Added examples

Author: dantleech

example/hash_algos.php

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+<?php
+
+require __DIR__ . '/../vendor/autoload.php';
+
+use PhpBench\Pipeline\Core\PipelineBuilder;
+
+$builder = PipelineBuilder::createWithDefaults()
+    ->stage('parameter/serial', [
+        'name' => 'algo',
+        'values' => array_slice(hash_algos(), 0, 3),
+    ])
+    ->stage('sampler/callable', [
+        'callable' => function ($data) { hash($data['algo'], 'Hello World'); },
+        'iterations' => 100,
+    ])
+    ->stage('aggregator/describe', [ 'group_by' => 'algo', 'describe' => 'time' ])
+    ->stage('encoder/json', [ 'pretty' => true ])
+    ->stage('console/redraw')
+    ->stage('output/stream')
+
+    ->run();

example/http_sampler.php

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+<?php
+
+require __DIR__ . '/../vendor/autoload.php';
+
+use PhpBench\Pipeline\Core\PipelineBuilder;
+
+$builder = PipelineBuilder::createWithDefaults();
+$builder->load([
+    [ 'parameter/serial', [ 'name' => 'url', 'values' => [
+        'https://localhost',
+        'https://www.bbc.co.uk',
+    ]]],
+    [ 'valve/delay', [ 'time' => 10 ] ],
+    [ 'sampler/curl', [ 'url' => '%url%', 'concurrency' => 10, 'async' => false ] ],
+    [ 'filter/keys', [ 'keys' => [ 'url', 'total_time', 'connect_time', 'concurrency']]],
+    [ 'aggregator/collector', ['limit' => 2] ],
+    [ 'encoder/json', [ 'pretty' => true ] ],
+    'console/redraw',
+    'output/stream',
+    [ 'valve/timeout', [ 'time' => 10E6 ]],
+]);
+$builder->run();