PO::poify( string $input_string ): string

116		public static function poify( $input_string ) {117			$quote   = '"';118			$slash   = '\\';119			$newline = "\n";120 121			$replaces = array(122				"$slash" => "$slash$slash",123				"$quote" => "$slash$quote",124				"\t"     => '\t',125			);126 127			$input_string = str_replace( array_keys( $replaces ), array_values( $replaces ), $input_string );128 129			$po = $quote . implode( "{$slash}n{$quote}{$newline}{$quote}", explode( $newline, $input_string ) ) . $quote;130			// Add empty string on first line for readability.131			if ( str_contains( $input_string, $newline ) &&132				( substr_count( $input_string, $newline ) > 1 || substr( $input_string, -strlen( $newline ) ) !== $newline ) ) {133				$po = "$quote$quote$newline$po";134			}135			// Remove empty strings.136			$po = str_replace( "$newline$quote$quote", '', $po );137			return $po;138		}