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jetpack / modules / shortcodes / youtube.php

youtube.php in Jetpack – WP Security, Backup, Speed, & Growth 4.2.5, at modules/shortcodes/youtube.php

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1 <?php
2
3 /**
4 * youtube shortcode
5 *
6 * Contains shortcode + some improvements over the Embeds syntax @
7 * http://codex.wordpress.org/Embeds
8 *
9 * @example [youtube=http://www.youtube.com/watch?v=wq0rXGLs0YM&amp;fs=1&amp;hl=bg_BG]
10 */
11
12 /**
13 * Replaces YouTube embeds with YouTube shortcodes.
14 *
15 * @param string $content HTML content.
16 * @return string The content with YouTube embeds replaced with YouTube shortcodes.
17 */
18 // 2008-07-15:
19 //<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/bZBHZT3a-FA&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><embed src="http://www.youtube.com/v/bZBHZT3a-FA&hl=en&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>
20 // around 2008-06-06 youtube changed their old embed code to this:
21 //<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/M1D30gS7Z8U&hl=en"></param><embed src="http://www.youtube.com/v/M1D30gS7Z8U&hl=en" type="application/x-shockwave-flash" width="425" height="344"></embed></object>
22 // old style was:
23 // <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/dGY28Qbj76A&rel=0"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/dGY28Qbj76A&rel=0" type="application/x-shockwave-flash" wmode="transparent" width="425" height="344"></embed></object>
24 // 12-2010:
25 // <object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/3H8bnKdf654?fs=1&amp;hl=en_GB"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/3H8bnKdf654?fs=1&amp;hl=en_GB" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>
26 // 01-2011:
27 // <iframe title="YouTube video player" class="youtube-player" type="text/html" width="640" height="390" src="http://www.youtube.com/embed/Qq9El3ki0_g" frameborder="0" allowFullScreen></iframe>
28 // <iframe class="youtube-player" type="text/html" width="640" height="385" src="http://www.youtube.com/embed/VIDEO_ID" frameborder="0"></iframe>
29
30 function youtube_embed_to_short_code( $content ) {
31 if ( false === strpos( $content, 'youtube.com' ) )
32 return $content;
33
34 //older codes
35 $regexp = '!<object width="\d+" height="\d+"><param name="movie" value="https?://www\.youtube\.com/v/([^"]+)"></param>(?:<param name="\w+" value="[^"]*"></param>)*<embed src="https?://www\.youtube\.com/v/(.+)" type="application/x-shockwave-flash"(?: \w+="[^"]*")* width="\d+" height="\d+"></embed></object>!i';
36 $regexp_ent = htmlspecialchars( $regexp, ENT_NOQUOTES );
37 $old_regexp = '!<embed(?:\s+\w+="[^"]*")*\s+src="https?(?:\:|&#0*58;)//www\.youtube\.com/v/([^"]+)"(?:\s+\w+="[^"]*")*\s*(?:/>|>\s*</embed>)!';
38 $old_regexp_ent = str_replace( '&amp;#0*58;', '&amp;#0*58;|&#0*58;', htmlspecialchars( $old_regexp, ENT_NOQUOTES ) );
39
40 //new code
41 $ifr_regexp = '!<iframe((?:\s+\w+="[^"]*")*?)\s+src="(https?:)?//(?:www\.)*youtube.com/embed/([^"]+)".*?</iframe>!i';
42 $ifr_regexp_ent = str_replace( '&amp;#0*58;', '&amp;#0*58;|&#0*58;', htmlspecialchars( $ifr_regexp, ENT_NOQUOTES ) );
43
44 foreach ( array( 'regexp', 'regexp_ent', 'old_regexp', 'old_regexp_ent', 'ifr_regexp', 'ifr_regexp_ent' ) as $reg ) {
45 if ( ! preg_match_all( $$reg, $content, $matches, PREG_SET_ORDER ) )
46 continue;
47
48 foreach ( $matches as $match ) {
49 // Hack, but '?' should only ever appear once, and
50 // it should be for the 1st field-value pair in query string,
51 // if it is present
52 // YouTube changed their embed code.
53 // Example of how it is now:
54 // <object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/aP9AaD4tgBY?fs=1&amp;hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/aP9AaD4tgBY?fs=1&amp;hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>
55 // As shown at the start of function, previous YouTube didn't '?'
56 // the 1st field-value pair.
57 if ( in_array ( $reg, array( 'ifr_regexp', 'ifr_regexp_ent' ) ) ) {
58 $params = $match[1];
59
60 if ( 'ifr_regexp_ent' == $reg )
61 $params = html_entity_decode( $params );
62
63 $params = wp_kses_hair( $params, array( 'http' ) );
64
65 $width = isset( $params['width'] ) ? (int) $params['width']['value'] : 0;
66 $height = isset( $params['height'] ) ? (int) $params['height']['value'] : 0;
67 $wh = '';
68
69 if ( $width && $height )
70 $wh = "&w=$width&h=$height";
71
72 $url = esc_url_raw( "https://www.youtube.com/watch?v={$match[3]}{$wh}" );
73 } else {
74 $match[1] = str_replace( '?', '&', $match[1] );
75
76 $url = esc_url_raw( "https://www.youtube.com/watch?v=" . html_entity_decode( $match[1] ) );
77 }
78
79 $content = str_replace( $match[0], "[youtube $url]", $content );
80
81 /**
82 * Fires before the YouTube embed is transformed into a shortcode.
83 *
84 * @module shortcodes
85 *
86 * @since 1.2.0
87 *
88 * @param string youtube Shortcode name.
89 * @param string $url YouTube video URL.
90 */
91 do_action( 'jetpack_embed_to_shortcode', 'youtube', $url );
92 }
93 }
94
95 return $content;
96 }
97
98 add_filter( 'pre_kses', 'youtube_embed_to_short_code' );
99
100 /**
101 * Replaces plain-text links to YouTube videos with YouTube embeds.
102 *
103 * @param string $content HTML content
104 * @return string The content with embeds instead of URLs
105 */
106 function youtube_link( $content ) {
107 return jetpack_preg_replace_callback_outside_tags( '!(?:\n|\A)https?://(?:www\.)?(?:youtube.com/(?:v/|playlist|watch[/\#?])|youtu\.be/)[^\s]+?(?:\n|\Z)!i', 'youtube_link_callback', $content, 'youtube.com/' );
108 }
109
110 /**
111 * Callback function for the regex that replaces YouTube URLs with
112 * YouTube embeds.
113 */
114 function youtube_link_callback( $matches ) {
115 return "\n" . youtube_id( $matches[0] ) . "\n";
116 }
117
118 /**
119 * Normalizes a YouTube URL to include a v= parameter and a query string free of encoded ampersands.
120 *
121 * @param string $url
122 * @return string The normalized URL
123 */
124 if ( ! function_exists( 'youtube_sanitize_url' ) ) :
125 function youtube_sanitize_url( $url ) {
126 $url = trim( $url, ' "' );
127 $url = trim( $url );
128 $url = str_replace( array( 'youtu.be/', '/v/', '#!v=', '&amp;', '&#038;', 'playlist' ), array( 'youtu.be/?v=', '/?v=', '?v=', '&', '&', 'videoseries' ), $url );
129
130 // Replace any extra question marks with ampersands - the result of a URL like "http://www.youtube.com/v/9FhMMmqzbD8?fs=1&hl=en_US" being passed in.
131 $query_string_start = strpos( $url, "?" );
132
133 if ( false !== $query_string_start ) {
134 $url = substr( $url, 0, $query_string_start + 1 ) . str_replace( "?", "&", substr( $url, $query_string_start + 1 ) );
135 }
136
137 return $url;
138 }
139 endif;
140
141 /*
142 * url can be:
143 * http://www.youtube.com/embed/videoseries?list=PL94269DA08231042B&amp;hl=en_US
144 * http://www.youtube.com/watch#!v=H2Ncxw1xfck
145 * http://www.youtube.com/watch?v=H2Ncxw1xfck
146 * http://www.youtube.com/watch?v=H2Ncxw1xfck&w=320&h=240&fmt=1&rel=0&showsearch=1&hd=0
147 * http://www.youtube.com/v/jF-kELmmvgA
148 * http://www.youtube.com/v/9FhMMmqzbD8?fs=1&hl=en_US
149 * http://youtu.be/Rrohlqeir5E
150 */
151
152 /**
153 * Converts a YouTube URL into an embedded YouTube video.
154 */
155 function youtube_id( $url ) {
156 if ( ! $id = jetpack_get_youtube_id( $url ) )
157 return '<!--YouTube Error: bad URL entered-->';
158
159 $url = youtube_sanitize_url( $url );
160 $url = parse_url( $url );
161
162 if ( ! isset( $url['query'] ) )
163 return false;
164
165 if ( isset( $url['fragment'] ) ) {
166 wp_parse_str( $url['fragment'], $fargs );
167 } else {
168 $fargs = array();
169 }
170 wp_parse_str( $url['query'], $qargs );
171
172 $qargs = array_merge( $fargs, $qargs );
173
174 // calculate the width and height, taking content_width into consideration
175 global $content_width;
176
177 $input_w = ( isset( $qargs['w'] ) && intval( $qargs['w'] ) ) ? intval( $qargs['w'] ) : 0;
178 $input_h = ( isset( $qargs['h'] ) && intval( $qargs['h'] ) ) ? intval( $qargs['h'] ) : 0;
179
180 // If we have $content_width, use it.
181 if ( ! empty( $content_width ) ) {
182 $default_width = $content_width;
183 } else {
184 // Otherwise get default width from the old, now deprecated embed_size_w option.
185 $default_width = get_option('embed_size_w');
186 }
187
188 // If we don't know those 2 values use a hardcoded width.h
189 if ( empty( $default_width ) ) {
190 $default_width = 640;
191 }
192
193 if ( $input_w > 0 && $input_h > 0 ) {
194 $w = $input_w;
195 $h = $input_h;
196 } elseif ( 0 == $input_w && 0 == $input_h ) {
197 if ( isset( $qargs['fmt'] ) && intval( $qargs['fmt'] ) ) {
198 $w = ( ! empty( $content_width ) ? min( $content_width, 480 ) : 480 );
199 } else {
200 $w = ( ! empty( $content_width ) ? min( $content_width, $default_width ) : $default_width );
201 $h = ceil( ( $w / 16 ) * 9 ) + 30;
202 }
203 } elseif ( $input_w > 0 ) {
204 $w = $input_w;
205 $h = ceil( ( $w / 16 ) * 9 ) + 30;
206 } else {
207 if ( isset( $qargs['fmt'] ) && intval( $qargs['fmt'] ) ) {
208 $w = ( ! empty( $content_width ) ? min( $content_width, 480 ) : 480 );
209 } else {
210 $w = ( ! empty( $content_width ) ? min( $content_width, $default_width ) : $default_width );
211 $h = $input_h;
212 }
213 }
214
215 /**
216 * Filter the YouTube player width.
217 *
218 * @module shortcodes
219 *
220 * @since 1.1.0
221 *
222 * @param int $w Width of the YouTube player in pixels.
223 */
224 $w = (int) apply_filters( 'youtube_width', $w );
225
226 /**
227 * Filter the YouTube player height.
228 *
229 * @module shortcodes
230 *
231 * @since 1.1.0
232 *
233 * @param int $h Height of the YouTube player in pixels.
234 */
235 $h = (int) apply_filters( 'youtube_height', $h );
236
237 $rel = ( isset( $qargs['rel'] ) && 0 == $qargs['rel'] ) ? 0 : 1;
238 $search = ( isset( $qargs['showsearch'] ) && 1 == $qargs['showsearch'] ) ? 1 : 0;
239 $info = ( isset( $qargs['showinfo'] ) && 0 == $qargs['showinfo'] ) ? 0 : 1;
240 $iv = ( isset( $qargs['iv_load_policy'] ) && 3 == $qargs['iv_load_policy'] ) ? 3 : 1;
241
242 $fmt = ( isset( $qargs['fmt'] ) && intval( $qargs['fmt'] ) ) ? '&fmt=' . (int) $qargs['fmt'] : '';
243
244 if ( ! isset( $qargs['autohide'] ) || ( $qargs['autohide'] < 0 || 2 < $qargs['autohide'] ) ) {
245 $autohide = '&autohide=2';
246 } else {
247 $autohide = '&autohide=' . absint( $qargs['autohide'] );
248 }
249
250 $start = 0;
251 if ( isset( $qargs['start'] ) ) {
252 $start = intval( $qargs['start'] );
253 } else if ( isset( $qargs['t'] ) ) {
254 $time_pieces = preg_split( '/(?<=\D)(?=\d+)/', $qargs['t'] );
255
256 foreach ( $time_pieces as $time_piece ) {
257 $int = (int) $time_piece;
258 switch ( substr( $time_piece, -1 ) ) {
259 case 'h' :
260 $start += $int * 3600;
261 break;
262 case 'm' :
263 $start += $int * 60;
264 break;
265 case 's' :
266 $start += $int;
267 break;
268 }
269 }
270 }
271
272 $start = $start ? '&start=' . $start : '';
273 $end = ( isset( $qargs['end'] ) && intval( $qargs['end'] ) ) ? '&end=' . (int) $qargs['end'] : '';
274 $hd = ( isset( $qargs['hd'] ) && intval( $qargs['hd'] ) ) ? '&hd=' . (int) $qargs['hd'] : '';
275
276 $vq = ( isset( $qargs['vq'] ) && in_array( $qargs['vq'], array('hd720','hd1080') ) ) ? '&vq=' . $qargs['vq'] : '';
277
278 $cc = ( isset( $qargs['cc_load_policy'] ) ) ? '&cc_load_policy=1' : '';
279 $cc_lang = ( isset( $qargs['cc_lang_pref'] ) ) ? '&cc_lang_pref=' . preg_replace( '/[^_a-z0-9-]/i', '', $qargs['cc_lang_pref'] ) : '';
280
281 $wmode = ( isset( $qargs['wmode'] ) && in_array( strtolower( $qargs['wmode'] ), array( 'opaque', 'window', 'transparent' ) ) ) ? $qargs['wmode'] : 'transparent';
282
283 $theme = ( isset( $qargs['theme'] ) && in_array( strtolower( $qargs['theme'] ), array( 'dark', 'light' ) ) ) ? '&theme=' . $qargs['theme'] : '';
284
285 $autoplay = '';
286 /**
287 * Allow YouTube videos to start playing automatically.
288 *
289 * @module shortcodes
290 *
291 * @since 2.2.2
292 *
293 * @param bool false Enable autoplay for YouTube videos.
294 */
295 if ( apply_filters( 'jetpack_youtube_allow_autoplay', false ) && isset( $qargs['autoplay'] ) )
296 $autoplay = '&autoplay=' . (int)$qargs['autoplay'];
297
298 if ( ( isset( $url['path'] ) && '/videoseries' == $url['path'] ) || isset( $qargs['list'] ) ) {
299 $html = "<iframe class='youtube-player' type='text/html' width='$w' height='$h' src='" . esc_url( set_url_scheme( "http://www.youtube.com/embed/videoseries?list=$id&hl=en_US" ) ) . "' allowfullscreen='true' style='border:0;'></iframe>";
300 } else {
301 $html = "<iframe class='youtube-player' type='text/html' width='$w' height='$h' src='" . esc_url( set_url_scheme( "http://www.youtube.com/embed/$id?version=3&rel=$rel&fs=1$fmt$autohide&showsearch=$search&showinfo=$info&iv_load_policy=$iv$start$end$hd&wmode=$wmode$theme$autoplay{$cc}{$cc_lang}" ) ) . "' allowfullscreen='true' style='border:0;'></iframe>";
302 }
303
304 // Let's do some alignment wonder in a span, unless we're producing a feed
305 if ( ! is_feed() ) {
306 $alignmentcss = 'text-align:center;';
307 if ( isset( $qargs['align'] ) ) {
308 switch ( $qargs['align'] ) {
309 case 'left':
310 $alignmentcss = "float:left; width:{$w}px; height:{$h}px; margin-right:10px; margin-bottom: 10px;";
311 break;
312 case 'right':
313 $alignmentcss = "float:right; width:{$w}px; height:{$h}px; margin-left:10px; margin-bottom: 10px;";
314 break;
315 }
316 }
317
318 $html = sprintf(
319 '<span class="embed-youtube" style="%s display: block;">%s</span>',
320 esc_attr( $alignmentcss ),
321 $html
322 );
323
324 }
325
326 /**
327 * Filter the YouTube video HTML output.
328 *
329 * @module shortcodes
330 *
331 * @since 1.2.3
332 *
333 * @param string $html YouTube video HTML output.
334 */
335 $html = apply_filters( 'video_embed_html', $html );
336
337 return $html;
338 }
339
340 function youtube_shortcode( $atts ) {
341 return youtube_id( ( isset ( $atts[0] ) ) ? ltrim( $atts[0] , '=' ) : shortcode_new_to_old_params( $atts ) );
342 }
343
344 add_shortcode( 'youtube', 'youtube_shortcode' );
345
346 /**
347 * For bare URLs on their own line of the form
348 * http://www.youtube.com/v/9FhMMmqzbD8?fs=1&hl=en_US
349 */
350 function wpcom_youtube_embed_crazy_url( $matches, $attr, $url ) {
351 return youtube_id( $url );
352 }
353
354 function wpcom_youtube_embed_crazy_url_init() {
355 wp_embed_register_handler( 'wpcom_youtube_embed_crazy_url', '#https?://(?:www\.)?(?:youtube.com/(?:v/|playlist|watch[/\#?])|youtu\.be/).*#i', 'wpcom_youtube_embed_crazy_url' );
356 }
357
358 add_action( 'init', 'wpcom_youtube_embed_crazy_url_init' );
359
360 /**
361 * Allow oEmbeds in Jetpack's Comment form.
362 *
363 * @module shortcodes
364 *
365 * @since 2.8.0
366 *
367 * @param int get_option('embed_autourls') Option to automatically embed all plain text URLs.
368 */
369 if ( ! is_admin() && apply_filters( 'jetpack_comments_allow_oembed', true ) ) {
370 // We attach wp_kses_post to comment_text in default-filters.php with priority of 10 anyway, so the iframe gets filtered out.
371 // Higher priority because we need it before auto-link and autop get to it
372 add_filter( 'comment_text', 'youtube_link', 1 );
373 }
374
375 /**
376 * Core changes to do_shortcode (https://core.trac.wordpress.org/changeset/34747) broke "improper" shortcodes
377 * with the format [shortcode=http://url.com].
378 *
379 * This removes the "=" from the shortcode so it can be parsed.
380 *
381 * @see https://github.com/Automattic/jetpack/issues/3121
382 */
383 function jetpack_fix_youtube_shortcode_display_filter( $content ) {
384 if ( strpos( $content, '[youtube=' ) !== false ) {
385 $content = preg_replace( '@\[youtube=(.*?)\]@', '[youtube $1]', $content );
386 }
387
388 return $content;
389 }
390 add_filter( 'the_content', 'jetpack_fix_youtube_shortcode_display_filter', 7 );
391