DOC-5678 PHP cuckoo filter examples

Author: andy-stark-redis

local_examples/php/DtCuckooTest.php

@@ -0,0 +1,55 @@
+// EXAMPLE: cuckoo_tutorial
+<?php
+
+require 'vendor/autoload.php';
+
+use Predis\Client as PredisClient;
+
+class DtCuckooTest
+// REMOVE_START
+extends PredisTestCase
+// REMOVE_END
+{
+    public function testDtCuckoo() {
+        $r = new PredisClient([
+            'scheme'   => 'tcp',
+            'host'     => '127.0.0.1',
+            'port'     => 6379,
+            'password' => '',
+            'database' => 0,
+        ]);
+        // REMOVE_START
+        $r->flushall();
+        // REMOVE_END
+
+        // STEP_START cuckoo
+        $res1 = $r->cfreserve('bikes:models', 1000000);
+        echo $res1 . PHP_EOL;
+        // >>> OK
+
+        $res2 = $r->cfadd('bikes:models', 'Smoky Mountain Striker');
+        echo $res2 . PHP_EOL;
+        // >>> 1
+
+        $res3 = $r->cfexists('bikes:models', 'Smoky Mountain Striker');
+        echo $res3 . PHP_EOL;
+        // >>> 1
+
+        $res4 = $r->cfexists('bikes:models', 'Terrible Bike Name');
+        echo $res4 . PHP_EOL;
+        // >>> 0
+
+        $res5 = $r->cfdel('bikes:models', 'Smoky Mountain Striker');
+        echo $res5 . PHP_EOL;
+        // >>> 1
+        // STEP_END
+        // REMOVE_START
+        $this->assertEquals('OK', $res1);
+        $this->assertEquals(1, $res2);
+        $this->assertEquals(1, $res3);
+        $this->assertEquals(0, $res4);
+        $this->assertEquals(1, $res5);
+        // REMOVE_END
+    }
+}
+