This document discusses PHP 7 and alternative PHP implementations like HHVM. It provides an overview of PHP 7 features like a reworked engine and true 64-bit support. It also discusses alternative implementations like HHVM, which uses a just-in-time compiler to compile PHP to native machine code, and Zephir, which allows PHP code to be compiled to C code for performance benefits. Finally, it shares benchmarks showing performance improvements of these implementations over PHP 5.

1. Pierre Joye PHP7, hhvm & co
PHP 7, HHVM & CO
Pierre Joye

2. Pierre Joye PHP7, hhvm & co
Pierre Joye
@pierrejoye
pierre@php.net
http://www.slideshare.net/pierrej
PHP Core developer
Contributors to numerous OSS projects
Portability fan

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Stats

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What‘s going in the php world?
https://wiki.php.net/rfc/isset_ternary

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PHP 5.3
2009 - 2014

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PHP 5.4
Security fixes only

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PHP 5.6.0 is out!
(btw, 5.6.1 too)

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5 + 1 = 7

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Roadmap

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Features
• Rewamped Engine
• True 64bit support
• Large string and LFS (Large file support)
• Consistent variables syntax
• No more fatal error on calling method on non
object
• New ?? operator
• Many features under discussions

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Recoverable error for non object

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Recoverable error for non object
<?php set_error_handler(function($code,$message) {
var_dump($code, $message);
});
$x= null; var_dump($x->method());
echo "Aliven";
https://wiki.php.net/rfc/catchable-call-to-member-of-non-object

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Null Coalesce Operator (??)

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Null Coalesce Operator (??)
<?php
$username = $_GET['user'] ?? 'nobody';
$username = isset($_GET['user']) ? $_GET['user'] : 'nobody';
// Method/function call
$model = Model::get($id) ?? $default_model;
if (($model = Model::get($id)) === NULL) { $model =
$default_model; }
// Chained
$x = NULL; $y = NULL; $z = 3; var_dump($x ?? $y ?? $z);
https://wiki.php.net/rfc/isset_ternary

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PHP Language Specification
https://github.com/php/php-langspec

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Open & Public Specifications
Competions++

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(Most) Focus on Speed

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SPEED is NOT SCALE

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SPEED is UX

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Scale is Server Side
Architecture (Apps, Ops, Net, …)

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My code sucks.

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Yours too.

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Steroids++

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So?

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QB
<?php
class OilPaintFilter {
/** @var int32 */ public $levels = 25;
/** @var int32 */ public $filterSize = 5;
/** * @engine qb
*
* @param image $dst
* @param image $src
*
* @local float32[*][r,g,b,a] $bin
* @local float32 $max_intensity
* @local int32 $(current_index|max_index)
* @local int32 $(filter_x|filter_y|filter_offset)
* @local int32 $(x|y|x_limit|y_limit)
* @local int32 $(width|height)
* @local float32[r,g,b,a] $pixel
* @local float32 $multiplier */
public function filter(&$dst, $src) {…

31. Pierre Joye PHP7, hhvm & co
QB
<?php
function calc($n, &$a) {
$b = 18;
while($n) {
$a = $b * $b * $b * $b;
$n--;
}
}
$n = 5000000;
$a = 0;
calc($n, $a); $end = microtime(true);

32. Pierre Joye PHP7, hhvm & co
QB
Source: http://php-qb.net/index.php/2-uncategorised/27-comparing-performance-in-qb-with-hhvm

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Zephir

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Zephir
Optimization & code generation
Compilation + optimization
Native execution

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Zephir
namespace MyLibrary;
class Filter {
public function alpha(string str) {
char ch;
string filtered = "";
for ch in str {
if (ch >= 'a' && ch <= 'z') || (ch >=
'A' && ch <= 'Z') {
let filtered .= ch;
}
}
return filtered;
}
}

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Zephir
<?php
$filter = new MyLibraryFilter();
echo $filter>alpha("01he#l.lo?/1");

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PHP Alternative Implementations

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PHP Alternative Implementations
• PHP7 (formely known as phpng)
• HHVM (native code)
• Recki-ct (native code)
• Phalanger (.net engine)

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Recki-ct

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Recki-CT
PHP Cache
Parser (AST in 7+)
Recki IR
JIT~
Native Code

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Recki-ct
php 5.5 Recki-CT hhvm 3.2 hippy-c qb
simple() 139.63357 1.00000 8.30447 7.65693 8.35018
simplecall() 38.99476 FAIL 1.32552 1.00000 FAIL
simpleucall() 54.02041 1.00000 3.52439 1.51072 47.91090
simpleudcall
52.14534 1.00000 3.75936 1.41614 47.55259
()
mandel() 21.26249 1.00000 2.03372 2.11208 FAIL
mandel_typ
ed()
23.16553 1.00000 2.11128 2.09212 3.00061
mandel2() 24.43275 1.00000 2.57704 1.87802 FAIL
mandel2_ty
ped()
23.79989 1.00000 2.90105 1.57193 7.11054

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Recki-ct
php 5.5 Recki-CT hhvm 3.2 hippy-c qb
ary(50000) 1.39338 FAIL 1.00000 4.47888 FAIL
ary2(50000) 1.26952 FAIL 1.00000 2.28231 FAIL
ary3(2000) 5.96015 FAIL 1.70997 1.00000 FAIL
fibo(30) 39.48440 1.00000 1.60647 16.40883 FAIL
hash1(50000) 1.70014 FAIL 1.00000 3.27314 FAIL
hash2(500) 2.23648 FAIL 1.00000 1.30044 FAIL
heapsort(2000
3.67800 FAIL 1.00000 4.96699 FAIL
0)

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HHVM
PHP Cache
Parser (AST in 7+)
HHVM Opcodes
Native Code
Cache
JIT ~

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PHP
PHP Cache
Parser (AST in 7+)
OpCodes

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Resources
5.5 + opcache : 33.26 [#/sec]
7 (October 2014) + opcache : 41.61 [#/sec]
Hhvm (October 2014) : 57.74 [#/sec]

48. Pierre Joye PHP7, hhvm & co
Resources
• http://wiki.php.net/rfc/
• http://zephir-lang.com/
• http://www.slideshare.net/ircmaxell/high-performance-
php-phpnw
• https://github.com/google/recki-ct
• http://blog.ircmaxell.com/2014/08/introducing-recki-
ct.html
• https://github.com/chung-leong/
qb/wiki/Introduction

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Resources
• https://wiki.php.net/rfc/phpng
• https://wiki.php.net/rfc/abstract_syntax_tree
• http://hhvm.com/blog/6323/the-journey-of-a-
thousand-bytecodes

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Resources
• http://phpdbg.com/
• http://windows.php.net/qa/
• http://qa.php.net/