....................................../////.===Shadow-Here===./////................................................ > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < ------------------------------------------------------------------------------------------------------------------- /////////////////////////////////////////////////////////////////////////////////////////////////////////////////// RIFF¤ WEBPVP8 ˜ ðÑ *ôô>‘HŸK¥¤"§£±¨àð enü¹%½_F‘åè¿2ºQú³íªú`N¿­3ÿƒügµJžaÿ¯ÿ°~¼ÎùnúîÞÖô•òíôÁÉß®Sm¥Ü/ ‡ó˜f£Ùà<˜„xëJ¢Ù€SO3x<ªÔ©4¿+ç¶A`q@Ì“Úñè™ÍÿJÌ´ª-˜ÆtÊÛL]Ïq*‘Ý”ì#ŸÌÏãY]@ê`¿ /ªfkØB4·®£ó z—Üw¥Pxù–ÞLШKÇN¾AkÙTf½è'‰g gÆv›Øuh~ a˜Z— ïj*á¥t d£“uÒ ¨`K˜¹ßþ]b>˜]_ÏÔ6W—è2r4x•íÖ…"ƒÖNîä!¦å Ú}ýxGøÌ —@ ;ÆÚŠ=ɾ1ý8lªË¥ô ^yf®Œ¢u&2©nÙÇ›ñÂñŒ³ aPo['½»øFùà­+4ê“$!lövlüÞ=;N®3ð‚õ›DÉKòÞ>ÄÍ ¥ˆuߤ#ˆ$6ù™¥îŠ‡y’ÍB¼ çxÛ;X"WL£R÷͝*ó-¶Zu}º.s¸sšXqù–DþÿvªhüïwyŸ ¯é³lÀ:KCûÄ£Ëá\…­ ~—ýóî ¼ûûÜTÓüÇy…ŽÆvc»¾×U ñ¸žþоP÷¦ó:Ò¨¨5;Ð#&#ÖúñläÿÁœ GxÉ­/ñ‡áQðìYÉtÒwŽ¼GÔ´zàÒò ð*ëzƒ•4~H]Ø‹f ñÓÈñ`NåWçs'ÆÏW^ø¹!XžµmQ5ÃËoLœÎ: ÞËÍ¥J ù…î èo£ßPÎñ¶ž8.Œ]ʵ~5›ÙË-ù*8ÙÖß±~ ©¹rÓê‚j¶d¸{^Q'˜±Crß ÚH—#¥¥QlÀ×ëã‡DÜ«èî þ&Çæžî;ŽÏºò6ÒLÃXy&ZŒ'j‚¢Ù€IßÚù+–MGi‰*jE€‘JcÜ ÓÌ EÏÚj]o˜ Þr <¾U ûŪæÍ/šÝH¥˜b”¼ ÁñßX GP›ï2›4WŠÏà×£…íÓk†¦H·ÅíMh–*nó÷à]ÁjCº€b7<ب‹¨5車bp2:Á[UªM„QŒçiNMa#<5›áËó¸HýÊ"…×Éw¹¦ì2º–x<›»a±¸3Weü®FÝ⑱ö–î–³|LPÈ~çð~Çå‡|º kD¢µÏàÆAI %1À% ¹Ò – ”ϝS¦‰4&¶£°à Öý”û_Ò Áw°A«Å€?mÇÛgHÉ/8)á¾ÛìáöŽP í¨PŸNÙµº¦‡§Ùš"ÿ«>+ªÕ`Ê÷‡‚ß Õû˜þãÇ-PÍ.¾XV‘€ dÜ"þ4¹ ±Oú‘©t¥¦FªÄÃÄ•b‚znýu½—#cDs˜ÃiÑOˆñ×QO=*IAÊ,¶ŽZƒ;‡wøXè%EÐk:F±Ú” .Ѽ+Áu&Ç`."pÈÉw o&¿dE6‘’EqTuK@Ì¥ã™À(Êk(h‰,H}RÀIXÛš3µ1©_OqÚÒJAñ$ÊÙÜ;D3çŒ[þùœh¬Ã³™ö6ç†NY".Ú‰ï[ªŸŒ '²Ð öø_¨ÂÉ9u鶳ÒŠõTàîMØ#û¯gN‡bÙ놚X„ö …ÉeüÌ^J ‹€.œ$Æ)βÄeæW#óüßĺŸ€ ÀzwV 9oä»f4V*uB «Ë†¹ì¯žR霓æHXa=&“I4K;¯ç‹h×·"UŠ~<•â•ªVêª&ÍSÃÆÅ?ÔqÎ*mTM ˜›µwêd#[C¡©§‘D<©àb†–ÁœøvH/,í:¯( ²£|4-„Æövv„Yͼ™^Á$ˆ„¢Û[6yB.åH*V¨æ?$=˜Ñ€•î¦ñ·­(VlŸ‘ nÀt8W÷´Bûba?q9ú¶Xƒl«ÿ\ù¶’þòUÐj/õ¢Ìµ³g$ƒÎR!¸»|Oߍë’BhîÚÑ¢ñåŒJ„®„£2Ð3•ô02Nt…!£Í]Ïc½Qÿ?ˆ<&ÃA¾Ú,JˆijÌ#5yz„‰Î|ÊŽ5QÏ:‹ÐaóVÔxW—CpeÏzÐïíçôÿÅ_[hãsÐ_/ŽTÝ?BîˆííV$<¿i>²F¬_Eß¿ †bÊŒº­ÿ®Z H“C}”¬,Mp ý/Bá£w>˜YV°aƒúh+cŠ- r/[%|üUMHäQ°X»|û/@|°¥Ð !BÔ Ç¢Ä©š+Õì D«7ìN¶ŽðÔ " ƶ’ÖçtA‰Û×}{tþz­¾GÍ›k¹OEJR$ Â׃ «ëÁ"oÉôž$oUK(Ä)Ãz³Ê-‹êN[Ò3Œñbï8P 4ƒ×q¢bo|?<ÛX¬òÄÍ°L–±›(™ûG?ýË©ÚÄ–ÂDØÐ_Ç¡ô ¾–ÄÏø ×e8Ë©$ÄF¹Å‹ì[©óìl:F¾f´‹‹Xì²ï®\¬ôùƒ ÿat¥óèÒùHß0äe‚;ü×h:ÆWðHž=Ã8骣"kœ'Y?³}Tûè€>?0l›e1Lòñ„aæKÆw…hÖŠùW…ÈÆÄ0ši·›[pcwËþñiêíY/~-Á5˜!¿†A›™Mÿþ(±“t@â“ö2­´TG5yé]çå僳 .·ÍïçÝ7UÚ±Ð/Nè»,_Ï ùdj7\ï Wì4›„»c¸àešg#ÒÊ⥭áØo5‘?ÌdÝô¯ ¹kzsƒ=´#ëÉK›Ø´±-¥eW?‡çßtòTã…$Ý+qÿ±ƒ÷_3Ô¥í÷:æ–ž<·Ö‡‰Å¢ š‡%Ô—utÌÈìðžgÖÀz²À—ï÷Óîäõ{K'´È÷³yaÏÁjƒô}ž§®æÊydÕÈë5¯èˆõvÕ©ã*çD„ “z„Ó‡^^xÂ3M§A´JG‚öï 3W'ˆ.OvXè¡ÊÕª?5º7†˜(˜Ç¶#çê’¶!ÌdZK§æ 0fãaN]òY³RV ™î$®K2R¨`W!1Ôó\;Ý ýB%qæK•&ÓÈe9È0êI±žeŸß -ú@žQr¦ ö4»M¼Áè¹µmw 9 EÆE_°2ó„ŸXKWÁ×Hóì^´²GѝF©óäR†¦‰ç"V»eØ<3ùd3ÿÚ¤Žú“Gi" —‘_ÙËÎ~Üö¯¥½Î»üŸEÚŽåmÞþí ;ÞólËΦMzA"Âf(´òá;Éï(/7½ûñÌ­cïÕçлþÝz¾-ÍvÑ“pH­–ðÓj$¸Äû¤‚‘ãUBË-n“2åPkS5&‹Â|+g^œ®Ì͆d!OïäîU«c;{Û!ÅŽ«ëZ9Ókóˆ]¯ƒ›né `ÇÒ+tÆš (ØKá¾—=3œ®•vuMñg²\ï Ec€ 05±d™‡×iÇ×›UúvÌ¢£Èþ¡ÕØô¶ßÎA"ß±#Ö²ˆÊŸ¦*Ä~ij|àø.-¼'»Ú¥£h ofº¦‡VsR=N½„Î v˜Z*SÌ{=jÑB‹tê…;’HžH¯8–îDù8ñ¢|Q•bÛçš–‹m³“ê¨ åÏ^m¬Žãþ©ïêO‡½6] µÆ„Ooòü ²x}N¦Ë3ïé¿»€›HA˜m%çÞ/¿í7Fø“‹léUk)É°Œµ8Q8›:ÀŠeT*šõ~ôڝG6 ¢}`ùH­–”¡k ‰P1>š†®9z11!X wKfmÁ¦xÑ,N1Q”–æB¶M…ÒÃv6SMˆhU¬ÊPŽï‘öj=·CŒ¯u¹ƒVIЃsx4’ömÛýc塶7ßŠß 57^\wÒÐÆ k§h,Œý î«q^R½3]J¸ÇðN ‚çU¬ôº^Áì} ³f©Õœ§ˆã:FÄÈ‚é(€™?àýÓüè1Gô£¼éj‚OÅñ  #>×—ßtà 0G¥Åa뀐kßhc™À_ÉñÞ#±)GD" YîäË-ÿÙ̪ ¹™a¯´¢E\ÝÒö‚;™„ë]_ p8‰o¡ñ+^÷ 3‘'dT4œŽ ðVë½° :¬víÑ«£tßÚS-3¶“þ2 †üüʨòrš¹M{É_¤`Û¨0ìjœøJ‡:÷ÃáZ˜†@GP&œÑDGÏs¡þ¦þDGú‘1Yá9Ôþ¼ ûø…§÷8&–ÜÑnÄ_m®^üÆ`;ÉVÁJ£?â€-ßê}suÍ2sõA NÌúA磸‘îÿÚ»ƒìö·á¿±tÑÐ"Tÿü˜[@/äj¬€uüªìù¥Ý˜á8Ý´sõj 8@rˆð äþZÇD®ÿUÏ2ùôõrBzÆÏÞž>Ì™xœ“ wiÎ×7_… ¸ \#€MɁV¶¥üÕÿPÔ9Z‡ø§É8#H:ƒ5ÀÝå9ÍIŒ5åKÙŠ÷qÄ>1AÈøžj"µÂд/ªnÀ qªã}"iŸBå˜ÓÛŽ¦…&ݧ;G@—³b¯“•"´4í¨ôM¨åñC‹ïùÉó¯ÓsSH2Ý@ßáM‡ˆKÀªÛUeø/4\gnm¥‹ŸŒ qÄ b9ÞwÒNÏ_4Ég³ú=܆‚´ •â¥õeíþkjz>éÚyU«Íӝ݃6"8/ø{=Ô¢»G¥ äUw°W«,ô—¿ãㆅү¢³xŠUû™yŒ (øSópÐ 9\åTâ»—*oG$/×ÍT†Y¿1¤Þ¢_‡ ¼ „±ÍçèSaÓ 3ÛMÁBkxs‰’R/¡¤ˆÙçª(*õ„üXÌ´ƒ E§´¬EF"Ù”R/ÐNyÆÂ^°?™6¡œïJ·±$§?º>ÖüœcNÌù¯G ‹ñ2ŠBB„^·úìaz¨k:#¨Æ¨8LÎõލ£^§S&cŒÐU€ü(‡F±Š¼&P>8ÙÁ ‰ p5?0ÊƃZl¸aô š¼¡}gÿ¶zÆC²¹¬ÎÖG*HB¡O<º2#ñŒAƒ–¡B˜´É$¥›É:FÀÔx¾u?XÜÏÓvN©RS{2ʈãk9rmP¼Qq̳ è¼ÐFׄ^¡Öì fE“F4A…!ì/…¦Lƒ… … $%´¾yã@CI¬ á—3PþBÏNÿ<ý°4Ü ËÃ#ØÍ~âW«rEñw‹eùMMHß²`¬Öó½íf³:‹k˜¯÷}Z!ã¿<¥,\#öµÀ¯aÒNÆIé,Ћ–lŽ#Àæ9ÀÒS·I’½-Ïp Äz¤Š Â* ­íÄ9­< h>׍3ZkËU¹§˜ŒŠ±f­’¤º³Q ÏB?‹#µíÃ¥®@(Gs«†vI¥Mµ‹Á©e~2ú³ÁP4ìÕi‚²Ê^ö@-DþÓàlÜOÍ]n"µã:žpsŽ¢:! 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Current File : /home/u/n/e/uneseuleoc/crid/web/app/plugins/ewww-image-optimizer/classes/class-eio-page-parser.php
<?php
/**
 * Implements basic page parsing functions.
 *
 * @link https://ewww.io
 * @package EIO
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'EIO_Page_Parser' ) ) {
	/**
	 * HTML element and attribute parsing, replacing, etc.
	 */
	class EIO_Page_Parser extends EIO_Base {

		/**
		 * Allowed image extensions.
		 *
		 * @access protected
		 * @var array $extensions
		 */
		protected $extensions = array(
			'gif',
			'jpg',
			'jpeg',
			'jpe',
			'png',
		);

		/**
		 * Match all images and any relevant <a> tags in a block of HTML.
		 *
		 * The hyperlinks param implies that the src attribute is required, but not the other way around.
		 *
		 * @param string $content Some HTML.
		 * @param bool   $hyperlinks Default true. Should we include encasing hyperlinks in our search.
		 * @param bool   $src_required Default true. Should we look only for images with src attributes.
		 * @return array An array of $images matches, where $images[0] is
		 *         an array of full matches, and the link_url, img_tag,
		 *         and img_url keys are arrays of those matches.
		 */
		function get_images_from_html( $content, $hyperlinks = true, $src_required = true ) {
			$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
			$images          = array();
			$unquoted_images = array();

			$unquoted_pattern = '';
			$search_pattern   = '#(?P<img_tag><img\s[^>]*?>)#is';
			if ( $hyperlinks ) {
				$this->debug_message( 'using figure+hyperlink(a) patterns with src required' );
				$search_pattern   = '#(?:<figure[^>]*?\s+?class\s*=\s*["\'](?P<figure_class>[\w\s-]+?)["\'][^>]*?>\s*)?(?:<a[^>]*?\s+?href\s*=\s*["\'](?P<link_url>[^\s]+?)["\'][^>]*?>\s*)?(?P<img_tag><img[^>]*?\s+?src\s*=\s*("|\')(?P<img_url>(?!\4).+?)\4[^>]*?>){1}(?:\s*</a>)?#is';
				$unquoted_pattern = '#(?:<figure[^>]*?\s+?class\s*=\s*(?P<figure_class>[\w-]+)[^>]*?>\s*)?(?:<a[^>]*?\s+?href\s*=\s*(?P<link_url>[^"\'][^\s>]+)[^>]*?>\s*)?(?P<img_tag><img[^>]*?\s+?src\s*=\s*(?P<img_url>[^"\'][^\s>]+)[^>]*?>){1}(?:\s*</a>)?#is';
			} elseif ( $src_required ) {
				$this->debug_message( 'using plain img pattern, src still required' );
				$search_pattern   = '#(?P<img_tag><img[^>]*?\s+?src\s*=\s*("|\')(?P<img_url>(?!\2).+?)\2[^>]*?>)#is';
				$unquoted_pattern = '#(?P<img_tag><img[^>]*?\s+?src\s*=\s*(?P<img_url>[^"\'][^\s>]+)[^>]*?>)#is';
			}
			if ( preg_match_all( $search_pattern, $content, $images ) ) {
				$this->debug_message( 'found ' . count( $images[0] ) . ' image elements with quoted pattern' );
				foreach ( $images as $key => $unused ) {
					// Simplify the output as much as possible.
					if ( is_numeric( $key ) && $key > 0 ) {
						unset( $images[ $key ] );
					}
				}
				/* $this->debug_message( print_r( $images, true ) ); */
			}
			$images = array_filter( $images );
			if ( $unquoted_pattern && preg_match_all( $unquoted_pattern, $content, $unquoted_images ) ) {
				$this->debug_message( 'found ' . count( $unquoted_images[0] ) . ' image elements with unquoted pattern' );
				foreach ( $unquoted_images as $key => $unused ) {
					// Simplify the output as much as possible.
					if ( is_numeric( $key ) && $key > 0 ) {
						unset( $unquoted_images[ $key ] );
					}
				}
				/* $this->debug_message( print_r( $unquoted_images, true ) ); */
			}
			$unquoted_images = array_filter( $unquoted_images );
			if ( ! empty( $images ) && ! empty( $unquoted_images ) ) {
				$this->debug_message( 'both patterns found results, merging' );
				/* $this->debug_message( print_r( $images, true ) ); */
				$images = array_merge_recursive( $images, $unquoted_images );
				/* $this->debug_message( print_r( $images, true ) ); */
				if ( ! empty( $images[0] ) && ! empty( $images[1] ) ) {
					$images[0] = array_merge( $images[0], $images[1] );
					unset( $images[1] );
				}
			} elseif ( empty( $images ) && ! empty( $unquoted_images ) ) {
				$this->debug_message( 'unquoted results only, subbing in' );
				$images = $unquoted_images;
			}
			/* $this->debug_message( print_r( $images, true ) ); */
			return $images;
		}

		/**
		 * Match all images wrapped in <noscript> tags in a block of HTML.
		 *
		 * @param string $content Some HTML.
		 * @return array An array of $images matches, where $images[0] is
		 *         an array of full matches, and the noscript_tag, img_tag,
		 *         and img_url keys are arrays of those matches.
		 */
		function get_noscript_images_from_html( $content ) {
			$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
			$images = array();

			if ( preg_match_all( '#(?P<noscript_tag><noscript[^>]*?>\s*)(?P<img_tag><img[^>]*?\s+?src\s*=\s*["\'](?P<img_url>[^\s]+?)["\'][^>]*?>){1}(?:\s*</noscript>)?#is', $content, $images ) ) {
				foreach ( $images as $key => $unused ) {
					// Simplify the output as much as possible, mostly for confirming test results.
					if ( is_numeric( $key ) && $key > 0 ) {
						unset( $images[ $key ] );
					}
				}
				return $images;
			}
			return array();
		}

		/**
		 * Match all sources wrapped in <picture> tags in a block of HTML.
		 *
		 * @param string $content Some HTML.
		 * @return array An array of $pictures matches, containing full elements with ending tags.
		 */
		function get_picture_tags_from_html( $content ) {
			$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
			$pictures = array();
			if ( preg_match_all( '#(?:<picture[^>]*?>\s*)(?:<source[^>]*?>)+(?:.*?</picture>)?#is', $content, $pictures ) ) {
				return $pictures[0];
			}
			return array();
		}

		/**
		 * Match all elements by tag name in a block of HTML. Does not retrieve contents or closing tags.
		 *
		 * @param string $content Some HTML.
		 * @param string $tag_name The name of the elements to retrieve.
		 * @return array An array of $elements.
		 */
		function get_elements_from_html( $content, $tag_name ) {
			$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
			if ( ! ctype_alpha( $tag_name ) ) {
				return array();
			}
			if ( preg_match_all( '#<' . $tag_name . '\s[^>]+?>#is', $content, $elements ) ) {
				return $elements[0];
			}
			return array();
		}

		/**
		 * Try to determine height and width from strings WP appends to resized image filenames.
		 *
		 * @param string $src The image URL.
		 * @return array An array consisting of width and height.
		 */
		function get_dimensions_from_filename( $src ) {
			$this->debug_message( '<b>' . __METHOD__ . '()</b>' );
			$width_height_string = array();
			$this->debug_message( "looking for dimensions in $src" );
			if ( preg_match( '#-(\d+)x(\d+)(@2x)?\.(?:' . implode( '|', $this->extensions ) . '){1}(?:\?.+)?$#i', $src, $width_height_string ) ) {
				$width  = (int) $width_height_string[1];
				$height = (int) $width_height_string[2];

				if ( strpos( $src, '@2x' ) ) {
					$width  = 2 * $width;
					$height = 2 * $height;
				}
				if ( $width && $height ) {
					$this->debug_message( "found w$width h$height" );
					return array( $width, $height );
				}
			}
			return array( false, false );
		}

		/**
		 * Get the width from an image element.
		 *
		 * @param string $img The full image element.
		 * @return string The width found or an empty string.
		 */
		public function get_img_width( $img ) {
			$width = $this->get_attribute( $img, 'width' );
			// Then check for an inline max-width directive.
			$style = $this->get_attribute( $img, 'style' );
			if ( $style && preg_match( '#max-width:\s?(\d+)px#', $style, $max_width_string ) ) {
				if ( $max_width_string[1] && ( ! $width || $max_width_string[1] < $width ) ) {
					$width = $max_width_string[1];
				}
			} elseif ( $style && preg_match( '#width:\s?(\d+)px#', $style, $width_string ) ) {
				if ( $width_string[1] && ( ! $width || $width_string[1] < $width ) ) {
					$width = $width_string[1];
				}
			}
			return $width;
		}

		/**
		 * Get the height from an image element.
		 *
		 * @param string $img The full image element.
		 * @return string The height found or an empty string.
		 */
		public function get_img_height( $img ) {
			$height = $this->get_attribute( $img, 'height' );
			// Then check for an inline max-height directive.
			$style = $this->get_attribute( $img, 'style' );
			if ( $style && preg_match( '#max-height:\s?(\d+)px#', $style, $max_height_string ) ) {
				if ( $max_height_string[1] && ( ! $height || $max_height_string[1] < $height ) ) {
					$height = $max_height_string[1];
				}
			} elseif ( $style && preg_match( '#height:\s?(\d+)px#', $style, $height_string ) ) {
				if ( $height_string[1] && ( ! $height || $height_string[1] < $height ) ) {
					$height = $height_string[1];
				}
			}
			return $height;
		}

		/**
		 * Get an attribute from an HTML element.
		 *
		 * @param string $element The HTML element to parse.
		 * @param string $name The name of the attribute to search for.
		 * @return string The value of the attribute, or an empty string if not found.
		 */
		function get_attribute( $element, $name ) {
			// Don't forget, back references cannot be used in character classes.
			if ( preg_match( '#\s' . $name . '\s*=\s*("|\')((?!\1).+?)\1#is', $element, $attr_matches ) ) {
				if ( ! empty( $attr_matches[2] ) ) {
					return $attr_matches[2];
				}
			}
			// If there were not any matches with quotes, look for unquoted attributes, no spaces or quotes allowed.
			if ( preg_match( '#\s' . $name . '\s*=\s*([^"\'][^\s>]+)#is', $element, $attr_matches ) ) {
				if ( ! empty( $attr_matches[1] ) ) {
					return $attr_matches[1];
				}
			}
			return '';
		}

		/**
		 * Get a CSS background-image URL.
		 *
		 * @param string $attribute An element's style attribute. Do not pass a full HTML element.
		 * @return string The URL from the background/background-image property.
		 */
		function get_background_image_url( $attribute ) {
			if ( ( false !== strpos( $attribute, 'background:' ) || false !== strpos( $attribute, 'background-image:' ) ) && false !== strpos( $attribute, 'url(' ) ) {
				if ( preg_match( '#url\(([^)]+)\)#', $attribute, $prop_match ) ) {
					return trim( html_entity_decode( $prop_match[1], ENT_QUOTES | ENT_HTML401 ), "'\"\t\n\r " );
				}
			}
			return '';
		}

		/**
		 * Set an attribute on an HTML element.
		 *
		 * @param string $element The HTML element to modify. Passed by reference.
		 * @param string $name The name of the attribute to set.
		 * @param string $value The value of the attribute to set.
		 * @param bool   $replace Default false. True to replace, false to append.
		 */
		function set_attribute( &$element, $name, $value, $replace = false ) {
			if ( 'class' === $name ) {
				$element = preg_replace( "#\s$name\s+[^=]#", ' ', $element );
			}
			$element = preg_replace( "#\s$name=\"\"#", ' ', $element );
			$value   = trim( $value );
			if ( $replace ) {
				// Don't forget, back references cannot be used in character classes.
				$new_element = preg_replace( '#\s' . $name . '\s*=\s*("|\')(?!\1).*?\1#is', " $name=$1$value$1", $element );
				if ( strpos( $new_element, "$name=" ) ) {
					$element = $new_element;
					return;
				}
				$element = preg_replace( '#\s' . $name . '\s*=\s*[^"\'][^\s>]+#is', ' ', $element );
			}
			$closing = ' />';
			if ( false === strpos( $element, '/>' ) ) {
				$closing = '>';
			}
			if ( false === strpos( $value, '"' ) ) {
				$element = rtrim( $element, $closing ) . " $name=\"$value\"$closing";
				return;
			}
			$element = rtrim( $element, $closing ) . " $name='$value'$closing";
		}

		/**
		 * Remove an attribute from an HTML element.
		 *
		 * @param string $element The HTML element to modify. Passed by reference.
		 * @param string $name The name of the attribute to remove.
		 */
		function remove_attribute( &$element, $name ) {
			// Don't forget, back references cannot be used in character classes.
			$element = preg_replace( '#\s' . $name . '\s*=\s*("|\')(?!\1).+?\1#is', ' ', $element );
			$element = preg_replace( '#\s' . $name . '\s*=\s*[^"\'][^\s>]+#is', ' ', $element );
		}

		/**
		 * Remove the background image URL from a style attribute.
		 *
		 * @param string $attribute The element's style attribute to modify.
		 * @return string The style attribute with any image url removed.
		 */
		function remove_background_image( $attribute ) {
			if ( false !== strpos( $attribute, 'background:' ) && false !== strpos( $attribute, 'url(' ) ) {
				$attribute = preg_replace( '#\s?url\([^)]+\)#', '', $attribute );
			}
			if ( false !== strpos( $attribute, 'background-image:' ) && false !== strpos( $attribute, 'url(' ) ) {
				$attribute = preg_replace( '#background-image:\s*url\([^)]+\);?#', '', $attribute );
			}
			return $attribute;
		}

		/**
		 * A wrapper for PHP's parse_url, prepending assumed scheme for network path
		 * URLs. PHP versions 5.4.6 and earlier do not correctly parse without scheme.
		 *
		 * @param string  $url The URL to parse.
		 * @param integer $component Retrieve specific URL component.
		 * @return mixed Result of parse_url.
		 */
		function parse_url( $url, $component = -1 ) {
			if ( 0 === strpos( $url, '//' ) ) {
				$url = ( is_ssl() ? 'https:' : 'http:' ) . $url;
			}
			if ( false === strpos( $url, 'http' ) && '/' !== substr( $url, 0, 1 ) ) {
				$url = ( is_ssl() ? 'https://' : 'http://' ) . $url;
			}
			// Because encoded ampersands in the filename break things.
			$url = str_replace( '&#038;', '&', $url );
			return parse_url( $url, $component );
		}
	}
}

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