', __( 'Please contact your host for assistance with investigating this issue further.' ) );

		/**
		 * Filters the debug information included in the fatal error protection email.
		 *
		 * @since 5.3.0
		 *
		 * @param array $message An associative array of debug information.
		 */
		$debug = apply_filters( 'recovery_email_debug_info', $this->get_debug( $extension ) );

		/* translators: Do not translate LINK, EXPIRES, CAUSE, DETAILS, SITEURL, PAGEURL, SUPPORT. DEBUG: those are placeholders. */
		$message = __(
			'Howdy!

WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.
###CAUSE###
First, visit your website (###SITEURL###) and check for any visible issues. Next, visit the page where the error was caught (###PAGEURL###) and check for any visible issues.

###SUPPORT###

If your site appears broken and you can\'t access your dashboard normally, WordPress now has a special "recovery mode". This lets you safely login to your dashboard and investigate further.

###LINK###

To keep your site safe, this link will expire in ###EXPIRES###. Don\'t worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

When seeking help with this issue, you may be asked for some of the following information:
###DEBUG###

###DETAILS###'
		);
		$message = str_replace(
			array(
				'###LINK###',
				'###EXPIRES###',
				'###CAUSE###',
				'###DETAILS###',
				'###SITEURL###',
				'###PAGEURL###',
				'###SUPPORT###',
				'###DEBUG###',
			),
			array(
				$url,
				human_time_diff( time() + $rate_limit ),
				$cause ? "\n{$cause}\n" : "\n",
				$details,
				home_url( '/' ),
				home_url( $_SERVER['REQUEST_URI'] ),
				$support,
				implode( "\r\n", $debug ),
			),
			$message
		);

		$email = array(
			'to'          => $this->get_recovery_mode_email_address(),
			/* translators: %s: Site title. */
			'subject'     => __( '[%s] Your Site is Experiencing a Technical Issue' ),
			'message'     => $message,
			'headers'     => '',
			'attachments' => '',
		);

		/**
		 * Filters the contents of the Recovery Mode email.
		 *
		 * @since 5.2.0
		 * @since 5.6.0 The `$email` argument includes the `attachments` key.
		 *
		 * @param array  $email {
		 *     Used to build a call to wp_mail().
		 *
		 *     @type string|array $to          Array or comma-separated list of email addresses to send message.
		 *     @type string       $subject     Email subject
		 *     @type string       $message     Message contents
		 *     @type string|array $headers     Optional. Additional headers.
		 *     @type string|array $attachments Optional. Files to attach.
		 * }
		 * @param string $url   URL to enter recovery mode.
		 */
		$email = apply_filters( 'recovery_mode_email', $email, $url );

		$sent = wp_mail(
			$email['to'],
			wp_specialchars_decode( sprintf( $email['subject'], $blogname ) ),
			$email['message'],
			$email['headers'],
			$email['attachments']
		);

		if ( $switched_locale ) {
			restore_previous_locale();
		}

		return $sent;
	}

	/**
	 * Gets the email address to send the recovery mode link to.
	 *
	 * @since 5.2.0
	 *
	 * @return string Email address to send recovery mode link to.
	 */
	private function get_recovery_mode_email_address() {
		if ( defined( 'RECOVERY_MODE_EMAIL' ) && is_email( RECOVERY_MODE_EMAIL ) ) {
			return RECOVERY_MODE_EMAIL;
		}

		return get_option( 'admin_email' );
	}

	/**
	 * Gets the description indicating the possible cause for the error.
	 *
	 * @since 5.2.0
	 *
	 * @param array $extension {
	 *     The extension that caused the error.
	 *
	 *     @type string $slug The extension slug. The directory of the plugin or theme.
	 *     @type string $type The extension type. Either 'plugin' or 'theme'.
	 * }
	 * @return string Message about which extension caused the error.
	 */
	private function get_cause( $extension ) {

		if ( 'plugin' === $extension['type'] ) {
			$plugin = $this->get_plugin( $extension );

			if ( false === $plugin ) {
				$name = $extension['slug'];
			} else {
				$name = $plugin['Name'];
			}

			/* translators: %s: Plugin name. */
			$cause = sprintf( __( 'In this case, WordPress caught an error with one of your plugins, %s.' ), $name );
		} else {
			$theme = wp_get_theme( $extension['slug'] );
			$name  = $theme->exists() ? $theme->display( 'Name' ) : $extension['slug'];

			/* translators: %s: Theme name. */
			$cause = sprintf( __( 'In this case, WordPress caught an error with your theme, %s.' ), $name );
		}

		return $cause;
	}

	/**
	 * Return the details for a single plugin based on the extension data from an error.
	 *
	 * @since 5.3.0
	 *
	 * @param array $extension {
	 *     The extension that caused the error.
	 *
	 *     @type string $slug The extension slug. The directory of the plugin or theme.
	 *     @type string $type The extension type. Either 'plugin' or 'theme'.
	 * }
	 * @return array|false A plugin array {@see get_plugins()} or `false` if no plugin was found.
	 */
	private function get_plugin( $extension ) {
		if ( ! function_exists( 'get_plugins' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}

		$plugins = get_plugins();

		// Assume plugin main file name first since it is a common convention.
		if ( isset( $plugins[ "{$extension['slug']}/{$extension['slug']}.php" ] ) ) {
			return $plugins[ "{$extension['slug']}/{$extension['slug']}.php" ];
		} else {
			foreach ( $plugins as $file => $plugin_data ) {
				if ( str_starts_with( $file, "{$extension['slug']}/" ) || $file === $extension['slug'] ) {
					return $plugin_data;
				}
			}
		}

		return false;
	}

	/**
	 * Return debug information in an easy to manipulate format.
	 *
	 * @since 5.3.0
	 *
	 * @param array $extension {
	 *     The extension that caused the error.
	 *
	 *     @type string $slug The extension slug. The directory of the plugin or theme.
	 *     @type string $type The extension type. Either 'plugin' or 'theme'.
	 * }
	 * @return array An associative array of debug information.
	 */
	private function get_debug( $extension ) {
		$theme      = wp_get_theme();
		$wp_version = get_bloginfo( 'version' );

		$debug = array(
			'wp'    => sprintf(
				/* translators: %s: Current WordPress version number. */
				__( 'WordPress version %s' ),
				$wp_version
			),
			'theme' => sprintf(
				/* translators: 1: Current active theme name. 2: Current active theme version. */
				__( 'Active theme: %1$s (version %2$s)' ),
				$theme->get( 'Name' ),
				$theme->get( 'Version' )
			),
		);

		if ( $extension ) {
			$plugin = $this->get_plugin( $extension );

			if ( is_array( $plugin ) ) {
				$debug['plugin'] = sprintf(
					/* translators: 1: The failing plugin's name. 2: The failing plugin's version. */
					__( 'Current plugin: %1$s (version %2$s)' ),
					$plugin['Name'],
					$plugin['Version']
				);
			}
		}

		$debug['php'] = sprintf(
			/* translators: %s: The currently used PHP version. */
			__( 'PHP version %s' ),
			PHP_VERSION
		);

		return $debug;
	}
}
ubstr( $m[0], 1, -1 );
	}

	$tag  = $m[2];
	$attr = shortcode_parse_atts( $m[3] );

	if ( ! is_callable( $shortcode_tags[ $tag ] ) ) {
		_doing_it_wrong(
			__FUNCTION__,
			/* translators: %s: Shortcode tag. */
			sprintf( __( 'Attempting to parse a shortcode without a valid callback: %s' ), $tag ),
			'4.3.0'
		);
		return $m[0];
	}

	/**
	 * Filters whether to call a shortcode callback.
	 *
	 * Returning a non-false value from filter will short-circuit the
	 * shortcode generation process, returning that value instead.
	 *
	 * @since 4.7.0
	 * @since 6.5.0 The `$attr` parameter is always an array.
	 *
	 * @param false|string $output Short-circuit return value. Either false or the value to replace the shortcode with.
	 * @param string       $tag    Shortcode name.
	 * @param array        $attr   Shortcode attributes array, can be empty if the original arguments string cannot be parsed.
	 * @param array        $m      Regular expression match array.
	 */
	$return = apply_filters( 'pre_do_shortcode_tag', false, $tag, $attr, $m );
	if ( false !== $return ) {
		return $return;
	}

	$content = $m[5] ?? null;

	$output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];

	/**
	 * Filters the output created by a shortcode callback.
	 *
	 * @since 4.7.0
	 * @since 6.5.0 The `$attr` parameter is always an array.
	 *
	 * @param string $output Shortcode output.
	 * @param string $tag    Shortcode name.
	 * @param array  $attr   Shortcode attributes array, can be empty if the original arguments string cannot be parsed.
	 * @param array  $m      Regular expression match array.
	 */
	return apply_filters( 'do_shortcode_tag', $output, $tag, $attr, $m );
}

/**
 * Searches only inside HTML elements for shortcodes and process them.
 *
 * Any [ or ] characters remaining inside elements will be HTML encoded
 * to prevent interference with shortcodes that are outside the elements.
 * Assumes $content processed by KSES already.  Users with unfiltered_html
 * capability may get unexpected output if angle braces are nested in tags.
 *
 * @since 4.2.3
 *
 * @param string $content     Content to search for shortcodes.
 * @param bool   $ignore_html When true, all square braces inside elements will be encoded.
 * @param array  $tagnames    List of shortcodes to find.
 * @return string Content with shortcodes filtered out.
 */
function do_shortcodes_in_html_tags( $content, $ignore_html, $tagnames ) {
	// Normalize entities in unfiltered HTML before adding placeholders.
	$trans   = array(
		'[' => '[',
		']' => ']',
	);
	$content = strtr( $content, $trans );
	$trans   = array(
		'[' => '[',
		']' => ']',
	);

	$pattern = get_shortcode_regex( $tagnames );
	$textarr = wp_html_split( $content );

	foreach ( $textarr as &$element ) {
		if ( '' === $element || '<' !== $element[0] ) {
			continue;
		}

		$noopen  = ! str_contains( $element, '[' );
		$noclose = ! str_contains( $element, ']' );
		if ( $noopen || $noclose ) {
			// This element does not contain shortcodes.
			if ( $noopen xor $noclose ) {
				// Need to encode stray '[' or ']' chars.
				$element = strtr( $element, $trans );
			}
			continue;
		}

		if ( $ignore_html || str_starts_with( $element, '<!--' ) || str_starts_with( $element, '<![CDATA[' ) ) {
			// Encode all '[' and ']' chars.
			$element = strtr( $element, $trans );
			continue;
		}

		$attributes = wp_kses_attr_parse( $element );
		if ( false === $attributes ) {
			// Some plugins are doing things like [name] <[email]>.
			if ( 1 === preg_match( '%^<\s*\[\[?[^\[\]]+\]%', $element ) ) {
				$element = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $element );
			}

			// Looks like we found some unexpected unfiltered HTML. Skipping it for confidence.
			$element = strtr( $element, $trans );
			continue;
		}

		// Get element name.
		$front   = array_shift( $attributes );
		$back    = array_pop( $attributes );
		$matches = array();
		preg_match( '%[a-zA-Z0-9]+%', $front, $matches );
		$elname = $matches[0];

		// Look for shortcodes in each attribute separately.
		foreach ( $attributes as &$attr ) {
			$open  = strpos( $attr, '[' );
			$close = strpos( $attr, ']' );
			if ( false === $open || false === $close ) {
				continue; // Go to next attribute. Square braces will be escaped at end of loop.
			}
			$double = strpos( $attr, '"' );
			$single = strpos( $attr, "'" );
			if ( ( false === $single || $open < $single ) && ( false === $double || $open < $double ) ) {
				/*
				 * $attr like '[shortcode]' or 'name = [shortcode]' implies unfiltered_html.
				 * In this specific situation we assume KSES did not run because the input
				 * was written by an administrator, so we should avoid changing the output
				 * and we do not need to run KSES here.
				 */
				$attr = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $attr );
			} else {
				/*
				 * $attr like 'name = "[shortcode]"' or "name = '[shortcode]'".
				 * We do not know if $content was unfiltered. Assume KSES ran before shortcodes.
				 */
				$count    = 0;
				$new_attr = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $attr, -1, $count );
				if ( $count > 0 ) {
					// Sanitize the shortcode output using KSES.
					$new_attr = wp_kses_one_attr( $new_attr, $elname );
					if ( '' !== trim( $new_attr ) ) {
						// The shortcode is safe to use now.
						$attr = $new_attr;
					}
				}
			}
		}
		$element = $front . implode( '', $attributes ) . $back;

		// Now encode any remaining '[' or ']' chars.
		$element = strtr( $element, $trans );
	}

	$content = implode( '', $textarr );

	return $content;
}

/**
 * Removes placeholders added by do_shortcodes_in_html_tags().
 *
 * @since 4.2.3
 *
 * @param string $content Content to search for placeholders.
 * @return string Content with placeholders removed.
 */
function unescape_invalid_shortcodes( $content ) {
	// Clean up entire string, avoids re-parsing HTML.
	$trans = array(
		'&#91;' => '[',
		'&#93;' => ']',
	);

	$content = strtr( $content, $trans );

	return $content;
}

/**
 * Retrieves the shortcode attributes regex.
 *
 * @since 4.4.0
 *
 * @return string The shortcode attribute regular expression.
 */
function get_shortcode_atts_regex() {
	return '/([\w-]+)\s*=\s*"([^"]*)"(?:\s|$)|([\w-]+)\s*=\s*\'([^\']*)\'(?:\s|$)|([\w-]+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|\'([^\']*)\'(?:\s|$)|(\S+)(?:\s|$)/';
}

/**
 * Retrieves all attributes from the shortcodes tag.
 *
 * The attributes list has the attribute name as the key and the value of the
 * attribute as the value in the key/value pair. This allows for easier
 * retrieval of the attributes, since all attributes have to be known.
 *
 * @since 2.5.0
 * @since 6.5.0 The function now always returns an array,
 *              even if the original arguments string cannot be parsed or is empty.
 *
 * @param string $text Shortcode arguments list.
 * @return array Array of attribute values keyed by attribute name.
 *               Returns empty array if there are no attributes
 *               or if the original arguments string cannot be parsed.
 */
function shortcode_parse_atts( $text ) {
	$atts    = array();
	$pattern = get_shortcode_atts_regex();
	$text    = preg_replace( "/[\x{00a0}\x{200b}]+/u", ' ', $text );
	if ( preg_match_all( $pattern, $text, $match, PREG_SET_ORDER ) ) {
		foreach ( $match as $m ) {
			if ( ! empty( $m[1] ) ) {
				$atts[ strtolower( $m[1] ) ] = stripcslashes( $m[2] );
			} elseif ( ! empty( $m[3] ) ) {
				$atts[ strtolower( $m[3] ) ] = stripcslashes( $m[4] );
			} elseif ( ! empty( $m[5] ) ) {
				$atts[ strtolower( $m[5] ) ] = stripcslashes( $m[6] );
			} elseif ( isset( $m[7] ) && strlen( $m[7] ) ) {
				$atts[] = stripcslashes( $m[7] );
			} elseif ( isset( $m[8] ) && strlen( $m[8] ) ) {
				$atts[] = stripcslashes( $m[8] );
			} elseif ( isset( $m[9] ) ) {
				$atts[] = stripcslashes( $m[9] );
			}
		}

		// Reject any unclosed HTML elements.
		foreach ( $atts as &$value ) {
			if ( str_contains( $value, '<' ) ) {
				if ( 1 !== preg_match( '/^[^<]*+(?:<[^>]*+>[^<]*+)*+$/', $value ) ) {
					$value = '';
				}
			}
		}
	}

	return $atts;
}

/**
 * Combines user attributes with known attributes and fill in defaults when needed.
 *
 * The pairs should be considered to be all of the attributes which are
 * supported by the caller and given as a list. The returned attributes will
 * only contain the attributes in the $pairs list.
 *
 * If the $atts list has unsupported attributes, then they will be ignored and
 * removed from the final returned list.
 *
 * @since 2.5.0
 *
 * @param array  $pairs     Entire list of supported attributes and their defaults.
 * @param array  $atts      User defined attributes in shortcode tag.
 * @param string $shortcode Optional. The name of the shortcode, provided for context to enable filtering
 * @return array Combined and filtered attribute list.
 */
function shortcode_atts( $pairs, $atts, $shortcode = '' ) {
	$atts = (array) $atts;
	$out  = array();
	foreach ( $pairs as $name => $default ) {
		if ( array_key_exists( $name, $atts ) ) {
			$out[ $name ] = $atts[ $name ];
		} else {
			$out[ $name ] = $default;
		}
	}

	if ( $shortcode ) {
		/**
		 * Filters shortcode attributes.
		 *
		 * If the third parameter of the shortcode_atts() function is present then this filter is available.
		 * The third parameter, $shortcode, is the name of the shortcode.
		 *
		 * @since 3.6.0
		 * @since 4.4.0 Added the `$shortcode` parameter.
		 *
		 * @param array  $out       The output array of shortcode attributes.
		 * @param array  $pairs     The supported attributes and their defaults.
		 * @param array  $atts      The user defined shortcode attributes.
		 * @param string $shortcode The shortcode name.
		 */
		$out = apply_filters( "shortcode_atts_{$shortcode}", $out, $pairs, $atts, $shortcode );
	}

	return $out;
}

/**
 * Removes all shortcode tags from the given content.
 *
 * @since 2.5.0
 *
 * @global array $shortcode_tags
 *
 * @param string $content Content to remove shortcode tags.
 * @return string Content without shortcode tags.
 */
function strip_shortcodes( $content ) {
	global $shortcode_tags;

	if ( ! str_contains( $content, '[' ) ) {
		return $content;
	}

	if ( empty( $shortcode_tags ) || ! is_array( $shortcode_tags ) ) {
		return $content;
	}

	// Find all registered tag names in $content.
	preg_match_all( '@\[([^<>&/\[\]\x00-\x20=]++)@', $content, $matches );

	$tags_to_remove = array_keys( $shortcode_tags );

	/**
	 * Filters the list of shortcode tags to remove from the content.
	 *
	 * @since 4.7.0
	 *
	 * @param array  $tags_to_remove Array of shortcode tags to remove.
	 * @param string $content        Content shortcodes are being removed from.
	 */
	$tags_to_remove = apply_filters( 'strip_shortcodes_tagnames', $tags_to_remove, $content );

	$tagnames = array_intersect( $tags_to_remove, $matches[1] );

	if ( empty( $tagnames ) ) {
		return $content;
	}

	$content = do_shortcodes_in_html_tags( $content, true, $tagnames );

	$pattern = get_shortcode_regex( $tagnames );
	$content = preg_replace_callback( "/$pattern/", 'strip_shortcode_tag', $content );

	// Always restore square braces so we don't break things like <!--[if IE ]>.
	$content = unescape_invalid_shortcodes( $content );

	return $content;
}

/**
 * Strips a shortcode tag based on RegEx matches against post content.
 *
 * @since 3.3.0
 *
 * @param array $m RegEx matches against post content.
 * @return string|false The content stripped of the tag, otherwise false.
 */
function strip_shortcode_tag( $m ) {
	// Allow [[foo]] syntax for escaping a tag.
	if ( '[' === $m[1] && ']' === $m[6] ) {
		return substr( $m[0], 1, -1 );
	}

	return $m[1] . $m[6];
}