1
|
<?php
|
2
|
|
3
|
/**
|
4
|
* @file
|
5
|
* Downloading and parsing functions for Common Syndication Parser.
|
6
|
* Pillaged from FeedAPI common syndication parser.
|
7
|
*
|
8
|
* @todo Restructure. OO could work wonders here.
|
9
|
* @todo Write unit tests.
|
10
|
* @todo Keep in Feeds project or host on Drupal?
|
11
|
*/
|
12
|
|
13
|
/**
|
14
|
* Parse the feed into a data structure.
|
15
|
*
|
16
|
* @param $feed
|
17
|
* The feed object (contains the URL or the parsed XML structure.
|
18
|
* @return
|
19
|
* stdClass The structured datas extracted from the feed.
|
20
|
*/
|
21
|
function common_syndication_parser_parse($string) {
|
22
|
@ $xml = simplexml_load_string($string, NULL, LIBXML_NOERROR | LIBXML_NOWARNING | LIBXML_NOCDATA);
|
23
|
|
24
|
// Got a malformed XML.
|
25
|
if ($xml === FALSE || is_null($xml)) {
|
26
|
return FALSE;
|
27
|
}
|
28
|
$feed_type = _parser_common_syndication_feed_format_detect($xml);
|
29
|
if ($feed_type == "atom1.0") {
|
30
|
return _parser_common_syndication_atom10_parse($xml);
|
31
|
}
|
32
|
if ($feed_type == "RSS2.0" || $feed_type == "RSS0.91" || $feed_type == "RSS0.92") {
|
33
|
return _parser_common_syndication_RSS20_parse($xml);
|
34
|
}
|
35
|
if ($feed_type == "RDF") {
|
36
|
return _parser_common_syndication_RDF10_parse($xml);
|
37
|
}
|
38
|
return FALSE;
|
39
|
}
|
40
|
|
41
|
/**
|
42
|
* Determine the feed format of a SimpleXML parsed object structure.
|
43
|
*
|
44
|
* @param $xml
|
45
|
* SimpleXML-preprocessed feed.
|
46
|
* @return
|
47
|
* The feed format short description or FALSE if not compatible.
|
48
|
*/
|
49
|
function _parser_common_syndication_feed_format_detect($xml) {
|
50
|
if (!is_object($xml)) {
|
51
|
return FALSE;
|
52
|
}
|
53
|
$attr = $xml->attributes();
|
54
|
$type = strtolower($xml->getName());
|
55
|
if (isset($xml->entry) && $type == "feed") {
|
56
|
return "atom1.0";
|
57
|
}
|
58
|
if ($type == "rss" && $attr["version"] == "2.0") {
|
59
|
return "RSS2.0";
|
60
|
}
|
61
|
if ($type == "rdf" && isset($xml->channel)) {
|
62
|
return "RDF";
|
63
|
}
|
64
|
if ($type == "rss" && $attr["version"] == "0.91") {
|
65
|
return "RSS0.91";
|
66
|
}
|
67
|
if ($type == "rss" && $attr["version"] == "0.92") {
|
68
|
return "RSS0.92";
|
69
|
}
|
70
|
return FALSE;
|
71
|
}
|
72
|
|
73
|
/**
|
74
|
* Parse atom feeds.
|
75
|
*/
|
76
|
function _parser_common_syndication_atom10_parse($feed_XML) {
|
77
|
$parsed_source = array();
|
78
|
|
79
|
$ns = array(
|
80
|
"georss" => "http://www.georss.org/georss",
|
81
|
);
|
82
|
|
83
|
$base = $feed_XML->xpath("@base");
|
84
|
$base = (string) array_shift($base);
|
85
|
if (!valid_url($base, TRUE)) {
|
86
|
$base = FALSE;
|
87
|
}
|
88
|
|
89
|
// Detect the title
|
90
|
$parsed_source['title'] = isset($feed_XML->title) ? _parser_common_syndication_title("{$feed_XML->title}") : "";
|
91
|
// Detect the description
|
92
|
$parsed_source['description'] = isset($feed_XML->subtitle) ? "{$feed_XML->subtitle}" : "";
|
93
|
|
94
|
$parsed_source['link'] = _parser_common_syndication_link($feed_XML->link);
|
95
|
if (valid_url($parsed_source['link']) && !valid_url($parsed_source['link'], TRUE) && !empty($base)) {
|
96
|
$parsed_source['link'] = $base . $parsed_source['link'];
|
97
|
}
|
98
|
|
99
|
$parsed_source['items'] = array();
|
100
|
|
101
|
foreach ($feed_XML->entry as $news) {
|
102
|
|
103
|
$original_url = NULL;
|
104
|
$guid = !empty($news->id) ? "{$news->id}" : NULL;
|
105
|
if (valid_url($guid, TRUE)) {
|
106
|
$original_url = $guid;
|
107
|
}
|
108
|
|
109
|
$georss = (array)$news->children($ns["georss"]);
|
110
|
$geoname = '';
|
111
|
if (isset($georss['featureName'])) {
|
112
|
$geoname = "{$georss['featureName']}";
|
113
|
}
|
114
|
|
115
|
$latlon =
|
116
|
$lat =
|
117
|
$lon = NULL;
|
118
|
if (isset($georss['point'])) {
|
119
|
$latlon = explode(' ', $georss['point']);
|
120
|
$lat = "{$latlon[0]}";
|
121
|
$lon = "{$latlon[1]}";
|
122
|
if (!$geoname) {
|
123
|
$geoname = "{$lat} {$lon}";
|
124
|
}
|
125
|
}
|
126
|
|
127
|
$additional_taxonomies = array();
|
128
|
if (isset($news->category)) {
|
129
|
$additional_taxonomies['ATOM Categories'] = array();
|
130
|
$additional_taxonomies['ATOM Domains'] = array();
|
131
|
foreach ($news->category as $category) {
|
132
|
if (isset($category['scheme'])) {
|
133
|
$domain = "{$category['scheme']}";
|
134
|
if (!empty($domain)) {
|
135
|
if (!isset($additional_taxonomies['ATOM Domains'][$domain])) {
|
136
|
$additional_taxonomies['ATOM Domains'][$domain] = array();
|
137
|
}
|
138
|
$additional_taxonomies['ATOM Domains'][$domain][] = count($additional_taxonomies['ATOM Categories']) - 1;
|
139
|
}
|
140
|
}
|
141
|
$additional_taxonomies['ATOM Categories'][] = "{$category['term']}";
|
142
|
}
|
143
|
}
|
144
|
|
145
|
$title = "{$news->title}";
|
146
|
|
147
|
$body = '';
|
148
|
if (!empty($news->content)) {
|
149
|
foreach ($news->content->children() as $child) {
|
150
|
$body .= $child->asXML();
|
151
|
}
|
152
|
$body .= "{$news->content}";
|
153
|
}
|
154
|
elseif (!empty($news->summary)) {
|
155
|
foreach ($news->summary->children() as $child) {
|
156
|
$body .= $child->asXML();
|
157
|
}
|
158
|
$body .= "{$news->summary}";
|
159
|
}
|
160
|
|
161
|
if (!empty($news->content['src'])) {
|
162
|
// some src elements in some valid atom feeds contained no urls at all
|
163
|
if (valid_url("{$news->content['src']}", TRUE)) {
|
164
|
$original_url = "{$news->content['src']}";
|
165
|
}
|
166
|
}
|
167
|
|
168
|
$original_author = '';
|
169
|
if (!empty($news->source->author->name)) {
|
170
|
$original_author = "{$news->source->author->name}";
|
171
|
}
|
172
|
elseif (!empty($news->author->name)) {
|
173
|
$original_author = "{$news->author->name}";
|
174
|
}
|
175
|
elseif (!empty($feed_XML->author->name)) {
|
176
|
$original_author = "{$feed_XML->author->name}";
|
177
|
}
|
178
|
|
179
|
$original_url = _parser_common_syndication_link($news->link);
|
180
|
|
181
|
$item = array();
|
182
|
$item['title'] = _parser_common_syndication_title($title, $body);
|
183
|
$item['description'] = $body;
|
184
|
$item['author_name'] = $original_author;
|
185
|
|
186
|
// Fall back to updated for timestamp if both published and issued are
|
187
|
// empty.
|
188
|
if (isset($news->published)) {
|
189
|
$item['timestamp'] = _parser_common_syndication_parse_date("{$news->published}");
|
190
|
}
|
191
|
elseif (isset($news->issued)) {
|
192
|
$item['timestamp'] = _parser_common_syndication_parse_date("{$news->issued}");
|
193
|
}
|
194
|
elseif (isset($news->updated)) {
|
195
|
$item['timestamp'] = _parser_common_syndication_parse_date("{$news->updated}");
|
196
|
}
|
197
|
|
198
|
$item['url'] = trim($original_url);
|
199
|
if (valid_url($item['url']) && !valid_url($item['url'], TRUE) && !empty($base)) {
|
200
|
$item['url'] = $base . $item['url'];
|
201
|
}
|
202
|
// Fall back on URL if GUID is empty.
|
203
|
if (!empty($guid)) {
|
204
|
$item['guid'] = $guid;
|
205
|
}
|
206
|
else {
|
207
|
$item['guid'] = $item['url'];
|
208
|
}
|
209
|
$item['geolocations'] = array();
|
210
|
if ($lat && $lon) {
|
211
|
$item['geolocations'] = array(
|
212
|
array(
|
213
|
'name' => $geoname,
|
214
|
'lat' => $lat,
|
215
|
'lon' => $lon,
|
216
|
),
|
217
|
);
|
218
|
}
|
219
|
$item['tags'] = isset($additional_taxonomies['ATOM Categories']) ? $additional_taxonomies['ATOM Categories'] : array();
|
220
|
$item['domains'] = isset($additional_taxonomies['ATOM Domains']) ? $additional_taxonomies['ATOM Domains'] : array();
|
221
|
$parsed_source['items'][] = $item;
|
222
|
}
|
223
|
return $parsed_source;
|
224
|
}
|
225
|
|
226
|
/**
|
227
|
* Parse RDF Site Summary (RSS) 1.0 feeds in RDF/XML format.
|
228
|
*
|
229
|
* @see http://web.resource.org/rss/1.0/
|
230
|
*/
|
231
|
function _parser_common_syndication_RDF10_parse($feed_XML) {
|
232
|
// Declare some canonical standard prefixes for well-known namespaces:
|
233
|
static $canonical_namespaces = array(
|
234
|
'rdf' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
|
235
|
'rdfs' => 'http://www.w3.org/2000/01/rdf-schema#',
|
236
|
'xsi' => 'http://www.w3.org/2001/XMLSchema-instance#',
|
237
|
'xsd' => 'http://www.w3.org/2001/XMLSchema#',
|
238
|
'owl' => 'http://www.w3.org/2002/07/owl#',
|
239
|
'dc' => 'http://purl.org/dc/elements/1.1/',
|
240
|
'dcterms' => 'http://purl.org/dc/terms/',
|
241
|
'dcmitype' => 'http://purl.org/dc/dcmitype/',
|
242
|
'foaf' => 'http://xmlns.com/foaf/0.1/',
|
243
|
'rss' => 'http://purl.org/rss/1.0/',
|
244
|
);
|
245
|
|
246
|
// Get all namespaces declared in the feed element.
|
247
|
$namespaces = $feed_XML->getNamespaces(TRUE);
|
248
|
|
249
|
// Process the <rss:channel> resource containing feed metadata:
|
250
|
foreach ($feed_XML->children($canonical_namespaces['rss'])->channel as $rss_channel) {
|
251
|
$parsed_source = array(
|
252
|
'title' => _parser_common_syndication_title((string) $rss_channel->title),
|
253
|
'description' => (string) $rss_channel->description,
|
254
|
'link' => (string) $rss_channel->link,
|
255
|
'items' => array(),
|
256
|
);
|
257
|
break;
|
258
|
}
|
259
|
|
260
|
// Process each <rss:item> resource contained in the feed:
|
261
|
foreach ($feed_XML->children($canonical_namespaces['rss'])->item as $rss_item) {
|
262
|
|
263
|
// Extract all available RDF statements from the feed item's RDF/XML
|
264
|
// tags, allowing for both the item's attributes and child elements to
|
265
|
// contain RDF properties:
|
266
|
$rdf_data = array();
|
267
|
foreach ($namespaces as $ns => $ns_uri) {
|
268
|
// Note that we attempt to normalize the found property name
|
269
|
// namespaces to well-known 'standard' prefixes where possible, as the
|
270
|
// feed may in principle use any arbitrary prefixes and we should
|
271
|
// still be able to correctly handle it.
|
272
|
foreach ($rss_item->attributes($ns_uri) as $attr_name => $attr_value) {
|
273
|
$ns_prefix = ($ns_prefix = array_search($ns_uri, $canonical_namespaces)) ? $ns_prefix : $ns;
|
274
|
$rdf_data[$ns_prefix . ':' . $attr_name][] = (string) $attr_value;
|
275
|
}
|
276
|
foreach ($rss_item->children($ns_uri) as $rss_property) {
|
277
|
$ns_prefix = ($ns_prefix = array_search($ns_uri, $canonical_namespaces)) ? $ns_prefix : $ns;
|
278
|
$rdf_data[$ns_prefix . ':' . $rss_property->getName()][] = (string) $rss_property;
|
279
|
}
|
280
|
}
|
281
|
|
282
|
// Declaratively define mappings that determine how to construct the result object.
|
283
|
$item = _parser_common_syndication_RDF10_item($rdf_data, array(
|
284
|
'title' => array('rss:title', 'dc:title'),
|
285
|
'description' => array('rss:description', 'dc:description', 'content:encoded'),
|
286
|
'url' => array('rss:link', 'rdf:about'),
|
287
|
'author_name' => array('dc:creator', 'dc:publisher'),
|
288
|
'guid' => 'rdf:about',
|
289
|
'timestamp' => 'dc:date',
|
290
|
'tags' => 'dc:subject'
|
291
|
));
|
292
|
|
293
|
// Special handling for the title:
|
294
|
$item['title'] = _parser_common_syndication_title($item['title'], $item['description']);
|
295
|
|
296
|
// Parse any date/time values into Unix timestamps:
|
297
|
$item['timestamp'] = _parser_common_syndication_parse_date($item['timestamp']);
|
298
|
|
299
|
// If no GUID found, use the URL of the feed.
|
300
|
if (empty($item['guid'])) {
|
301
|
$item['guid'] = $item['url'];
|
302
|
}
|
303
|
|
304
|
// Add every found RDF property to the feed item.
|
305
|
$item['rdf'] = array();
|
306
|
foreach ($rdf_data as $rdf_property => $rdf_value) {
|
307
|
// looks nicer in the mapper UI
|
308
|
// @todo Revisit, not used with feedapi mapper anymore.
|
309
|
$rdf_property = str_replace(':', '_', $rdf_property);
|
310
|
$item['rdf'][$rdf_property] = $rdf_value;
|
311
|
}
|
312
|
|
313
|
$parsed_source['items'][] = $item;
|
314
|
}
|
315
|
|
316
|
return $parsed_source;
|
317
|
}
|
318
|
|
319
|
function _parser_common_syndication_RDF10_property($rdf_data, $rdf_properties = array()) {
|
320
|
$rdf_properties = is_array($rdf_properties) ? $rdf_properties : array_slice(func_get_args(), 1);
|
321
|
foreach ($rdf_properties as $rdf_property) {
|
322
|
if ($rdf_property && !empty($rdf_data[$rdf_property])) {
|
323
|
// remove empty strings
|
324
|
return array_filter($rdf_data[$rdf_property], 'strlen');
|
325
|
}
|
326
|
}
|
327
|
}
|
328
|
|
329
|
function _parser_common_syndication_RDF10_item($rdf_data, $mappings) {
|
330
|
foreach ($mappings as $k => $v) {
|
331
|
$values = _parser_common_syndication_RDF10_property($rdf_data, $v);
|
332
|
$mappings[$k] = !is_array($values) || count($values) > 1 ? $values : reset($values);
|
333
|
}
|
334
|
return $mappings;
|
335
|
}
|
336
|
|
337
|
/**
|
338
|
* Parse RSS2.0 feeds.
|
339
|
*/
|
340
|
function _parser_common_syndication_RSS20_parse($feed_XML) {
|
341
|
|
342
|
$ns = array(
|
343
|
"content" => "http://purl.org/rss/1.0/modules/content/",
|
344
|
"dc" => "http://purl.org/dc/elements/1.1/",
|
345
|
"georss" => "http://www.georss.org/georss",
|
346
|
);
|
347
|
|
348
|
$parsed_source = array();
|
349
|
// Detect the title.
|
350
|
$parsed_source['title'] = isset($feed_XML->channel->title) ? _parser_common_syndication_title("{$feed_XML->channel->title}") : "";
|
351
|
// Detect the description.
|
352
|
$parsed_source['description'] = isset($feed_XML->channel->description) ? "{$feed_XML->channel->description}" : "";
|
353
|
// Detect the link.
|
354
|
$parsed_source['link'] = isset($feed_XML->channel->link) ? "{$feed_XML->channel->link}" : "";
|
355
|
$parsed_source['items'] = array();
|
356
|
|
357
|
foreach ($feed_XML->xpath('//item') as $news) {
|
358
|
$title = $body = $original_author = $original_url = $guid = '';
|
359
|
|
360
|
$category = $news->xpath('category');
|
361
|
// Get children for current namespace.
|
362
|
$content = (array)$news->children($ns["content"]);
|
363
|
$dc = (array)$news->children($ns["dc"]);
|
364
|
$georss = (array)$news->children($ns["georss"]);
|
365
|
$news = (array) $news;
|
366
|
$news['category'] = $category;
|
367
|
|
368
|
if (isset($news['title'])) {
|
369
|
$title = "{$news['title']}";
|
370
|
}
|
371
|
|
372
|
if (isset($news['description'])) {
|
373
|
$body = "{$news['description']}";
|
374
|
}
|
375
|
// Some sources use content:encoded as description i.e.
|
376
|
// PostNuke PageSetter module.
|
377
|
if (isset($news['encoded'])) { // content:encoded for PHP < 5.1.2.
|
378
|
if (strlen($body) < strlen("{$news['encoded']}")) {
|
379
|
$body = "{$news['encoded']}";
|
380
|
}
|
381
|
}
|
382
|
if (isset($content['encoded'])) { // content:encoded for PHP >= 5.1.2.
|
383
|
if (strlen($body) < strlen("{$content['encoded']}")) {
|
384
|
$body = "{$content['encoded']}";
|
385
|
}
|
386
|
}
|
387
|
if (!isset($body)) {
|
388
|
$body = "{$news['title']}";
|
389
|
}
|
390
|
|
391
|
if (!empty($news['author'])) {
|
392
|
$original_author = "{$news['author']}";
|
393
|
}
|
394
|
elseif (!empty($dc["creator"])) {
|
395
|
$original_author = (string)$dc["creator"];
|
396
|
}
|
397
|
|
398
|
if (!empty($news['link'])) {
|
399
|
$original_url = "{$news['link']}";
|
400
|
$guid = $original_url;
|
401
|
}
|
402
|
|
403
|
if (!empty($news['guid'])) {
|
404
|
$guid = "{$news['guid']}";
|
405
|
}
|
406
|
|
407
|
if (!empty($georss['featureName'])) {
|
408
|
$geoname = "{$georss['featureName']}";
|
409
|
}
|
410
|
|
411
|
$lat =
|
412
|
$lon =
|
413
|
$latlon =
|
414
|
$geoname = NULL;
|
415
|
if (!empty($georss['point'])) {
|
416
|
$latlon = explode(' ', $georss['point']);
|
417
|
$lat = "{$latlon[0]}";
|
418
|
$lon = "{$latlon[1]}";
|
419
|
if (!$geoname) {
|
420
|
$geoname = "$lat $lon";
|
421
|
}
|
422
|
}
|
423
|
|
424
|
$additional_taxonomies = array();
|
425
|
$additional_taxonomies['RSS Categories'] = array();
|
426
|
$additional_taxonomies['RSS Domains'] = array();
|
427
|
if (isset($news['category'])) {
|
428
|
foreach ($news['category'] as $category) {
|
429
|
$additional_taxonomies['RSS Categories'][] = "{$category}";
|
430
|
if (isset($category['domain'])) {
|
431
|
$domain = "{$category['domain']}";
|
432
|
if (!empty($domain)) {
|
433
|
if (!isset($additional_taxonomies['RSS Domains'][$domain])) {
|
434
|
$additional_taxonomies['RSS Domains'][$domain] = array();
|
435
|
}
|
436
|
$additional_taxonomies['RSS Domains'][$domain][] = count($additional_taxonomies['RSS Categories']) - 1;
|
437
|
}
|
438
|
}
|
439
|
}
|
440
|
}
|
441
|
|
442
|
$item = array();
|
443
|
$item['title'] = _parser_common_syndication_title($title, $body);
|
444
|
$item['description'] = $body;
|
445
|
$item['author_name'] = $original_author;
|
446
|
if (!empty($news['pubDate'])) {
|
447
|
$item['timestamp'] = _parser_common_syndication_parse_date($news['pubDate']);
|
448
|
}
|
449
|
elseif (!empty($dc['date'])) {
|
450
|
$item['timestamp'] = _parser_common_syndication_parse_date($dc['date']);
|
451
|
}
|
452
|
else {
|
453
|
$item['timestamp'] = time();
|
454
|
}
|
455
|
$item['url'] = trim($original_url);
|
456
|
$item['guid'] = $guid;
|
457
|
|
458
|
$item['geolocations'] = array();
|
459
|
if (isset($geoname, $lat, $lon)) {
|
460
|
$item['geolocations'] = array(
|
461
|
array(
|
462
|
'name' => $geoname,
|
463
|
'lat' => $lat,
|
464
|
'lon' => $lon,
|
465
|
),
|
466
|
);
|
467
|
}
|
468
|
|
469
|
$item['domains'] = $additional_taxonomies['RSS Domains'];
|
470
|
$item['tags'] = $additional_taxonomies['RSS Categories'];
|
471
|
$parsed_source['items'][] = $item;
|
472
|
}
|
473
|
return $parsed_source;
|
474
|
}
|
475
|
|
476
|
/**
|
477
|
* Parse a date comes from a feed.
|
478
|
*
|
479
|
* @param $date_string
|
480
|
* The date string in various formats.
|
481
|
* @return
|
482
|
* The timestamp of the string or the current time if can't be parsed
|
483
|
*/
|
484
|
function _parser_common_syndication_parse_date($date_str) {
|
485
|
// PHP < 5.3 doesn't like the GMT- notation for parsing timezones.
|
486
|
$date_str = str_replace('GMT-', '-', $date_str);
|
487
|
$date_str = str_replace('GMT+', '+', $date_str);
|
488
|
$parsed_date = strtotime($date_str);
|
489
|
|
490
|
if ($parsed_date === FALSE || $parsed_date == -1) {
|
491
|
$parsed_date = _parser_common_syndication_parse_w3cdtf($date_str);
|
492
|
}
|
493
|
|
494
|
if (($parsed_date === FALSE || $parsed_date == -1)) {
|
495
|
// PHP does not support the UT timezone. Fake it. The system that generated
|
496
|
// this, Google Groups, probably meant UTC.
|
497
|
$date_str = strtolower(trim($date_str));
|
498
|
$last_three = substr($date_str, strlen($date_str) - 3, 3);
|
499
|
|
500
|
if ($last_three == ' ut') {
|
501
|
$parsed_date = strtotime($date_str . 'c');
|
502
|
}
|
503
|
}
|
504
|
|
505
|
return $parsed_date === FALSE ? time() : $parsed_date;
|
506
|
}
|
507
|
|
508
|
/**
|
509
|
* Parse the W3C date/time format, a subset of ISO 8601.
|
510
|
*
|
511
|
* PHP date parsing functions do not handle this format.
|
512
|
* See http://www.w3.org/TR/NOTE-datetime for more information.
|
513
|
* Originally from MagpieRSS (http://magpierss.sourceforge.net/).
|
514
|
*
|
515
|
* @param $date_str
|
516
|
* A string with a potentially W3C DTF date.
|
517
|
* @return
|
518
|
* A timestamp if parsed successfully or FALSE if not.
|
519
|
*/
|
520
|
function _parser_common_syndication_parse_w3cdtf($date_str) {
|
521
|
if (preg_match('/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/', $date_str, $match)) {
|
522
|
list($year, $month, $day, $hours, $minutes, $seconds) = array($match[1], $match[2], $match[3], $match[4], $match[5], $match[6]);
|
523
|
// Calculate the epoch for current date assuming GMT.
|
524
|
$epoch = gmmktime($hours, $minutes, $seconds, $month, $day, $year);
|
525
|
if ($match[10] != 'Z') { // Z is zulu time, aka GMT
|
526
|
list($tz_mod, $tz_hour, $tz_min) = array($match[8], $match[9], $match[10]);
|
527
|
// Zero out the variables.
|
528
|
if (!$tz_hour) {
|
529
|
$tz_hour = 0;
|
530
|
}
|
531
|
if (!$tz_min) {
|
532
|
$tz_min = 0;
|
533
|
}
|
534
|
$offset_secs = (($tz_hour * 60) + $tz_min) * 60;
|
535
|
// Is timezone ahead of GMT? If yes, subtract offset.
|
536
|
if ($tz_mod == '+') {
|
537
|
$offset_secs *= -1;
|
538
|
}
|
539
|
$epoch += $offset_secs;
|
540
|
}
|
541
|
return $epoch;
|
542
|
}
|
543
|
else {
|
544
|
return FALSE;
|
545
|
}
|
546
|
}
|
547
|
|
548
|
/**
|
549
|
* Extract the link that points to the original content (back to site or
|
550
|
* original article)
|
551
|
*
|
552
|
* @param $links
|
553
|
* Array of SimpleXML objects
|
554
|
*/
|
555
|
function _parser_common_syndication_link($links) {
|
556
|
$to_link = '';
|
557
|
if (count($links) > 0) {
|
558
|
foreach ($links as $link) {
|
559
|
$link = $link->attributes();
|
560
|
$to_link = isset($link["href"]) ? "{$link["href"]}" : "";
|
561
|
if (isset($link["rel"])) {
|
562
|
if ("{$link["rel"]}" == 'alternate') {
|
563
|
break;
|
564
|
}
|
565
|
}
|
566
|
}
|
567
|
}
|
568
|
return $to_link;
|
569
|
}
|
570
|
|
571
|
/**
|
572
|
* Prepare raw data to be a title
|
573
|
*/
|
574
|
function _parser_common_syndication_title($title, $body = FALSE) {
|
575
|
if (empty($title) && !empty($body)) {
|
576
|
// Explode to words and use the first 3 words.
|
577
|
$words = preg_split('/[\s,]+/', strip_tags($body));
|
578
|
$title = implode(' ', array_slice($words, 0, 3));
|
579
|
}
|
580
|
return $title;
|
581
|
}
|