
$
charset
) ) );
}
else
{
$
charset
=
'
ASCII, UTF-8, ISO-8859-1, JIS, EUC-JP, SJIS
'
;
}
// No valid uses for UTF-7.
if
(
false
!==
strpos
(
$
charset
,
'
UTF-7
'
) ) {
die;
}
// For international trackbacks.
if
(
function_exists
(
'
mb_convert_encoding
'
) ) {
$
title
=
mb_convert_encoding
(
$
title
,
get_option
(
'
blog_charset
'
),
$
charset
);
$
excerpt
=
mb_convert_encoding
(
$
excerpt
,
get_option
(
'
blog_charset
'
),
$
charset
);
$
blog_name
=
mb_convert_encoding
(
$
blog_name
,
get_option
(
'
blog_charset
'
),
$
charset
);
}
// Escape values to use in the trackback.
$
title
=
wp_slash
(
$
title
);
$
excerpt
=
wp_slash
(
$
excerpt
);
$
blog_name
=
wp_slash
(
$
blog_name
);
if
(
is_single
() ||
is_page
() ) {
$
post_id
=
$
posts
[
0
]->
ID
;
}
if
( !
isset
(
$
post_id
) || ! (
int
)
$
post_id
) {
trackback_response
(
1
,
__
(
'
I really need an ID for this to work.
'
) );
}
if
(
empty
(
$
title
) &&
empty
(
$
trackback_url
) &&
empty
(
$
blog_name
) ) {
// If it doesn't look like a trackback at all.
wp_redirect
(
get_permalink
(
$
post_id
) );
exit
;
}
if
( !
empty
(
$
trackback_url
) && !
empty
(
$
title
) ) {
/**
* Fires before the trackback is added to a post.
*
* @since 4.7.0
*
* @param int $post_id Post ID related to the trackback.
* @param string $trackback_url Trackback URL.
* @param string $charset Character set.
* @param string $title Trackback title.
* @param string $excerpt Trackback excerpt.
* @param string $blog_name Blog name.
*/
do_action
(
'
pre_trackback_post
'
,
$
post_id
,
$
trackback_url
,
$
charset
,
$
title
,
$
excerpt
,
$
blog_name
);
header
(
'
Content-Type: text/xml; charset=
'
.
get_option
(
'
blog_charset
'
) );
if
( !
pings_open
(
$
post_id
) ) {
trackback_response
(
1
,
__
(
'
Sorry, trackbacks are closed for this item.
'
) );
}
$
title
=
wp_html_excerpt
(
$
title
,
250
,
'
…
'
);
$
excerpt
=
wp_html_excerpt
(
$
excerpt
,
252
,
'
…
'
);
$
comment_post_id
= (
int
)
$
post_id
;
$
comment_author
=
$
blog_name
;
$
comment_author_email
=
''
;
$
comment_author_url
=
$
trackback_url
;
$
comment_content
=
"
<strong>
$
title
</strong>
\n\n
$
excerpt
"
;
$
comment_type
=
'
trackback
'
;
$
dupe
=
$
wpdb
->
get_results
(
$
wpdb
->
prepare
(
"
SELECT * FROM
$
wpdb
->
comments
WHERE comment_post_ID = %d AND comment_author_url = %s
"
,
$
comment_post_id
,
$
comment_author_url
)
);
if
(
$
dupe
) {
trackback_response
(
1
,
__
(
'
There is already a ping from that URL for this post.
'
) );
}
$
commentdata
=
array
(
'
comment_post_ID
'
=>
$
comment_post_id
,
);
$
commentdata
+=
compact
(
'
comment_author
'
,
'
comment_author_email
'
,
'
comment_author_url
'
,
'
comment_content
'
,
'
comment_type
'
);
$
result
=
wp_new_comment
(
$
commentdata
);
if
(
is_wp_error
(
$
result
) ) {
trackback_response
(
1
,
$
result
->
get_error_message
() );
}
$
trackback_id
=
$
wpdb
->
insert_id
;
/**
* Fires after a trackback is added to a post.
*
* @since 1.2.0
*
* @param int $trackback_id Trackback ID.
*/
do_action
(
'
trackback_post
'
,
$
trackback_id
);
trackback_response
(
0
);
}
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