class names, the second level array keys are method names, and
			 *                                                          the array values are whether to ignore the method (usually true).
			 */
			self::$ignore_method = array_filter( apply_filters( 'qm/trace/ignore_method', self::$ignore_method ) );

			/**
			 * Filters which action and filter names to ignore when constructing user-facing call stacks.
			 *
			 * @since 3.8.0
			 *
			 * @param array<string, bool> $ignore_hook Array of hook names to ignore. The array keys are hook names to ignore,
			 *                                         the array values are whether to ignore the hook (usually true).
			 */
			self::$ignore_hook = array_filter( apply_filters( 'qm/trace/ignore_hook', self::$ignore_hook ) );

			/**
			 * Filters the number of argument values to show for the given function name when constructing user-facing
			 * call stacks.
			 *
			 * @since 2.7.0
			 *
			 * @param array<string,int|string> $show_args The number of argument values to show for the given function name. The
			 *                                            array keys are function names, the array values are either integers or
			 *                                            "dir" to specifically treat the function argument as a directory path.
			 */
			self::$show_args = apply_filters( 'qm/trace/show_args', self::$show_args );

			self::$filtered = true;

		}
	}

	/**
	 * Formats a single trace frame and determines whether it should be hidden.
	 *
	 * @param mixed[] $frame A single frame from debug_backtrace().
	 * @param array<string, bool> $ignore_namespace
	 * @param array<string, array<string, bool>> $ignore_method
	 * @param array<string, bool> $ignore_hook
	 * @param array<string, int|string> $show_args
	 */
	public function filter_trace( array $frame, array $ignore_namespace, array $ignore_method, array $ignore_hook, array $show_args ) :? QM_Backtrace_Frame {

		$hook_functions = array(
			'apply_filters' => true,
			'do_action' => true,
			'apply_filters_ref_array' => true,
			'do_action_ref_array' => true,
			'apply_filters_deprecated' => true,
			'do_action_deprecated' => true,
		);

		if ( ! isset( $frame['function'] ) ) {
			$frame['function'] = '(unknown)';
		}

		$id = '';
		$frame_args = null;

			if ( isset( $frame['class'] ) ) {
			// WP_Hook methods are always filtered out. The do_action/apply_filters
			// frame below them is retained with its original file/line.
			if ( 'WP_Hook' === $frame['class'] ) {
				return null;
			}

			if ( isset( $ignore_method[ $frame['class'] ][ $frame['function'] ] ) ) {
				return null;
			}

			foreach ( array_keys( $ignore_namespace ) as $namespace ) {
				if ( 0 === strpos( $frame['class'], $namespace . '\\' ) ) {
					return null;
				}
			}

			$id = $frame['class'] . $frame['type'] . $frame['function'];
		} else {
			foreach ( array_keys( $ignore_namespace ) as $namespace ) {
				if ( 0 === strpos( $frame['function'], $namespace . '\\' ) ) {
					return null;
				}
			}

			if ( isset( $show_args[ $frame['function'] ] ) ) {
				$show = $show_args[ $frame['function'] ];

				if ( 'dir' === $show ) {
					if ( isset( $frame['args'][0] ) ) {
						$id = $frame['function'];
						$frame_args = QM_Util::standard_dir( $frame['args'][0], '' );
					}
				} else {
					if ( isset( $hook_functions[ $frame['function'] ], $frame['args'][0] ) && is_string( $frame['args'][0] ) && isset( $ignore_hook[ $frame['args'][0] ] ) ) {
						return null;
					}

					$args = array();
					for ( $i = 0; $i < $show; $i++ ) {
						if ( isset( $frame['args'] ) && array_key_exists( $i, $frame['args'] ) ) {
							if ( is_string( $frame['args'][ $i ] ) ) {
								$args[] = '\'' . $frame['args'][ $i ] . '\'';
							} else {
								$args[] = QM_Util::display_variable( $frame['args'][ $i ] );
							}
						}
					}
					$id = $frame['function'];
					$frame_args = implode( ',', $args );
				}
			} else {
				$id = $frame['function'];
			}
		}

		$result = new QM_Backtrace_Frame();
		$result->id = $id;
		$result->args = $frame_args;
		$result->file = $frame['file'] ?? null;
		$result->line = $frame['line'] ?? null;
		$result->function = $frame['function'];

		if ( isset( $frame['class'] ) ) {
			$result->class = $frame['class'];
		}

		// Hook dispatch functions keep their original file/line so clicking
		// them takes you to the do_action/apply_filters call site, not to
		// the internal location where WP_Hook invokes the callback.
		if ( isset( $hook_functions[ $frame['function'] ] ) ) {
			$result->keep_file_line = true;
		}

		return $result;

	}

	/**
	 * Shifts file/line numbers and registers each frame with the frame
	 * registry. Called eagerly from the constructor so the registry is
	 * populated without needing a separate serialization pass.
	 *
	 * @param QM_Backtrace_Frame[] $trace
	 * @return void
	 */
	protected function process_output_frames( array $trace ): void {
		// Seed the shift from the innermost dropped/trimmed frame's location,
		// or from the call site for PHP error traces.
		$prev_file = $this->top_frame_location['file'] ?? ( $this->callsite ? $this->callsite->file : null );
		$prev_line = $this->top_frame_location['line'] ?? ( $this->callsite ? $this->callsite->line : null );

		foreach ( $trace as $frame ) {
			$data = $frame->to_data();

			if ( $frame->keep_file_line ) {
				// Hook dispatch frames (do_action, apply_filters) keep their
				// original file/line. Update prev so the frame below gets
				// shifted to this location (where it calls the hook).
				$prev_file = $frame->file;
				$prev_line = $frame->line;
			} else {
				// Shift file/line up by one frame so each frame shows where it
				// makes its call to the frame above, not where it was called from.
				$data->file = $prev_file;
				$data->line = $prev_line;

				$prev_file = $frame->file;
				$prev_line = $frame->line;
			}

			$this->output_frames[] = array( QM_Frame_Registry::register( $data ), $data->line );
		}
	}

	/**
	 * @phpstan-return array{
	 *   component: QM_Component,
	 *   callsite: ?QM_Data_Callsite,
	 *   frames: list<array{int, int|null}>,
	 *   time: float,
	 * }
	 */
	public function jsonSerialize(): array {
		return array(
			'component' => $this->get_component(),
			'callsite' => $this->callsite,
			'frames' => $this->output_frames,
			'time' => ( $this->time - $_SERVER['REQUEST_TIME_FLOAT'] ) * 1000,
		);
	}
}
} else {

	add_action( 'init', 'QueryMonitor::symlink_warning' );

}
            class names, the second level array keys are method names, and
			 *                                                          the array values are whether to ignore the method (usually true).
			 */
			self::$ignore_method = array_filter( apply_filters( 'qm/trace/ignore_method', self::$ignore_method ) );

			/**
			 * Filters which action and filter names to ignore when constructing user-facing call stacks.
			 *
			 * @since 3.8.0
			 *
			 * @param array<string, bool> $ignore_hook Array of hook names to ignore. The array keys are hook names to ignore,
			 *                                         the array values are whether to ignore the hook (usually true).
			 */
			self::$ignore_hook = array_filter( apply_filters( 'qm/trace/ignore_hook', self::$ignore_hook ) );

			/**
			 * Filters the number of argument values to show for the given function name when constructing user-facing
			 * call stacks.
			 *
			 * @since 2.7.0
			 *
			 * @param array<string,int|string> $show_args The number of argument values to show for the given function name. The
			 *                                            array keys are function names, the array values are either integers or
			 *                                            "dir" to specifically treat the function argument as a directory path.
			 */
			self::$show_args = apply_filters( 'qm/trace/show_args', self::$show_args );

			self::$filtered = true;

		}
	}

	/**
	 * Formats a single trace frame and determines whether it should be hidden.
	 *
	 * @param mixed[] $frame A single frame from debug_backtrace().
	 * @param array<string, bool> $ignore_namespace
	 * @param array<string, array<string, bool>> $ignore_method
	 * @param array<string, bool> $ignore_hook
	 * @param array<string, int|string> $show_args
	 */
	public function filter_trace( array $frame, array $ignore_namespace, array $ignore_method, array $ignore_hook, array $show_args ) :? QM_Backtrace_Frame {

		$hook_functions = array(
			'apply_filters' => true,
			'do_action' => true,
			'apply_filters_ref_array' => true,
			'do_action_ref_array' => true,
			'apply_filters_deprecated' => true,
			'do_action_deprecated' => true,
		);

		if ( ! isset( $frame['function'] ) ) {
			$frame['function'] = '(unknown)';
		}

		$id = '';
		$frame_args = null;

			if ( isset( $frame['class'] ) ) {
			// WP_Hook methods are always filtered out. The do_action/apply_filters
			// frame below them is retained with its original file/line.
			if ( 'WP_Hook' === $frame['class'] ) {
				return null;
			}

			if ( isset( $ignore_method[ $frame['class'] ][ $frame['function'] ] ) ) {
				return null;
			}

			foreach ( array_keys( $ignore_namespace ) as $namespace ) {
				if ( 0 === strpos( $frame['class'], $namespace . '\\' ) ) {
					return null;
				}
			}

			$id = $frame['class'] . $frame['type'] . $frame['function'];
		} else {
			foreach ( array_keys( $ignore_namespace ) as $namespace ) {
				if ( 0 === strpos( $frame['function'], $namespace . '\\' ) ) {
					return null;
				}
			}

			if ( isset( $show_args[ $frame['function'] ] ) ) {
				$show = $show_args[ $frame['function'] ];

				if ( 'dir' === $show ) {
					if ( isset( $frame['args'][0] ) ) {
						$id = $frame['function'];
						$frame_args = QM_Util::standard_dir( $frame['args'][0], '' );
					}
				} else {
					if ( isset( $hook_functions[ $frame['function'] ], $frame['args'][0] ) && is_string( $frame['args'][0] ) && isset( $ignore_hook[ $frame['args'][0] ] ) ) {
						return null;
					}

					$args = array();
					for ( $i = 0; $i < $show; $i++ ) {
						if ( isset( $frame['args'] ) && array_key_exists( $i, $frame['args'] ) ) {
							if ( is_string( $frame['args'][ $i ] ) ) {
								$args[] = '\'' . $frame['args'][ $i ] . '\'';
							} else {
								$args[] = QM_Util::display_variable( $frame['args'][ $i ] );
							}
						}
					}
					$id = $frame['function'];
					$frame_args = implode( ',', $args );
				}
			} else {
				$id = $frame['function'];
			}
		}

		$result = new QM_Backtrace_Frame();
		$result->id = $id;
		$result->args = $frame_args;
		$result->file = $frame['file'] ?? null;
		$result->line = $frame['line'] ?? null;
		$result->function = $frame['function'];

		if ( isset( $frame['class'] ) ) {
			$result->class = $frame['class'];
		}

		// Hook dispatch functions keep their original file/line so clicking
		// them takes you to the do_action/apply_filters call site, not to
		// the internal location where WP_Hook invokes the callback.
		if ( isset( $hook_functions[ $frame['function'] ] ) ) {
			$result->keep_file_line = true;
		}

		return $result;

	}

	/**
	 * Shifts file/line numbers and registers each frame with the frame
	 * registry. Called eagerly from the constructor so the registry is
	 * populated without needing a separate serialization pass.
	 *
	 * @param QM_Backtrace_Frame[] $trace
	 * @return void
	 */
	protected function process_output_frames( array $trace ): void {
		// Seed the shift from the innermost dropped/trimmed frame's location,
		// or from the call site for PHP error traces.
		$prev_file = $this->top_frame_location['file'] ?? ( $this->callsite ? $this->callsite->file : null );
		$prev_line = $this->top_frame_location['line'] ?? ( $this->callsite ? $this->callsite->line : null );

		foreach ( $trace as $frame ) {
			$data = $frame->to_data();

			if ( $frame->keep_file_line ) {
				// Hook dispatch frames (do_action, apply_filters) keep their
				// original file/line. Update prev so the frame below gets
				// shifted to this location (where it calls the hook).
				$prev_file = $frame->file;
				$prev_line = $frame->line;
			} else {
				// Shift file/line up by one frame so each frame shows where it
				// makes its call to the frame above, not where it was called from.
				$data->file = $prev_file;
				$data->line = $prev_line;

				$prev_file = $frame->file;
				$prev_line = $frame->line;
			}

			$this->output_frames[] = array( QM_Frame_Registry::register( $data ), $data->line );
		}
	}

	/**
	 * @phpstan-return array{
	 *   component: QM_Component,
	 *   callsite: ?QM_Data_Callsite,
	 *   frames: list<array{int, int|null}>,
	 *   time: float,
	 * }
	 */
	public function jsonSerialize(): array {
		return array(
			'component' => $this->get_component(),
			'callsite' => $this->callsite,
			'frames' => $this->output_frames,
			'time' => ( $this->time - $_SERVER['REQUEST_TIME_FLOAT'] ) * 1000,
		);
	}
}
} else {

	add_action( 'init', 'QueryMonitor::symlink_warning' );

}