Update to require PHP 7.1+

.github/workflows/ci.yml

@@ -19,11 +19,6 @@ jobs:
           - 7.3
           - 7.2
           - 7.1
-          - 7.0
-          - 5.6
-          - 5.5
-          - 5.4
-          - 5.3
     steps:
       - uses: actions/checkout@v4
       - uses: shivammathur/setup-php@v2
@@ -32,7 +27,7 @@ jobs:
           coverage: xdebug
           ini-file: development
           ini-values: disable_functions='' # do not disable PCNTL functions on PHP < 8.1
-          extensions: sockets, pcntl ${{ matrix.php >= 5.6 && ', event' || '' }} ${{ matrix.php >= 5.4 && ', ev' || '' }}
+          extensions: sockets, pcntl, event, ev
         env:
           fail-fast: true # fail step if any extension can not be installed
       - run: composer install
@@ -56,7 +51,6 @@ jobs:
           - 7.3
           - 7.2
           - 7.1
-          - 7.0
     steps:
       - uses: actions/checkout@v4
       - uses: shivammathur/setup-php@v2
@@ -65,7 +59,7 @@ jobs:
           coverage: xdebug
           ini-file: development
           extensions: sockets, pcntl
-      - name: Install ext-uv on PHP 7+
+      - name: Install ext-uv
         run: |
           sudo apt-get update -q && sudo apt-get install libuv1-dev
           echo "yes" | sudo pecl install ${{ matrix.php >= 8.0 && 'uv-0.3.0' || 'uv-0.2.4' }}
@@ -104,19 +98,3 @@ jobs:
         if: ${{ matrix.php >= 7.3 }}
       - run: vendor/bin/phpunit --coverage-text -c phpunit.xml.legacy
         if: ${{ matrix.php < 7.3 }}
-
-  PHPUnit-hhvm:
-    name: PHPUnit (HHVM)
-    runs-on: ubuntu-22.04
-    continue-on-error: true
-    steps:
-      - uses: actions/checkout@v4
-      - run: cp "$(which composer)" composer.phar && ./composer.phar self-update --2.2 # downgrade Composer for HHVM
-      - name: Run hhvm composer.phar install
-        uses: docker://hhvm/hhvm:3.30-lts-latest
-        with:
-          args: hhvm composer.phar install
-      - name: Run hhvm vendor/bin/phpunit
-        uses: docker://hhvm/hhvm:3.30-lts-latest
-        with:
-          args: hhvm vendor/bin/phpunit

README.md

@@ -330,7 +330,7 @@ A `stream_select()` based event loop.
 This uses the [`stream_select()`](https://www.php.net/manual/en/function.stream-select.php)
 function and is the only implementation that works out of the box with PHP.
 
-This event loop works out of the box on PHP 5.3 through PHP 8+ and HHVM.
+This event loop works out of the box on any PHP version.
 This means that no installation is required and this library works on all
 platforms and supported PHP versions.
 Accordingly, the [`Loop` class](#loop) will use this event loop by default if
@@ -373,7 +373,7 @@ This uses the [`event` PECL extension](https://pecl.php.net/package/event),
 that provides an interface to `libevent` library.
 `libevent` itself supports a number of system-specific backends (epoll, kqueue).
 
-This loop is known to work with PHP 5.4 through PHP 8+.
+This loop is known to work with PHP 7.1 through PHP 8+.
 
 #### ExtEvLoop
 
@@ -384,7 +384,7 @@ that provides an interface to `libev` library.
 `libev` itself supports a number of system-specific backends (epoll, kqueue).
 
 
-This loop is known to work with PHP 5.4 through PHP 8+.
+This loop is known to work with PHP 7.1 through PHP 8+.
 
 #### ExtUvLoop
 
@@ -394,7 +394,7 @@ This loop uses the [`uv` PECL extension](https://pecl.php.net/package/uv),
 that provides an interface to `libuv` library.
 `libuv` itself supports a number of system-specific backends (epoll, kqueue).
 
-This loop is known to work with PHP 7+.
+This loop is known to work with PHP 7.1 through PHP 8+.
 
 ### LoopInterface
 
@@ -830,8 +830,7 @@ composer require react/event-loop:^3@dev
 See also the [CHANGELOG](CHANGELOG.md) for details about version upgrades.
 
 This project aims to run on any platform and thus does not require any PHP
-extensions and supports running on legacy PHP 5.3 through current PHP 8+ and
-HHVM.
+extensions and supports running on PHP 7.1 through current PHP 8+.
 It's *highly recommended to use the latest supported PHP version* for this project.
 
 Installing any of the event loop extensions is suggested, but entirely optional.

composer.json

@@ -26,10 +26,10 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0"
+        "php": ">=7.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6 || ^5.7 || ^4.8.36"
+        "phpunit/phpunit": "^9.6 || ^7.5"
     },
     "suggest": {
         "ext-pcntl": "For signal handling support when using the StreamSelectLoop"

examples/12-generate-yes.php

@@ -5,7 +5,7 @@
 require __DIR__ . '/../vendor/autoload.php';
 
 // data can be given as first argument or defaults to "y"
-$data = (isset($argv[1]) ? $argv[1] : 'y') . "\n";
+$data = ($argv[1] ?? 'y') . "\n";
 
 // repeat data X times in order to fill around 200 KB
 $data = str_repeat($data, round(200000 / strlen($data)));

examples/91-benchmark-ticks.php

@@ -4,7 +4,7 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-$n = isset($argv[1]) ? (int)$argv[1] : 1000 * 100;
+$n = (int) ($argv[1] ?? 1000 * 100);
 
 for ($i = 0; $i < $n; ++$i) {
     Loop::futureTick(function () { });

examples/92-benchmark-timers.php

@@ -4,7 +4,7 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-$n = isset($argv[1]) ? (int)$argv[1] : 1000 * 100;
+$n = (int) ($argv[1] ?? 1000 * 100);
 
 for ($i = 0; $i < $n; ++$i) {
     Loop::addTimer(0, function () { });

examples/93-benchmark-ticks-delay.php

@@ -4,7 +4,7 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-$ticks = isset($argv[1]) ? (int)$argv[1] : 1000 * 100;
+$ticks = (int) ($argv[1] ?? 1000 * 100);
 $tick = function () use (&$tick, &$ticks) {
     if ($ticks > 0) {
         --$ticks;

examples/94-benchmark-timers-delay.php

@@ -4,7 +4,7 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-$ticks = isset($argv[1]) ? (int)$argv[1] : 1000 * 100;
+$ticks = (int) ($argv[1] ?? 1000 * 100);
 $tick = function () use (&$tick, &$ticks) {
     if ($ticks > 0) {
         --$ticks;

examples/95-benchmark-memory.php

@@ -14,14 +14,14 @@
 require __DIR__ . '/../vendor/autoload.php';
 
 $args = getopt('t:l:r:');
-$t  = isset($args['t']) ? (int)$args['t'] : 0;
+$t  = (int) ($args['t'] ?? 0);
 $loop = isset($args['l']) && class_exists('React\EventLoop\\' . $args['l'] . 'Loop') ? 'React\EventLoop\\' . $args['l'] . 'Loop' : Loop::get();
 
 if (!($loop instanceof LoopInterface)) {
     Loop::set(new $loop());
 }
 
-$r = isset($args['r']) ? (int)$args['r'] : 2;
+$r = (int) ($args['r'] ?? 2);
 
 $runs = 0;
 

phpunit.xml.legacy

@@ -2,7 +2,7 @@
 
 <!-- PHPUnit configuration file with old format for legacy PHPUnit -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/4.8/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/7.5/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          colors="true">
     <testsuites>

src/ExtEvLoop.php

@@ -16,7 +16,7 @@
  * that provides an interface to `libev` library.
  * `libev` itself supports a number of system-specific backends (epoll, kqueue).
  *
- * This loop is known to work with PHP 5.4 through PHP 8+.
+ * This loop is known to work with PHP 7.1 through PHP 8+.
  *
  * @see http://php.net/manual/en/book.ev.php
  * @see https://bitbucket.org/osmanov/pecl-ev/overview
@@ -41,12 +41,12 @@ class ExtEvLoop implements LoopInterface
     /**
      * @var EvIo[]
      */
-    private $readStreams = array();
+    private $readStreams = [];
 
     /**
      * @var EvIo[]
      */
-    private $writeStreams = array();
+    private $writeStreams = [];
 
     /**
      * @var bool
@@ -61,7 +61,7 @@ class ExtEvLoop implements LoopInterface
     /**
      * @var \EvSignal[]
      */
-    private $signalEvents = array();
+    private $signalEvents = [];
 
     public function __construct()
     {
@@ -138,13 +138,11 @@ public function addTimer($interval, $callback)
     {
         $timer = new Timer($interval, $callback, false);
 
-        $that = $this;
-        $timers = $this->timers;
-        $callback = function () use ($timer, $timers, $that) {
+        $callback = function () use ($timer) {
             \call_user_func($timer->getCallback(), $timer);
 
-            if ($timers->contains($timer)) {
-                $that->cancelTimer($timer);
+            if ($this->timers->contains($timer)) {
+                $this->cancelTimer($timer);
             }
         };
 

src/ExtEventLoop.php

@@ -16,7 +16,7 @@
  * that provides an interface to `libevent` library.
  * `libevent` itself supports a number of system-specific backends (epoll, kqueue).
  *
- * This loop is known to work with PHP 5.4 through PHP 8+.
+ * This loop is known to work with PHP 7.1 through PHP 8+.
  *
  * @link https://pecl.php.net/package/event
  */
@@ -27,15 +27,15 @@ final class ExtEventLoop implements LoopInterface
     private $timerCallback;
     private $timerEvents;
     private $streamCallback;
-    private $readEvents = array();
-    private $writeEvents = array();
-    private $readListeners = array();
-    private $writeListeners = array();
-    private $readRefs = array();
-    private $writeRefs = array();
+    private $readEvents = [];
+    private $writeEvents = [];
+    private $readListeners = [];
+    private $writeListeners = [];
+    private $readRefs = [];
+    private $writeRefs = [];
     private $running;
     private $signals;
-    private $signalEvents = array();
+    private $signalEvents = [];
 
     public function __construct()
     {
@@ -67,8 +67,8 @@ public function __destruct()
             $this->timerEvents->detach($timer);
         }
 
-        $this->readEvents = array();
-        $this->writeEvents = array();
+        $this->readEvents = [];
+        $this->writeEvents = [];
     }
 
     public function addReadStream($stream, $listener)
@@ -85,9 +85,7 @@ public function addReadStream($stream, $listener)
 
         // ext-event does not increase refcount on stream resources for PHP 7+
         // manually keep track of stream resource to prevent premature garbage collection
-        if (\PHP_VERSION_ID >= 70000) {
-            $this->readRefs[$key] = $stream;
-        }
+        $this->readRefs[$key] = $stream;
     }
 
     public function addWriteStream($stream, $listener)
@@ -104,9 +102,7 @@ public function addWriteStream($stream, $listener)
 
         // ext-event does not increase refcount on stream resources for PHP 7+
         // manually keep track of stream resource to prevent premature garbage collection
-        if (\PHP_VERSION_ID >= 70000) {
-            $this->writeRefs[$key] = $stream;
-        }
+        $this->writeRefs[$key] = $stream;
     }
 
     public function removeReadStream($stream)
@@ -173,7 +169,7 @@ public function addSignal($signal, $listener)
         $this->signals->add($signal, $listener);
 
         if (!isset($this->signalEvents[$signal])) {
-            $this->signalEvents[$signal] = Event::signal($this->eventBase, $signal, array($this->signals, 'call'));
+            $this->signalEvents[$signal] = Event::signal($this->eventBase, $signal, [$this->signals, 'call']);
             $this->signalEvents[$signal]->add();
         }
     }
@@ -239,11 +235,10 @@ private function scheduleTimer(TimerInterface $timer)
      */
     private function createTimerCallback()
     {
-        $timers = $this->timerEvents;
-        $this->timerCallback = function ($_, $__, $timer) use ($timers) {
+        $this->timerCallback = function ($_, $__, $timer) {
             \call_user_func($timer->getCallback(), $timer);
 
-            if (!$timer->isPeriodic() && $timers->contains($timer)) {
+            if (!$timer->isPeriodic() && $this->timerEvents->contains($timer)) {
                 $this->cancelTimer($timer);
             }
         };
@@ -258,17 +253,15 @@ private function createTimerCallback()
      */
     private function createStreamCallback()
     {
-        $read =& $this->readListeners;
-        $write =& $this->writeListeners;
-        $this->streamCallback = function ($stream, $flags) use (&$read, &$write) {
+        $this->streamCallback = function ($stream, $flags) {
             $key = (int) $stream;
 
-            if (Event::READ === (Event::READ & $flags) && isset($read[$key])) {
-                \call_user_func($read[$key], $stream);
+            if (Event::READ === (Event::READ & $flags) && isset($this->readListeners[$key])) {
+                \call_user_func($this->readListeners[$key], $stream);
             }
 
-            if (Event::WRITE === (Event::WRITE & $flags) && isset($write[$key])) {
-                \call_user_func($write[$key], $stream);
+            if (Event::WRITE === (Event::WRITE & $flags) && isset($this->writeListeners[$key])) {
+                \call_user_func($this->writeListeners[$key], $stream);
             }
         };
     }