Reverse String

php/reverse-string/.exercism/config.json

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+{
+  "blurb": "Reverse a string",
+  "authors": ["MichaelBunker"],
+  "contributors": [],
+  "files": {
+    "solution": ["ReverseString.php"],
+    "test": ["ReverseStringTest.php"],
+    "example": [".meta/example.php"]
+  }
+}

php/reverse-string/.exercism/metadata.json

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+{"track":"php","exercise":"reverse-string","id":"af5aa937e83b4c10940c1025f6c9c4b7","url":"https://exercism.org/tracks/php/exercises/reverse-string","handle":"JBiason","is_requester":true,"auto_approve":false}

php/reverse-string/HELP.md

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+# Help
+
+## Running the tests
+
+## Running the tests
+
+1. Go to the root of your PHP exercise directory, which is `<EXERCISM_WORKSPACE>/php`.
+   To find the Exercism workspace run
+
+       ➜ exercism debug | grep Workspace
+
+1. Get [PHPUnit] if you don't have it already.
+
+       ➜ wget -O phpunit https://phar.phpunit.de/phpunit-9.phar
+       ➜ chmod +x phpunit
+       ➜ ./phpunit --version
+
+2. Execute the tests:
+
+       ➜ ./phpunit file_to_test.php
+
+   For example, to run the tests for the Hello World exercise, you would run:
+
+       ➜ ./phpunit HelloWorldTest.php
+
+[PHPUnit]: http://phpunit.de
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit ReverseString.php` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [PHP track's documentation](https://exercism.org/docs/tracks/php)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+ - [/r/php](https://www.reddit.com/r/php) is the PHP subreddit.
+ - [StackOverflow](https://stackoverflow.com/questions/tagged/php) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.

php/reverse-string/README.md

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+# Reverse String
+
+Welcome to Reverse String on Exercism's PHP Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Reverse a string
+
+For example:
+input: "cool"
+output: "looc"
+
+## Source
+
+### Created by
+
+- @MichaelBunker

php/reverse-string/ReverseString.php

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+<?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);
+
+function reverseString(string $text): string
+{
+    $result = '';
+    for ($i = strlen($text) - 1; $i >= 0; --$i) {
+        $result .= $text[$i];
+    }
+    return $result;
+}

php/reverse-string/ReverseStringTest.php

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+<?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 ReverseStringTest extends PHPUnit\Framework\TestCase
+{
+    public static function setUpBeforeClass(): void
+    {
+        require_once 'ReverseString.php';
+    }
+
+    public function testEmptyString(): void
+    {
+        $this->assertEquals("", reverseString(""));
+    }
+
+    public function testWord(): void
+    {
+        $this->assertEquals("tobor", reverseString("robot"));
+    }
+
+    public function testCapitalizedWord(): void
+    {
+        $this->assertEquals("nemaR", reverseString("Ramen"));
+    }
+
+    public function testSentenceWithPunctuation(): void
+    {
+        $this->assertEquals("!yrgnuh m'I", reverseString("I'm hungry!"));
+    }
+
+    public function testPalindrome(): void
+    {
+        $this->assertEquals("racecar", reverseString("racecar"));
+    }
+
+    public function testEvenSizedWord(): void
+    {
+        $this->assertEquals("reward", reverseString("drawer"));
+    }
+}