*Proof of concept to enable intermediate hook profiling on PHP7

command.php

@@ -0,0 +1,12 @@
+<?php
+
+if ( class_exists( 'WP_CLI' ) ) {
+	require_once dirname( __FILE__ ) . '/inc/class-command.php';
+	require_once dirname( __FILE__ ) . '/inc/class-formatter.php';
+	require_once dirname( __FILE__ ) . '/inc/class-logger.php';
+	require_once dirname( __FILE__ ) . '/inc/class-profiler.php';
+	if ( version_compare( PHP_VERSION, '7.0.0' ) >= 0 ) {
+		require_once dirname( __FILE__ ) . '/inc/class-filestreamwrapper.php';
+	}
+	WP_CLI::add_command( 'profile', 'runcommand\Profile\Command' );
+}

inc/class-filestreamwrapper.php

@@ -0,0 +1,150 @@
+<?php
+
+namespace runcommand\Profile;
+
+/**
+ * Stream Wrapper Class to create a temporary file with ticks enabled
+ * Props to https://github.com/hakre for the original P.O.C.
+ *
+ * Class FileStreamWrapper
+ *
+ * @package runcommand\Profile
+ * @author  Derrick Hammer
+ */
+class FileStreamWrapper {
+	/**
+	 * @var string
+	 */
+	const PROTOCOL = 'file';
+	/**
+	 * @var string
+	 */
+	const PHP_TICK = "\ndeclare(ticks=1);\n";
+	/**
+	 * @var resource
+	 */
+	public $context;
+	/**
+	 * @var resource
+	 */
+	private $handle;
+	/**
+	 * @var string
+	 */
+	private $file;
+
+	public function stream_open( $path, $mode, $options, &$opened_path ) {
+
+		if ( isset( $this->handle ) ) {
+			throw new \UnexpectedValueException( 'Handle congruency' );
+		}
+
+		$use_include_path = true;
+
+		$context = $this->context;
+		if ( null === $context ) {
+			$context = stream_context_get_default();
+		}
+		self::restore();
+		$data = @file_get_contents( $path );
+
+		if ( false !== $data && preg_match( '~^(<\?php\s*)$~m', $data ) ) {
+			$result     = preg_replace(
+				'~^(<\?php\s*)$~m',
+				'\\0' . self::PHP_TICK,
+				$data,
+				1
+			);
+			$pathinfo   = pathinfo( $path );
+			$this->file = $pathinfo['dirname'] . DIRECTORY_SEPARATOR . $pathinfo['filename'] . '_profile.' . $pathinfo['extension'];
+			file_put_contents( $this->file, $result );
+			$handle = @fopen( $this->file, $mode, $use_include_path, $context );
+
+		} else {
+			$handle = @fopen( $path, $mode, $use_include_path, $context );
+		}
+		self::init();
+		if ( false === $handle ) {
+			return false;
+		}
+
+
+		$meta = stream_get_meta_data( $handle );
+		if ( ! isset( $meta['uri'] ) ) {
+			throw new \UnexpectedValueException( 'Uri not in meta data' );
+		}
+
+		$opened_path = $meta['uri'];
+
+		$this->handle = $handle;
+
+		if ( $this->file ) {
+			register_shutdown_function( [ $this, 'cleanup' ] );
+		}
+
+		return true;
+	}
+
+	public static function restore() {
+		$result = stream_wrapper_restore( self::PROTOCOL );
+		if ( false === $result ) {
+			throw new \UnexpectedValueException( 'Failed to restore' );
+		}
+	}
+
+	public static function init() {
+		$result = stream_wrapper_unregister( self::PROTOCOL );
+		if ( false === $result ) {
+			throw new \UnexpectedValueException( 'Failed to unregister' );
+		}
+		stream_wrapper_register( self::PROTOCOL, '\runcommand\Profile\FileStreamWrapper', 0 );
+	}
+
+	/**
+	 * @return array
+	 */
+	public function stream_stat() {
+		self::restore();
+		$array = @fstat( $this->handle );
+		self::init();
+
+		return $array;
+	}
+
+	/**
+	 * @param $count
+	 *
+	 * @return string
+	 */
+	public function stream_read( $count ) {
+		self::restore();
+		$result = fread( $this->handle, $count );
+		self::init();
+
+		return $result;
+	}
+
+	public function stream_eof() {
+		self::restore();
+		$result = @feof( $this->handle );
+		self::init();
+
+		return $result;
+	}
+
+	public function stream_set_option( $option, $arg1, $arg2 ) {
+		return true;
+	}
+
+	public function url_stat( $path, $flags ) {
+		self::restore();
+		$array = @stat( $path );
+		self::init();
+
+		return $array;
+	}
+
+	public function cleanup() {
+		@unlink( $this->file );
+	}
+}

src/Profiler.php

@@ -47,6 +47,7 @@ class Profiler {
 	private $tick_query_offset      = null;
 	private $tick_cache_hit_offset  = null;
 	private $tick_cache_miss_offset = null;
+	private $is_php7 = false;
 
 	public function __construct( $type, $focus ) {
 		$this->type  = $type;
@@ -99,6 +100,9 @@ class Profiler {
 				}
 			}
 		);
+
+		$this->is_php7 = version_compare( PHP_VERSION, '7.0.0' ) >= 0;
+
 		if ( 'hook' === $this->type
 			&& ':before' === substr( $this->focus, -7, 7 ) ) {
 			$stage_hooks = array();
@@ -131,10 +135,6 @@ class Profiler {
 	 */
 	public function wp_tick_profile_begin( $value = null ) {
 
-		if ( version_compare( PHP_VERSION, '7.0.0' ) >= 0 ) {
-			WP_CLI::error( 'Profiling intermediate hooks is broken in PHP 7, see https://bugs.php.net/bug.php?id=72966' );
-		}
-
 		// Disable opcode optimizers.  These "optimize" calls out of the stack
 		// and hide calls from the tick handler and backtraces.
 		// Copied from P3 Profiler
@@ -157,8 +157,13 @@ class Profiler {
 			// WordPress.PHP.NoSilencedErrors.Discouraged -- ini_set can be disabled on server.
 		}
 
-		register_tick_function( array( $this, 'handle_function_tick' ) );
-		declare( ticks = 1 );
+		declare( ticks=1 );
+
+		if ( $this->is_php7 ) {
+			register_tick_function( array( $this, 'handle_function_tick' ) );
+			FileStreamWrapper::init();
+		}
+
 		return $value;
 	}
 
@@ -167,6 +172,7 @@ class Profiler {
 	 */
 	public function wp_tick_profile_end( $value = null ) {
 		unregister_tick_function( array( $this, 'handle_function_tick' ) );
+		FileStreamWrapper::restore();
 		$this->tick_callback = null;
 		return $value;
 	}
@@ -340,8 +346,9 @@ class Profiler {
 
 		$location = '';
 		$callback = '';
-		if ( in_array( strtolower( $frame['function'] ), array( 'include', 'require', 'include_once', 'require_once' ), true ) ) {
-			$callback = $frame['function'] . " '" . $frame['args'][0] . "'";
+		if ( in_array( strtolower( $frame['function'] ), [ 'include', 'require', 'include_once', 'require_once' ] ) ) {
+			$ext = pathinfo( $frame['args'][0] , PATHINFO_EXTENSION);
+			$callback = $frame['function'] . " '" . str_replace( "_profile.{$ext}"  ,  ".{$ext}", $frame['args'][0]) . "'";
 		} elseif ( isset( $frame['object'] ) && method_exists( $frame['object'], $frame['function'] ) ) {
 			$callback = get_class( $frame['object'] ) . '->' . $frame['function'] . '()';
 		} elseif ( isset( $frame['class'] ) && method_exists( $frame['class'], $frame['function'] ) ) {
@@ -358,7 +365,8 @@ class Profiler {
 		}
 
 		if ( isset( $frame['file'] ) ) {
-			$location = $frame['file'];
+			$ext      = pathinfo( $frame['file'], PATHINFO_EXTENSION );
+			$location = str_replace( "_profile.{$ext}", ".{$ext}", $frame['args'][0] );
 			if ( isset( $frame['line'] ) ) {
 				$location .= ':' . $frame['line'];
 			}