From 4f34d7ef90c82af2091c28118fb519481b4ecea9 Mon Sep 17 00:00:00 2001
From: Tomas Norre Mikkelsen <tomasnorre@gmail.com>
Date: Fri, 23 Feb 2024 17:45:22 +0100
Subject: [PATCH 1/4] Add Food Chain Exercise

---
 config.json                                   |   8 +
 .../practice/food-chain/.docs/instructions.md |  64 +++++
 .../practice/food-chain/.meta/config.json     |  17 ++
 .../practice/food-chain/.meta/example.php     |  62 +++++
 .../practice/food-chain/.meta/tests.toml      |  40 ++++
 exercises/practice/food-chain/FoodChain.php   |  43 ++++
 .../practice/food-chain/FoodChainTest.php     | 225 ++++++++++++++++++
 7 files changed, 459 insertions(+)
 create mode 100644 exercises/practice/food-chain/.docs/instructions.md
 create mode 100644 exercises/practice/food-chain/.meta/config.json
 create mode 100644 exercises/practice/food-chain/.meta/example.php
 create mode 100644 exercises/practice/food-chain/.meta/tests.toml
 create mode 100644 exercises/practice/food-chain/FoodChain.php
 create mode 100644 exercises/practice/food-chain/FoodChainTest.php

diff --git a/config.json b/config.json
index 9bd0ab9b..f0369b48 100644
--- a/config.json
+++ b/config.json
@@ -1188,6 +1188,14 @@
         "prerequisites": [],
         "difficulty": 6
       },
+      {
+        "slug": "food-chain",
+        "name": "Food Chain",
+        "uuid": "9fa82e62-1dd3-45c4-ae33-6c854a7b92b5",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "slug": "kindergarten-garden",
         "name": "Kindergarten Garden",
diff --git a/exercises/practice/food-chain/.docs/instructions.md b/exercises/practice/food-chain/.docs/instructions.md
new file mode 100644
index 00000000..125820e3
--- /dev/null
+++ b/exercises/practice/food-chain/.docs/instructions.md
@@ -0,0 +1,64 @@
+# Instructions
+
+Generate the lyrics of the song 'I Know an Old Lady Who Swallowed a Fly'.
+
+While you could copy/paste the lyrics, or read them from a file, this problem is much more interesting if you approach it algorithmically.
+
+This is a [cumulative song][cumulative-song] of unknown origin.
+
+This is one of many common variants.
+
+```text
+I know an old lady who swallowed a fly.
+I don't know why she swallowed the fly. Perhaps she'll die.
+
+I know an old lady who swallowed a spider.
+It wriggled and jiggled and tickled inside her.
+She swallowed the spider to catch the fly.
+I don't know why she swallowed the fly. Perhaps she'll die.
+
+I know an old lady who swallowed a bird.
+How absurd to swallow a bird!
+She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.
+She swallowed the spider to catch the fly.
+I don't know why she swallowed the fly. Perhaps she'll die.
+
+I know an old lady who swallowed a cat.
+Imagine that, to swallow a cat!
+She swallowed the cat to catch the bird.
+She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.
+She swallowed the spider to catch the fly.
+I don't know why she swallowed the fly. Perhaps she'll die.
+
+I know an old lady who swallowed a dog.
+What a hog, to swallow a dog!
+She swallowed the dog to catch the cat.
+She swallowed the cat to catch the bird.
+She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.
+She swallowed the spider to catch the fly.
+I don't know why she swallowed the fly. Perhaps she'll die.
+
+I know an old lady who swallowed a goat.
+Just opened her throat and swallowed a goat!
+She swallowed the goat to catch the dog.
+She swallowed the dog to catch the cat.
+She swallowed the cat to catch the bird.
+She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.
+She swallowed the spider to catch the fly.
+I don't know why she swallowed the fly. Perhaps she'll die.
+
+I know an old lady who swallowed a cow.
+I don't know how she swallowed a cow!
+She swallowed the cow to catch the goat.
+She swallowed the goat to catch the dog.
+She swallowed the dog to catch the cat.
+She swallowed the cat to catch the bird.
+She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.
+She swallowed the spider to catch the fly.
+I don't know why she swallowed the fly. Perhaps she'll die.
+
+I know an old lady who swallowed a horse.
+She's dead, of course!
+```
+
+[cumulative-song]: https://en.wikipedia.org/wiki/Cumulative_song
diff --git a/exercises/practice/food-chain/.meta/config.json b/exercises/practice/food-chain/.meta/config.json
new file mode 100644
index 00000000..804fae1d
--- /dev/null
+++ b/exercises/practice/food-chain/.meta/config.json
@@ -0,0 +1,17 @@
+{
+  "authors": [],
+  "files": {
+    "solution": [
+      "FoodChain.php"
+    ],
+    "test": [
+      "FoodChainTest.php"
+    ],
+    "example": [
+      ".meta/example.php"
+    ]
+  },
+  "blurb": "Generate the lyrics of the song 'I Know an Old Lady Who Swallowed a Fly'.",
+  "source": "Wikipedia",
+  "source_url": "https://en.wikipedia.org/wiki/There_Was_an_Old_Lady_Who_Swallowed_a_Fly"
+}
diff --git a/exercises/practice/food-chain/.meta/example.php b/exercises/practice/food-chain/.meta/example.php
new file mode 100644
index 00000000..2be2fbcd
--- /dev/null
+++ b/exercises/practice/food-chain/.meta/example.php
@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+class FoodChain
+{
+    private static array $verse = [
+        ["", ""],
+        ["fly", "I don't know why she swallowed the fly. Perhaps she'll die."],
+        ["spider", "It wriggled and jiggled and tickled inside her."],
+        ["bird", "How absurd to swallow a bird!"],
+        ["cat", "Imagine that, to swallow a cat!"],
+        ["dog", "What a hog, to swallow a dog!"],
+        ["goat", "Just opened her throat and swallowed a goat!"],
+        ["cow", "I don't know how she swallowed a cow!"],
+        ["horse", "She's dead, of course!"],
+    ];
+
+    public static function verse(int $verseNumber): array
+    {
+        $result = [];
+
+        $result[] = sprintf("I know an old lady who swallowed a %s.", self::$verse[$verseNumber][0]);
+        $result[] = self::$verse[$verseNumber][1];
+        if ($verseNumber === 1 || $verseNumber === 8) {
+            return $result;
+        }
+        for (; $verseNumber > 1; $verseNumber--) {
+            $text = sprintf(
+                "She swallowed the %s to catch the %s%s",
+                self::$verse[$verseNumber][0],
+                self::$verse[$verseNumber - 1][0],
+                $verseNumber !== 3 ? "." : ""
+            );
+            if ($verseNumber === 3) {
+                $text .= " that wriggled and jiggled and tickled inside her.";
+            }
+            $result[] = $text;
+        }
+        $result[] = self::$verse[$verseNumber][1];
+        return $result;
+    }
+
+    public static function verses(int $start, int $end): array
+    {
+        if ($start < 1 || $start > $end || $end > 8) {
+            return self::verse(0);
+        }
+        $s = self::verse($start);
+        while ($start < $end) {
+            $start++;
+            $s[] = "";
+            $s = array_merge($s, self::verse($start));
+        }
+        return $s;
+    }
+
+    public static function song(): array
+    {
+        return self::verses(1, 8);
+    }
+}
diff --git a/exercises/practice/food-chain/.meta/tests.toml b/exercises/practice/food-chain/.meta/tests.toml
new file mode 100644
index 00000000..30c5b980
--- /dev/null
+++ b/exercises/practice/food-chain/.meta/tests.toml
@@ -0,0 +1,40 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[751dce68-9412-496e-b6e8-855998c56166]
+description = "fly"
+
+[6c56f861-0c5e-4907-9a9d-b2efae389379]
+description = "spider"
+
+[3edf5f33-bef1-4e39-ae67-ca5eb79203fa]
+description = "bird"
+
+[e866a758-e1ff-400e-9f35-f27f28cc288f]
+description = "cat"
+
+[3f02c30e-496b-4b2a-8491-bc7e2953cafb]
+description = "dog"
+
+[4b3fd221-01ea-46e0-825b-5734634fbc59]
+description = "goat"
+
+[1b707da9-7001-4fac-941f-22ad9c7a65d4]
+description = "cow"
+
+[3cb10d46-ae4e-4d2c-9296-83c9ffc04cdc]
+description = "horse"
+
+[22b863d5-17e4-4d1e-93e4-617329a5c050]
+description = "multiple verses"
+
+[e626b32b-745c-4101-bcbd-3b13456893db]
+description = "full song"
diff --git a/exercises/practice/food-chain/FoodChain.php b/exercises/practice/food-chain/FoodChain.php
new file mode 100644
index 00000000..45345cfe
--- /dev/null
+++ b/exercises/practice/food-chain/FoodChain.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * By adding type hints and enabling strict type checking, code can become
+ * easier to read, self-documenting and reduce the number of potential bugs.
+ * By default, type declarations are non-strict, which means they will attempt
+ * to change the original type to match the type specified by the
+ * type-declaration.
+ *
+ * In other words, if you pass a string to a function requiring a float,
+ * it will attempt to convert the string value to a float.
+ *
+ * To enable strict mode, a single declare directive must be placed at the top
+ * of the file.
+ * This means that the strictness of typing is configured on a per-file basis.
+ * This directive not only affects the type declarations of parameters, but also
+ * a function's return type.
+ *
+ * For more info review the Concept on strict type checking in the PHP track
+ * <link>.
+ *
+ * To disable strict typing, comment out the directive below.
+ */
+
+declare(strict_types=1);
+
+class FoodChain
+{
+    public static function verse(int $verseNumber): array
+    {
+        throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
+    }
+
+    public static function verses(int $start, int $end): array
+    {
+        throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
+    }
+
+    public static function song(): array
+    {
+        throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
+    }
+}
diff --git a/exercises/practice/food-chain/FoodChainTest.php b/exercises/practice/food-chain/FoodChainTest.php
new file mode 100644
index 00000000..38de7dba
--- /dev/null
+++ b/exercises/practice/food-chain/FoodChainTest.php
@@ -0,0 +1,225 @@
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+class FoodChainTest extends TestCase
+{
+    private FoodChain $foodChain;
+
+    public static function setUpBeforeClass(): void
+    {
+        require_once 'FoodChain.php';
+    }
+
+    protected function setUp(): void
+    {
+        $this->foodChain = new FoodChain();
+    }
+
+    /**
+     * uuid: 751dce68-9412-496e-b6e8-855998c56166
+     */
+    public function testFly(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(1));
+    }
+
+    /**
+     * uuid: 6c56f861-0c5e-4907-9a9d-b2efae389379
+     */
+    public function testSpider(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a spider.",
+            "It wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(2));
+    }
+
+    /**
+     * uuid: 3edf5f33-bef1-4e39-ae67-ca5eb79203fa
+     */
+    public function testBird(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a bird.",
+            "How absurd to swallow a bird!",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(3));
+    }
+
+    /**
+     * uuid: e866a758-e1ff-400e-9f35-f27f28cc288f
+     */
+    public function testCat(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a cat.",
+            "Imagine that, to swallow a cat!",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(4));
+    }
+
+    /**
+     * uuid: 3f02c30e-496b-4b2a-8491-bc7e2953cafb
+     */
+    public function testDog(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a dog.",
+            "What a hog, to swallow a dog!",
+            "She swallowed the dog to catch the cat.",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(5));
+    }
+
+    /**
+     * uuid: 4b3fd221-01ea-46e0-825b-5734634fbc59
+     */
+    public function testGoat(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a goat.",
+            "Just opened her throat and swallowed a goat!",
+            "She swallowed the goat to catch the dog.",
+            "She swallowed the dog to catch the cat.",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(6));
+    }
+
+    /**
+     * uuid: 1b707da9-7001-4fac-941f-22ad9c7a65d4
+     */
+    public function testCow(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a cow.",
+            "I don't know how she swallowed a cow!",
+            "She swallowed the cow to catch the goat.",
+            "She swallowed the goat to catch the dog.",
+            "She swallowed the dog to catch the cat.",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(7));
+    }
+
+    /**
+     * uuid: 3cb10d46-ae4e-4d2c-9296-83c9ffc04cdc
+     */
+    public function testHorse(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a horse.",
+            "She's dead, of course!"
+        ];
+        $this->assertEquals($expected, $this->foodChain->verse(8));
+    }
+
+    /**
+     * uuid: 22b863d5-17e4-4d1e-93e4-617329a5c050
+     */
+    public function testMultipleVerses(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a spider.",
+            "It wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a bird.",
+            "How absurd to swallow a bird!",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die."
+        ];
+        $this->assertEquals($expected, $this->foodChain->verses(1, 3));
+    }
+    /**
+     * uuid: e626b32b-745c-4101-bcbd-3b13456893db
+     */
+    public function testFullSong(): void
+    {
+        $expected = [
+            "I know an old lady who swallowed a fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a spider.",
+            "It wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a bird.",
+            "How absurd to swallow a bird!",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a cat.",
+            "Imagine that, to swallow a cat!",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a dog.",
+            "What a hog, to swallow a dog!",
+            "She swallowed the dog to catch the cat.",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a goat.",
+            "Just opened her throat and swallowed a goat!",
+            "She swallowed the goat to catch the dog.",
+            "She swallowed the dog to catch the cat.",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a cow.",
+            "I don't know how she swallowed a cow!",
+            "She swallowed the cow to catch the goat.",
+            "She swallowed the goat to catch the dog.",
+            "She swallowed the dog to catch the cat.",
+            "She swallowed the cat to catch the bird.",
+            "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.",
+            "She swallowed the spider to catch the fly.",
+            "I don't know why she swallowed the fly. Perhaps she'll die.",
+            "",
+            "I know an old lady who swallowed a horse.",
+            "She's dead, of course!"
+        ];
+        $this->assertEquals($expected, $this->foodChain->song());
+    }
+}

From d40d80ea6f96b3b2bfa7f95cd4b057f5f5ceea6d Mon Sep 17 00:00:00 2001
From: Tomas Norre Mikkelsen <tomasnorre@gmail.com>
Date: Fri, 23 Feb 2024 17:48:06 +0100
Subject: [PATCH 2/4] Add author to config.json

---
 exercises/practice/food-chain/.meta/config.json | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/exercises/practice/food-chain/.meta/config.json b/exercises/practice/food-chain/.meta/config.json
index 804fae1d..a740eb34 100644
--- a/exercises/practice/food-chain/.meta/config.json
+++ b/exercises/practice/food-chain/.meta/config.json
@@ -1,5 +1,7 @@
 {
-  "authors": [],
+  "authors": [
+    "tomasnorre"
+  ],
   "files": {
     "solution": [
       "FoodChain.php"

From 32c7f62f3f801e2714e8d1b34e20036d40b1bb4b Mon Sep 17 00:00:00 2001
From: Tomas Norre Mikkelsen <tomasnorre@gmail.com>
Date: Fri, 23 Feb 2024 19:05:58 +0100
Subject: [PATCH 3/4] Update after iteration 1

---
 .../practice/food-chain/.meta/example.php     | 24 +++++++++----------
 exercises/practice/food-chain/FoodChain.php   |  6 ++---
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/exercises/practice/food-chain/.meta/example.php b/exercises/practice/food-chain/.meta/example.php
index 2be2fbcd..dd39ba58 100644
--- a/exercises/practice/food-chain/.meta/example.php
+++ b/exercises/practice/food-chain/.meta/example.php
@@ -4,7 +4,7 @@
 
 class FoodChain
 {
-    private static array $verse = [
+    private const VERSE = [
         ["", ""],
         ["fly", "I don't know why she swallowed the fly. Perhaps she'll die."],
         ["spider", "It wriggled and jiggled and tickled inside her."],
@@ -16,20 +16,20 @@ class FoodChain
         ["horse", "She's dead, of course!"],
     ];
 
-    public static function verse(int $verseNumber): array
+    public function verse(int $verseNumber): array
     {
         $result = [];
 
-        $result[] = sprintf("I know an old lady who swallowed a %s.", self::$verse[$verseNumber][0]);
-        $result[] = self::$verse[$verseNumber][1];
+        $result[] = sprintf("I know an old lady who swallowed a %s.", self::VERSE[$verseNumber][0]);
+        $result[] = self::VERSE[$verseNumber][1];
         if ($verseNumber === 1 || $verseNumber === 8) {
             return $result;
         }
         for (; $verseNumber > 1; $verseNumber--) {
             $text = sprintf(
                 "She swallowed the %s to catch the %s%s",
-                self::$verse[$verseNumber][0],
-                self::$verse[$verseNumber - 1][0],
+                self::VERSE[$verseNumber][0],
+                self::VERSE[$verseNumber - 1][0],
                 $verseNumber !== 3 ? "." : ""
             );
             if ($verseNumber === 3) {
@@ -37,26 +37,26 @@ public static function verse(int $verseNumber): array
             }
             $result[] = $text;
         }
-        $result[] = self::$verse[$verseNumber][1];
+        $result[] = self::VERSE[$verseNumber][1];
         return $result;
     }
 
-    public static function verses(int $start, int $end): array
+    public function verses(int $start, int $end): array
     {
         if ($start < 1 || $start > $end || $end > 8) {
-            return self::verse(0);
+            return $this->verse(0);
         }
         $s = self::verse($start);
         while ($start < $end) {
             $start++;
             $s[] = "";
-            $s = array_merge($s, self::verse($start));
+            $s = array_merge($s, $this->verse($start));
         }
         return $s;
     }
 
-    public static function song(): array
+    public function song(): array
     {
-        return self::verses(1, 8);
+        return $this->verses(1, 8);
     }
 }
diff --git a/exercises/practice/food-chain/FoodChain.php b/exercises/practice/food-chain/FoodChain.php
index 45345cfe..8cd60bae 100644
--- a/exercises/practice/food-chain/FoodChain.php
+++ b/exercises/practice/food-chain/FoodChain.php
@@ -26,17 +26,17 @@
 
 class FoodChain
 {
-    public static function verse(int $verseNumber): array
+    public function verse(int $verseNumber): array
     {
         throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
     }
 
-    public static function verses(int $start, int $end): array
+    public function verses(int $start, int $end): array
     {
         throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
     }
 
-    public static function song(): array
+    public function song(): array
     {
         throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
     }

From 15623fc9a0c233bc733146137fa0efb196e6c92b Mon Sep 17 00:00:00 2001
From: Tomas Norre Mikkelsen <tomasnorre@gmail.com>
Date: Fri, 23 Feb 2024 20:04:53 +0100
Subject: [PATCH 4/4] Update after iteration 2

---
 exercises/practice/food-chain/.meta/example.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/exercises/practice/food-chain/.meta/example.php b/exercises/practice/food-chain/.meta/example.php
index dd39ba58..ecace289 100644
--- a/exercises/practice/food-chain/.meta/example.php
+++ b/exercises/practice/food-chain/.meta/example.php
@@ -44,9 +44,9 @@ public function verse(int $verseNumber): array
     public function verses(int $start, int $end): array
     {
         if ($start < 1 || $start > $end || $end > 8) {
-            return $this->verse(0);
+            return $this->verse(1);
         }
-        $s = self::verse($start);
+        $s = $this->verse($start);
         while ($start < $end) {
             $start++;
             $s[] = "";