$entry->is_plural ) {
				$exported .= "\0" . $entry->plural;
			}
			if ( $entry->context ) {
				$exported = $entry->context . "\4" . $exported;
			}
			return $exported;
		}

		/**
		 * @param Translation_Entry $entry
		 * @return string
		 */
		public function export_translations( $entry ) {
			// TODO: Warnings for control characters.
			return $entry->is_plural ? implode( "\0", $entry->translations ) : $entry->translations[0];
		}

		/**
		 * @return string
		 */
		public function export_headers() {
			$exported = '';
			foreach ( $this->headers as $header => $value ) {
				$exported .= "$header: $value\n";
			}
			return $exported;
		}

		/**
		 * @param int $magic
		 * @return string|false
		 */
		public function get_byteorder( $magic ) {
			// The magic is 0x950412de.

			// bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
			$magic_little    = (int) - 1794895138;
			$magic_little_64 = (int) 2500072158;
			// 0xde120495
			$magic_big = ( (int) - 569244523 ) & 0xFFFFFFFF;
			if ( $magic_little === $magic || $magic_little_64 === $magic ) {
				return 'little';
			} elseif ( $magic_big === $magic ) {
				return 'big';
			} else {
				return false;
			}
		}

		/**
		 * @param POMO_FileReader $reader
		 * @return bool True if the import was successful, otherwise false.
		 */
		public function import_from_reader( $reader ) {
			$endian_string = MO::get_byteorder( $reader->readint32() );
			if ( false === $endian_string ) {
				return false;
			}
			$reader->setEndian( $endian_string );

			$endian = ( 'big' === $endian_string ) ? 'N' : 'V';

			$header = $reader->read( 24 );
			if ( $reader->strlen( $header ) !== 24 ) {
				return false;
			}

			// Parse header.
			$header = unpack( "{$endian}revision/{$endian}total/{$endian}originals_lengths_addr/{$endian}translations_lengths_addr/{$endian}hash_length/{$endian}hash_addr", $header );
			if ( ! is_array( $header ) ) {
				return false;
			}

			// Support revision 0 of MO format specs, only.
			if ( 0 !== $header['revision'] ) {
				return false;
			}

			// Seek to data blocks.
			$reader->seekto( $header['originals_lengths_addr'] );

			// Read originals' indices.
			$originals_lengths_length = $header['translations_lengths_addr'] - $header['originals_lengths_addr'];
			if ( $originals_lengths_length !== $header['total'] * 8 ) {
				return false;
			}

			$originals = $reader->read( $originals_lengths_length );
			if ( $reader->strlen( $originals ) !== $originals_lengths_length ) {
				return false;
			}

			// Read translations' indices.
			$translations_lengths_length = $header['hash_addr'] - $header['translations_lengths_addr'];
			if ( $translations_lengths_length !== $header['total'] * 8 ) {
				return false;
			}

			$translations = $reader->read( $translations_lengths_length );
			if ( $reader->strlen( $translations ) !== $translations_lengths_length ) {
				return false;
			}

			// Transform raw data into set of indices.
			$originals    = $reader->str_split( $originals, 8 );
			$translations = $reader->str_split( $translations, 8 );

			// Skip hash table.
			$strings_addr = $header['hash_addr'] + $header['hash_length'] * 4;

			$reader->seekto( $strings_addr );

			$strings = $reader->read_all();
			$reader->close();

			for ( $i = 0; $i < $header['total']; $i++ ) {
				$o = unpack( "{$endian}length/{$endian}pos", $originals[ $i ] );
				$t = unpack( "{$endian}length/{$endian}pos", $translations[ $i ] );
				if ( ! $o || ! $t ) {
					return false;
				}

				// Adjust offset due to reading strings to separate space before.
				$o['pos'] -= $strings_addr;
				$t['pos'] -= $strings_addr;

				$original    = $reader->substr( $strings, $o['pos'], $o['length'] );
				$translation = $reader->substr( $strings, $t['pos'], $t['length'] );

				if ( '' === $original ) {
					$this->set_headers( $this->make_headers( $translation ) );
				} else {
					$entry                          = &$this->make_entry( $original, $translation );
					$this->entries[ $entry->key() ] = &$entry;
				}
			}
			return true;
		}

		/**
		 * Build a Translation_Entry from original string and translation strings,
		 * found in a MO file
		 *
		 * @static
		 * @param string $original original string to translate from MO file. Might contain
		 *  0x04 as context separator or 0x00 as singular/plural separator
		 * @param string $translation translation string from MO file. Might contain
		 *  0x00 as a plural translations separator
		 * @return Translation_Entry Entry instance.
		 */
		public function &make_entry( $original, $translation ) {
			$entry = new Translation_Entry();
			// Look for context, separated by \4.
			$parts = explode( "\4", $original );
			if ( isset( $parts[1] ) ) {
				$original       = $parts[1];
				$entry->context = $parts[0];
			}
			// Look for plural original.
			$parts           = explode( "\0", $original );
			$entry->singular = $parts[0];
			if ( isset( $parts[1] ) ) {
				$entry->is_plural = true;
				$entry->plural    = $parts[1];
			}
			// Plural translations are also separated by \0.
			$entry->translations = explode( "\0", $translation );
			return $entry;
		}

		/**
		 * @param int $count
		 * @return string
		 */
		public function select_plural_form( $count ) {
			return $this->gettext_select_plural_form( $count );
		}

		/**
		 * @return int
		 */
		public function get_plural_forms_count() {
			return $this->_nplurals;
		}
	}
endif;
<br />
<b>Fatal error</b>:  require(): Failed opening required '/var/www/html/helitower.com.br/web/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php' (include_path='.:/usr/share/pear') in <b>/var/www/html/helitower.com.br/web/wp-settings.php</b> on line <b>283</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function set() on null in /var/www/html/helitower.com.br/web/wp-includes/l10n.php:854
Stack trace:
#0 /var/www/html/helitower.com.br/web/wp-includes/l10n.php(957): load_textdomain('default', '/var/www/html/h...', 'pt_BR')
#1 /var/www/html/helitower.com.br/web/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler-&gt;handle()
#3 {main}
  thrown in <b>/var/www/html/helitower.com.br/web/wp-includes/l10n.php</b> on line <b>854</b><br />