WP_Embed::delete_oembed_caches() - Code Metrics - ntwb/wordpress - Measure and Improve Code Quality continuously with Scrutinizer

WP_Embed::delete_oembed_caches() A
last analyzed 2017-06-24 04:06 UTC

↳ Parent: WP_Embed

Complexity

Conditions	4
Paths	4

Size

Total Lines	10
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	4
eloc	7
nc	4
nop	1
dl	0
loc	10
rs	9.2
c	0
b	0
f	0

<?php
/**
 * API for easily embedding rich media such as videos and images into content.
 *
 * @package WordPress
 * @subpackage Embed
 * @since 2.9.0
 */
class WP_Embed {
	public $handlers = array();
	public $post_ID;
	public $usecache = true;
	public $linkifunknown = true;
	public $last_attr = array();
	public $last_url = '';

	/**
	 * When a URL cannot be embedded, return false instead of returning a link
	 * or the URL.
	 *
	 * Bypasses the {@see 'embed_maybe_make_link'} filter.
	 *
	 * @access public
	 * @var bool
	 */
	public $return_false_on_fail = false;

	/**
	 * Constructor
	 */
	public function __construct() {
		// Hack to get the [embed] shortcode to run before wpautop()
		add_filter( 'the_content', array( $this, 'run_shortcode' ), 8 );

		// Shortcode placeholder for strip_shortcodes()
		add_shortcode( 'embed', '__return_false' );

		// Attempts to embed all URLs in a post
		add_filter( 'the_content', array( $this, 'autoembed' ), 8 );

		// After a post is saved, cache oEmbed items via Ajax
		add_action( 'edit_form_advanced', array( $this, 'maybe_run_ajax_cache' ) );
		add_action( 'edit_page_form', array( $this, 'maybe_run_ajax_cache' ) );
	}

	/**
	 * Process the [embed] shortcode.
	 *
	 * Since the [embed] shortcode needs to be run earlier than other shortcodes,
	 * this function removes all existing shortcodes, registers the [embed] shortcode,
	 * calls do_shortcode(), and then re-registers the old shortcodes.
	 *
	 * @global array $shortcode_tags
	 *
	 * @param string $content Content to parse
	 * @return string Content with shortcode parsed
	 */
	public function run_shortcode( $content ) {
		global $shortcode_tags;

		// Back up current registered shortcodes and clear them all out
		$orig_shortcode_tags = $shortcode_tags;
		remove_all_shortcodes();

		add_shortcode( 'embed', array( $this, 'shortcode' ) );

		// Do the shortcode (only the [embed] one is registered)
		$content = do_shortcode( $content, true );

		// Put the original shortcodes back
		$shortcode_tags = $orig_shortcode_tags;

		return $content;
	}

	/**
	 * If a post/page was saved, then output JavaScript to make
	 * an Ajax request that will call WP_Embed::cache_oembed().
	 */
	public function maybe_run_ajax_cache() {
		$post = get_post();

		if ( ! $post || empty( $_GET['message'] ) )
			return;

?>
<script type="text/javascript">
	jQuery(document).ready(function($){
		$.get("<?php echo admin_url( 'admin-ajax.php?action=oembed-cache&post=' . $post->ID, 'relative' ); ?>");
	});
</script>
<?php
	}

	/**
	 * Registers an embed handler.
	 *
	 * Do not use this function directly, use wp_embed_register_handler() instead.
	 *
	 * This function should probably also only be used for sites that do not support oEmbed.
	 *
	 * @param string $id An internal ID/name for the handler. Needs to be unique.
	 * @param string $regex The regex that will be used to see if this handler should be used for a URL.
	 * @param callable $callback The callback function that will be called if the regex is matched.
	 * @param int $priority Optional. Used to specify the order in which the registered handlers will be tested (default: 10). Lower numbers correspond with earlier testing, and handlers with the same priority are tested in the order in which they were added to the action.
	 */
	public function register_handler( $id, $regex, $callback, $priority = 10 ) {
		$this->handlers[$priority][$id] = array(
			'regex'    => $regex,
			'callback' => $callback,
		);
	}

	/**
	 * Unregisters a previously-registered embed handler.
	 *
	 * Do not use this function directly, use wp_embed_unregister_handler() instead.
	 *
	 * @param string $id The handler ID that should be removed.
	 * @param int $priority Optional. The priority of the handler to be removed (default: 10).
	 */
	public function unregister_handler( $id, $priority = 10 ) {
		unset( $this->handlers[ $priority ][ $id ] );
	}

	/**
	 * The do_shortcode() callback function.
	 *
	 * Attempts to convert a URL into embed HTML. Starts by checking the URL against the regex of
	 * the registered embed handlers. If none of the regex matches and it's enabled, then the URL
	 * will be given to the WP_oEmbed class.
	 *
	 * @param array $attr {
	 *     Shortcode attributes. Optional.
	 *
	 *     @type int $width  Width of the embed in pixels.
	 *     @type int $height Height of the embed in pixels.
	 * }
	 * @param string $url The URL attempting to be embedded.
	 * @return string|false The embed HTML on success, otherwise the original URL.
	 *                      `->maybe_make_link()` can return false on failure.
	 */
	public function shortcode( $attr, $url = '' ) {
		$post = get_post();

		if ( empty( $url ) && ! empty( $attr['src'] ) ) {
			$url = $attr['src'];
		}

		$this->last_url = $url;

		if ( empty( $url ) ) {
			$this->last_attr = $attr;
			return '';
		}

		$rawattr = $attr;
		$attr = wp_parse_args( $attr, wp_embed_defaults( $url ) );

		$this->last_attr = $attr;

		// kses converts & into &amp; and we need to undo this
		// See https://core.trac.wordpress.org/ticket/11311
		$url = str_replace( '&amp;', '&', $url );

		// Look for known internal handlers
		ksort( $this->handlers );
		foreach ( $this->handlers as $priority => $handlers ) {
			foreach ( $handlers as $id => $handler ) {
				if ( preg_match( $handler['regex'], $url, $matches ) && is_callable( $handler['callback'] ) ) {
					if ( false !== $return = call_user_func( $handler['callback'], $matches, $attr, $url, $rawattr ) )
						/**
						 * Filters the returned embed handler.
						 *
						 * @since 2.9.0
						 *
						 * @see WP_Embed::shortcode()
						 *
						 * @param mixed  $return The shortcode callback function to call.
						 * @param string $url    The attempted embed URL.
						 * @param array  $attr   An array of shortcode attributes.
						 */
						return apply_filters( 'embed_handler_html', $return, $url, $attr );
				}
			}
		}

		$post_ID = ( ! empty( $post->ID ) ) ? $post->ID : null;
		if ( ! empty( $this->post_ID ) ) // Potentially set by WP_Embed::cache_oembed()
			$post_ID = $this->post_ID;

		// Unknown URL format. Let oEmbed have a go.
		if ( $post_ID ) {

			// Check for a cached result (stored in the post meta)
			$key_suffix = md5( $url . serialize( $attr ) );
			$cachekey = '_oembed_' . $key_suffix;
			$cachekey_time = '_oembed_time_' . $key_suffix;

			/**
			 * Filters the oEmbed TTL value (time to live).
			 *
			 * @since 4.0.0
			 *
			 * @param int    $time    Time to live (in seconds).
			 * @param string $url     The attempted embed URL.
			 * @param array  $attr    An array of shortcode attributes.
			 * @param int    $post_ID Post ID.
			 */
			$ttl = apply_filters( 'oembed_ttl', DAY_IN_SECONDS, $url, $attr, $post_ID );

			$cache = get_post_meta( $post_ID, $cachekey, true );
			$cache_time = get_post_meta( $post_ID, $cachekey_time, true );

			if ( ! $cache_time ) {
				$cache_time = 0;
			}

			$cached_recently = ( time() - $cache_time ) < $ttl;

			if ( $this->usecache || $cached_recently ) {
				// Failures are cached. Serve one if we're using the cache.
				if ( '{{unknown}}' === $cache )
					return $this->maybe_make_link( $url );

				if ( ! empty( $cache ) ) {
					/**
					 * Filters the cached oEmbed HTML.
					 *
					 * @since 2.9.0
					 *
					 * @see WP_Embed::shortcode()
					 *
					 * @param mixed  $cache   The cached HTML result, stored in post meta.
					 * @param string $url     The attempted embed URL.
					 * @param array  $attr    An array of shortcode attributes.
					 * @param int    $post_ID Post ID.
					 */
					return apply_filters( 'embed_oembed_html', $cache, $url, $attr, $post_ID );
				}
			}

			/**
			 * Filters whether to inspect the given URL for discoverable link tags.
			 *
			 * @since 2.9.0
			 * @since 4.4.0 The default value changed to true.
			 *
			 * @see WP_oEmbed::discover()
			 *
			 * @param bool $enable Whether to enable `<link>` tag discovery. Default true.
			 */
			$attr['discover'] = ( apply_filters( 'embed_oembed_discover', true ) );

			// Use oEmbed to get the HTML
			$html = wp_oembed_get( $url, $attr );

			// Maybe cache the result
			if ( $html ) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
				update_post_meta( $post_ID, $cachekey, $html );
				update_post_meta( $post_ID, $cachekey_time, time() );
			} elseif ( ! $cache ) {
				update_post_meta( $post_ID, $cachekey, '{{unknown}}' );
			}

			// If there was a result, return it
			if ( $html ) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
				/** This filter is documented in wp-includes/class-wp-embed.php */
				return apply_filters( 'embed_oembed_html', $html, $url, $attr, $post_ID );
			}
		}

		// Still unknown
		return $this->maybe_make_link( $url );
	}

	/**
	 * Delete all oEmbed caches. Unused by core as of 4.0.0.
	 *
	 * @param int $post_ID Post ID to delete the caches for.
	 */
	public function delete_oembed_caches( $post_ID ) {
		$post_metas = get_post_custom_keys( $post_ID );
		if ( empty($post_metas) )
			return;

		foreach ( $post_metas as $post_meta_key ) {
			if ( '_oembed_' == substr( $post_meta_key, 0, 8 ) )
				delete_post_meta( $post_ID, $post_meta_key );
		}
	}

	/**
	 * Triggers a caching of all oEmbed results.
	 *
	 * @param int $post_ID Post ID to do the caching for.
	 */
	public function cache_oembed( $post_ID ) {
		$post = get_post( $post_ID );

		$post_types = get_post_types( array( 'show_ui' => true ) );
		/**
		 * Filters the array of post types to cache oEmbed results for.
		 *
		 * @since 2.9.0
		 *
		 * @param array $post_types Array of post types to cache oEmbed results for. Defaults to post types with `show_ui` set to true.
		 */
		if ( empty( $post->ID ) || ! in_array( $post->post_type, apply_filters( 'embed_cache_oembed_types', $post_types ) ) ){
			return;
		}

		// Trigger a caching
		if ( ! empty( $post->post_content ) ) {
			$this->post_ID = $post->ID;
			$this->usecache = false;

			$content = $this->run_shortcode( $post->post_content );
			$this->autoembed( $content );

			$this->usecache = true;
		}
	}

	/**
	 * Passes any unlinked URLs that are on their own line to WP_Embed::shortcode() for potential embedding.
	 *
	 * @see WP_Embed::autoembed_callback()
	 *
	 * @param string $content The content to be searched.
	 * @return string Potentially modified $content.
	 */
	public function autoembed( $content ) {
		// Replace line breaks from all HTML elements with placeholders.
		$content = wp_replace_in_html_tags( $content, array( "\n" => '<!-- wp-line-break -->' ) );

		if ( preg_match( '#(^|\s|>)https?://#i', $content ) ) {
			// Find URLs on their own line.
			$content = preg_replace_callback( '|^(\s*)(https?://[^\s<>"]+)(\s*)$|im', array( $this, 'autoembed_callback' ), $content );
			// Find URLs in their own paragraph.
			$content = preg_replace_callback( '|(<p(?: [^>]*)?>\s*)(https?://[^\s<>"]+)(\s*<\/p>)|i', array( $this, 'autoembed_callback' ), $content );
		}

		// Put the line breaks back.
		return str_replace( '<!-- wp-line-break -->', "\n", $content );
	}

	/**
	 * Callback function for WP_Embed::autoembed().
	 *
	 * @param array $match A regex match array.
	 * @return string The embed HTML on success, otherwise the original URL.
	 */
	public function autoembed_callback( $match ) {
		$oldval = $this->linkifunknown;
		$this->linkifunknown = false;
		$return = $this->shortcode( array(), $match[2] );
		$this->linkifunknown = $oldval;

		return $match[1] . $return . $match[3];
	}

	/**
	 * Conditionally makes a hyperlink based on an internal class variable.
	 *
	 * @param string $url URL to potentially be linked.
	 * @return false|string Linked URL or the original URL. False if 'return_false_on_fail' is true.
	 */
	public function maybe_make_link( $url ) {
		if ( $this->return_false_on_fail ) {
			return false;
		}

		$output = ( $this->linkifunknown ) ? '<a href="' . esc_url($url) . '">' . esc_html($url) . '</a>' : $url;

		/**
		 * Filters the returned, maybe-linked embed URL.
		 *
		 * @since 2.9.0
		 *
		 * @param string $output The linked or original URL.
		 * @param string $url    The original URL.
		 */
		return apply_filters( 'embed_maybe_make_link', $output, $url );
	}
}


1			<?php
2			/**
3			* API for easily embedding rich media such as videos and images into content.
4			*
5			* @package WordPress
6			* @subpackage Embed
7			* @since 2.9.0
8			*/
9			class WP_Embed {
10			public $handlers = array();
11			public $post_ID;
12			public $usecache = true;
13			public $linkifunknown = true;
14			public $last_attr = array();
15			public $last_url = '';
16
17			/**
18			* When a URL cannot be embedded, return false instead of returning a link
19			* or the URL.
20			*
21			* Bypasses the {@see 'embed_maybe_make_link'} filter.
22			*
23			* @access public
24			* @var bool
25			*/
26			public $return_false_on_fail = false;
27
28			/**
29			* Constructor
30			*/
31			public function __construct() {
32			// Hack to get the [embed] shortcode to run before wpautop()
33			add_filter( 'the_content', array( $this, 'run_shortcode' ), 8 );
34
35			// Shortcode placeholder for strip_shortcodes()
36			add_shortcode( 'embed', '__return_false' );
37
38			// Attempts to embed all URLs in a post
39			add_filter( 'the_content', array( $this, 'autoembed' ), 8 );
40
41			// After a post is saved, cache oEmbed items via Ajax
42			add_action( 'edit_form_advanced', array( $this, 'maybe_run_ajax_cache' ) );
43			add_action( 'edit_page_form', array( $this, 'maybe_run_ajax_cache' ) );
44			}
45
46			/**
47			* Process the [embed] shortcode.
48			*
49			* Since the [embed] shortcode needs to be run earlier than other shortcodes,
50			* this function removes all existing shortcodes, registers the [embed] shortcode,
51			* calls do_shortcode(), and then re-registers the old shortcodes.
52			*
53			* @global array $shortcode_tags
54			*
55			* @param string $content Content to parse
56			* @return string Content with shortcode parsed
57			*/
58			public function run_shortcode( $content ) {
59			global $shortcode_tags;
60
61			// Back up current registered shortcodes and clear them all out
62			$orig_shortcode_tags = $shortcode_tags;
63			remove_all_shortcodes();
64
65			add_shortcode( 'embed', array( $this, 'shortcode' ) );
66
67			// Do the shortcode (only the [embed] one is registered)
68			$content = do_shortcode( $content, true );
69
70			// Put the original shortcodes back
71			$shortcode_tags = $orig_shortcode_tags;
72
73			return $content;
74			}
75
76			/**
77			* If a post/page was saved, then output JavaScript to make
78			* an Ajax request that will call WP_Embed::cache_oembed().
79			*/
80			public function maybe_run_ajax_cache() {
81			$post = get_post();
82
83			if ( ! $post \|\| empty( $_GET['message'] ) )
84			return;
85
86			?>
87			<script type="text/javascript">
88			jQuery(document).ready(function($){
89			$.get("<?php echo admin_url( 'admin-ajax.php?action=oembed-cache&post=' . $post->ID, 'relative' ); ?>");
90			});
91			</script>
92			<?php
93			}
94
95			/**
96			* Registers an embed handler.
97			*
98			* Do not use this function directly, use wp_embed_register_handler() instead.
99			*
100			* This function should probably also only be used for sites that do not support oEmbed.
101			*
102			* @param string $id An internal ID/name for the handler. Needs to be unique.
103			* @param string $regex The regex that will be used to see if this handler should be used for a URL.
104			* @param callable $callback The callback function that will be called if the regex is matched.
105			* @param int $priority Optional. Used to specify the order in which the registered handlers will be tested (default: 10). Lower numbers correspond with earlier testing, and handlers with the same priority are tested in the order in which they were added to the action.
106			*/
107			public function register_handler( $id, $regex, $callback, $priority = 10 ) {
108			$this->handlers[$priority][$id] = array(
109			'regex' => $regex,
110			'callback' => $callback,
111			);
112			}
113
114			/**
115			* Unregisters a previously-registered embed handler.
116			*
117			* Do not use this function directly, use wp_embed_unregister_handler() instead.
118			*
119			* @param string $id The handler ID that should be removed.
120			* @param int $priority Optional. The priority of the handler to be removed (default: 10).
121			*/
122			public function unregister_handler( $id, $priority = 10 ) {
123			unset( $this->handlers[ $priority ][ $id ] );
124			}
125
126			/**
127			* The do_shortcode() callback function.
128			*
129			* Attempts to convert a URL into embed HTML. Starts by checking the URL against the regex of
130			* the registered embed handlers. If none of the regex matches and it's enabled, then the URL
131			* will be given to the WP_oEmbed class.
132			*
133			* @param array $attr {
134			* Shortcode attributes. Optional.
135			*
136			* @type int $width Width of the embed in pixels.
137			* @type int $height Height of the embed in pixels.
138			* }
139			* @param string $url The URL attempting to be embedded.
140			* @return string\|false The embed HTML on success, otherwise the original URL.
141			* `->maybe_make_link()` can return false on failure.
142			*/
143			public function shortcode( $attr, $url = '' ) {
144			$post = get_post();
145
146			if ( empty( $url ) && ! empty( $attr['src'] ) ) {
147			$url = $attr['src'];
148			}
149
150			$this->last_url = $url;
151
152			if ( empty( $url ) ) {
153			$this->last_attr = $attr;
154			return '';
155			}
156
157			$rawattr = $attr;
158			$attr = wp_parse_args( $attr, wp_embed_defaults( $url ) );
159
160			$this->last_attr = $attr;
161
162			// kses converts & into & and we need to undo this
163			// See https://core.trac.wordpress.org/ticket/11311
164			$url = str_replace( '&', '&', $url );
165
166			// Look for known internal handlers
167			ksort( $this->handlers );
168			foreach ( $this->handlers as $priority => $handlers ) {
169			foreach ( $handlers as $id => $handler ) {
170			if ( preg_match( $handler['regex'], $url, $matches ) && is_callable( $handler['callback'] ) ) {
171			if ( false !== $return = call_user_func( $handler['callback'], $matches, $attr, $url, $rawattr ) )
172			/**
173			* Filters the returned embed handler.
174			*
175			* @since 2.9.0
176			*
177			* @see WP_Embed::shortcode()
178			*
179			* @param mixed $return The shortcode callback function to call.
180			* @param string $url The attempted embed URL.
181			* @param array $attr An array of shortcode attributes.
182			*/
183			return apply_filters( 'embed_handler_html', $return, $url, $attr );
184			}
185			}
186			}
187
188			$post_ID = ( ! empty( $post->ID ) ) ? $post->ID : null;
189			if ( ! empty( $this->post_ID ) ) // Potentially set by WP_Embed::cache_oembed()
190			$post_ID = $this->post_ID;
191
192			// Unknown URL format. Let oEmbed have a go.
193			if ( $post_ID ) {
194
195			// Check for a cached result (stored in the post meta)
196			$key_suffix = md5( $url . serialize( $attr ) );
197			$cachekey = '_oembed_' . $key_suffix;
198			$cachekey_time = '_oembed_time_' . $key_suffix;
199
200			/**
201			* Filters the oEmbed TTL value (time to live).
202			*
203			* @since 4.0.0
204			*
205			* @param int $time Time to live (in seconds).
206			* @param string $url The attempted embed URL.
207			* @param array $attr An array of shortcode attributes.
208			* @param int $post_ID Post ID.
209			*/
210			$ttl = apply_filters( 'oembed_ttl', DAY_IN_SECONDS, $url, $attr, $post_ID );
211
212			$cache = get_post_meta( $post_ID, $cachekey, true );
213			$cache_time = get_post_meta( $post_ID, $cachekey_time, true );
214
215			if ( ! $cache_time ) {
216			$cache_time = 0;
217			}
218
219			$cached_recently = ( time() - $cache_time ) < $ttl;
220
221			if ( $this->usecache \|\| $cached_recently ) {
222			// Failures are cached. Serve one if we're using the cache.
223			if ( '{{unknown}}' === $cache )
224			return $this->maybe_make_link( $url );
225
226			if ( ! empty( $cache ) ) {
227			/**
228			* Filters the cached oEmbed HTML.
229			*
230			* @since 2.9.0
231			*
232			* @see WP_Embed::shortcode()
233			*
234			* @param mixed $cache The cached HTML result, stored in post meta.
235			* @param string $url The attempted embed URL.
236			* @param array $attr An array of shortcode attributes.
237			* @param int $post_ID Post ID.
238			*/
239			return apply_filters( 'embed_oembed_html', $cache, $url, $attr, $post_ID );
240			}
241			}
242
243			/**
244			* Filters whether to inspect the given URL for discoverable link tags.
245			*
246			* @since 2.9.0
247			* @since 4.4.0 The default value changed to true.
248			*
249			* @see WP_oEmbed::discover()
250			*
251			* @param bool $enable Whether to enable `<link>` tag discovery. Default true.
252			*/
253			$attr['discover'] = ( apply_filters( 'embed_oembed_discover', true ) );
254
255			// Use oEmbed to get the HTML
256			$html = wp_oembed_get( $url, $attr );
257
258			// Maybe cache the result
259			if ( $html ) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-17 04:17 UTC by Report Bug Copy Issue Report The expression `$html` of type `false\|string` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== false` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
260			update_post_meta( $post_ID, $cachekey, $html );
261			update_post_meta( $post_ID, $cachekey_time, time() );
262			} elseif ( ! $cache ) {
263			update_post_meta( $post_ID, $cachekey, '{{unknown}}' );
264			}
265
266			// If there was a result, return it
267			if ( $html ) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-17 04:17 UTC by Report Bug Copy Issue Report The expression `$html` of type `false\|string` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== false` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
268			/** This filter is documented in wp-includes/class-wp-embed.php */
269			return apply_filters( 'embed_oembed_html', $html, $url, $attr, $post_ID );
270			}
271			}
272
273			// Still unknown
274			return $this->maybe_make_link( $url );
275			}
276
277			/**
278			* Delete all oEmbed caches. Unused by core as of 4.0.0.
279			*
280			* @param int $post_ID Post ID to delete the caches for.
281			*/
282			public function delete_oembed_caches( $post_ID ) {
283			$post_metas = get_post_custom_keys( $post_ID );
284			if ( empty($post_metas) )
285			return;
286
287			foreach ( $post_metas as $post_meta_key ) {
288			if ( '_oembed_' == substr( $post_meta_key, 0, 8 ) )
289			delete_post_meta( $post_ID, $post_meta_key );
290			}
291			}
292
293			/**
294			* Triggers a caching of all oEmbed results.
295			*
296			* @param int $post_ID Post ID to do the caching for.
297			*/
298			public function cache_oembed( $post_ID ) {
299			$post = get_post( $post_ID );
300
301			$post_types = get_post_types( array( 'show_ui' => true ) );
302			/**
303			* Filters the array of post types to cache oEmbed results for.
304			*
305			* @since 2.9.0
306			*
307			* @param array $post_types Array of post types to cache oEmbed results for. Defaults to post types with `show_ui` set to true.
308			*/
309			if ( empty( $post->ID ) \|\| ! in_array( $post->post_type, apply_filters( 'embed_cache_oembed_types', $post_types ) ) ){
310			return;
311			}
312
313			// Trigger a caching
314			if ( ! empty( $post->post_content ) ) {
315			$this->post_ID = $post->ID;
316			$this->usecache = false;
317
318			$content = $this->run_shortcode( $post->post_content );
319			$this->autoembed( $content );
320
321			$this->usecache = true;
322			}
323			}
324
325			/**
326			* Passes any unlinked URLs that are on their own line to WP_Embed::shortcode() for potential embedding.
327			*
328			* @see WP_Embed::autoembed_callback()
329			*
330			* @param string $content The content to be searched.
331			* @return string Potentially modified $content.
332			*/
333			public function autoembed( $content ) {
334			// Replace line breaks from all HTML elements with placeholders.
335			$content = wp_replace_in_html_tags( $content, array( "\n" => '<!-- wp-line-break -->' ) );
336
337			if ( preg_match( '#(^\|\s\|>)https?://#i', $content ) ) {
338			// Find URLs on their own line.
339			$content = preg_replace_callback( '\|^(\s)(https?://[^\s<>"]+)(\s)$\|im', array( $this, 'autoembed_callback' ), $content );
340			// Find URLs in their own paragraph.
341			$content = preg_replace_callback( '\|(<p(?: [^>])?>\s)(https?://[^\s<>"]+)(\s*<\/p>)\|i', array( $this, 'autoembed_callback' ), $content );
342			}
343
344			// Put the line breaks back.
345			return str_replace( '<!-- wp-line-break -->', "\n", $content );
346			}
347
348			/**
349			* Callback function for WP_Embed::autoembed().
350			*
351			* @param array $match A regex match array.
352			* @return string The embed HTML on success, otherwise the original URL.
353			*/
354			public function autoembed_callback( $match ) {
355			$oldval = $this->linkifunknown;
356			$this->linkifunknown = false;
357			$return = $this->shortcode( array(), $match[2] );
358			$this->linkifunknown = $oldval;
359
360			return $match[1] . $return . $match[3];
361			}
362
363			/**
364			* Conditionally makes a hyperlink based on an internal class variable.
365			*
366			* @param string $url URL to potentially be linked.
367			* @return false\|string Linked URL or the original URL. False if 'return_false_on_fail' is true.
368			*/
369			public function maybe_make_link( $url ) {
370			if ( $this->return_false_on_fail ) {
371			return false;
372			}
373
374			$output = ( $this->linkifunknown ) ? '<a href="' . esc_url($url) . '">' . esc_html($url) . '</a>' : $url;
375
376			/**
377			* Filters the returned, maybe-linked embed URL.
378			*
379			* @since 2.9.0
380			*
381			* @param string $output The linked or original URL.
382			* @param string $url The original URL.
383			*/
384			return apply_filters( 'embed_maybe_make_link', $output, $url );
385			}
386			}
387

ntwb / wordpress

WP_Embed::delete_oembed_caches() A last analyzed 2017-06-24 04:06 UTC

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WP_Embed::delete_oembed_caches() A
last analyzed 2017-06-24 04:06 UTC