diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..57872d0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/vendor/
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..1616146
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,11 @@
+image:          php:7.1-alpine
+
+before_script:
+- apk update
+- apk add git
+- curl -sS https://getcomposer.org/installer | php
+- php composer.phar install
+
+test:
+  script:
+    - php composer.phar test
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..3da09cc
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,33 @@
+{
+    "name": "byjoby/html-object-strings",
+    "description": "Abstraction layer for constructing arbitrary HTML tags in PHP",
+    "type": "library",
+    "require": {
+        "byjoby/flatrr": "dev-master"
+    },
+    "license": "MIT",
+    "authors": [{
+        "name": "Joby Elliott",
+        "email": "joby@byjoby.com"
+    }],
+    "minimum-stability": "dev",
+    "autoload": {
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+            "HtmlObjectStrings\\": "src/"
+        }
+    },
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+        }
+    },
+    "scripts": {
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+        ]
+    },
+    "require-dev": {
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+        "stevegrunwell/phpunit-markup-assertions": "dev-master"
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..7678cb1
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1675 @@
+{
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+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "b2508279ab417c5d5d7dfb801b58a43f",
+    "packages": [
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+            "version": "dev-master",
+            "source": {
+                "type": "git",
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+                "reference": "b30f15521f6f98d4ff87711a09a22fc2c3e4b349"
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+                "php": ">=5.3.3"
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+            },
+            "autoload": {
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+                    "src/"
+                ]
+            },
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+            "license": [
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+            ],
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+                    "email": "sebastian@phpunit.de"
+                }
+            ],
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+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "time": "2018-05-15T05:52:18+00:00"
+        },
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+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "7707193304715e3caddf28fc73c02c12ed6f350c"
+            },
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+                "reference": "7707193304715e3caddf28fc73c02c12ed6f350c",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
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+                }
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+                    "src/"
+                ]
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+                "BSD-3-Clause"
+            ],
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+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "time": "2018-05-15T05:50:44+00:00"
+        },
+        {
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+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "dbe1869c13935c6080c834fc61424834b9ad5907"
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+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
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+                "phpunit/phpunit": "^6.0"
+            },
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+                "branch-alias": {
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+                }
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+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
+            "time": "2018-05-15T05:52:05+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "0f9911fea026d9737c9b357ddda0916ea3beaf1d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/0f9911fea026d9737c9b357ddda0916ea3beaf1d",
+                "reference": "0f9911fea026d9737c9b357ddda0916ea3beaf1d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6.0"
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+                }
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+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2018-05-15T05:53:02+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "stevegrunwell/phpunit-markup-assertions",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/stevegrunwell/phpunit-markup-assertions.git",
+                "reference": "41d5064c2e259070666978ed902d76091059935d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/stevegrunwell/phpunit-markup-assertions/zipball/41d5064c2e259070666978ed902d76091059935d",
+                "reference": "41d5064c2e259070666978ed902d76091059935d",
+                "shasum": ""
+            },
+            "require": {
+                "zendframework/zend-dom": "^2.7"
+            },
+            "require-dev": {
+                "phpunit/phpunit": ">=6.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "SteveGrunwell\\PHPUnit_Markup_Assertions\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Steve Grunwell",
+                    "homepage": "https://stevegrunwell.com"
+                }
+            ],
+            "description": "Assertions for PHPUnit to verify the presence or state of elements within markup",
+            "keywords": [
+                "dom",
+                "markup",
+                "phpunit",
+                "testing"
+            ],
+            "time": "2018-03-27T21:20:31+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07T12:08:54+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "53927dddf3afa2088b355188e143bba42159bf5d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/53927dddf3afa2088b355188e143bba42159bf5d",
+                "reference": "53927dddf3afa2088b355188e143bba42159bf5d",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2018-05-29T14:25:02+00:00"
+        },
+        {
+            "name": "zendframework/zend-dom",
+            "version": "dev-develop",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/zendframework/zend-dom.git",
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+            },
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+                "type": "zip",
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+                "reference": "cf65074fbf1464869493f9d69130b29844a90239",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.6 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^5.7.23 || ^6.4.3",
+                "zendframework/zend-coding-standard": "~1.0.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7.x-dev",
+                    "dev-develop": "2.8.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Zend\\Dom\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "description": "provides tools for working with DOM documents and structures",
+            "keywords": [
+                "ZendFramework",
+                "dom",
+                "zf"
+            ],
+            "time": "2018-04-09T20:24:15+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "dev",
+    "stability-flags": {
+        "byjoby/flatrr": 20,
+        "phpunit/phpunit": 20,
+        "stevegrunwell/phpunit-markup-assertions": 20
+    },
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": []
+}
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..a671214
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,7 @@
+<phpunit>
+  <testsuites>
+    <testsuite name="All Tests">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>
diff --git a/src/A.php b/src/A.php
new file mode 100644
index 0000000..51f7e5b
--- /dev/null
+++ b/src/A.php
@@ -0,0 +1,9 @@
+<?php
+/* HTML Object Strings | https://gitlab.com/byjoby/html-object-strings | MIT License */
+namespace HtmlObjectStrings;
+
+class A extends GenericTag
+{
+    const TAG = 'a';
+    const SELFCLOSING = false;
+}
diff --git a/src/GenericTag.php b/src/GenericTag.php
new file mode 100644
index 0000000..b5978e4
--- /dev/null
+++ b/src/GenericTag.php
@@ -0,0 +1,136 @@
+<?php
+/* HTML Object Strings | https://gitlab.com/byjoby/html-object-strings | MIT License */
+namespace HtmlObjectStrings;
+
+use Flatrr\FlatArray;
+
+class GenericTag extends FlatArray implements HtmlInterface
+{
+    const TAG = 'span';
+    const SELFCLOSING = false;
+
+    public function __construct(array $data = null)
+    {
+        parent::__construct($data);
+        $this->merge([
+            'classes' => [],
+            'attributes' => []
+        ]);
+        $this->htmlInit();
+    }
+
+    protected function htmlContent()
+    {
+        if (is_array($this['content'])) {
+            $content = implode(PHP_EOL, $this['content']);
+        } else {
+            $content = $this['content'];
+        }
+        return $content;
+    }
+
+    protected function htmlAttributes()
+    {
+        $attr = $this['attributes'];
+        if ($this->classes()) {
+            $attr['class'] = implode(' ', $this->classes());
+        }
+        return $attr;
+    }
+
+    protected function htmlInit()
+    {
+        $this['tag'] = static::TAG;
+        $this['selfclosing'] = static::SELFCLOSING;
+    }
+
+    public function addClass(string $name)
+    {
+        if (!$name) {
+            return;
+        }
+        $classes = $this['classes'];
+        $classes[] = $name;
+        $classes = array_unique($classes);
+        sort($classes);
+        unset($this['classes']);
+        $this['classes'] = $classes;
+    }
+
+    public function hasClass(string $name) : bool
+    {
+        return in_array($name, $this['classes']);
+    }
+
+    public function removeClass(string $name)
+    {
+        $classes = array_filter(
+            $this['classes'],
+            function ($e) use ($name) {
+                return $e != $name;
+            }
+        );
+        sort($classes);
+        unset($this['classes']);
+        $this['classes'] = $classes;
+    }
+
+    public function classes() : array
+    {
+        return $this['classes'];
+    }
+
+    public function attr(string $name, $value = null)
+    {
+        if ($value === false) {
+            unset($this['attributes.'.$name]);
+            return null;
+        }
+        if ($value !== null) {
+            $this['attributes.'.$name] = $value;
+        }
+        if (isset($this['attributes.'.$name])) {
+            return $this['attributes.'.$name];
+        }
+        return null;
+    }
+
+    public function data(string $name, $value = null)
+    {
+        return $this->attr("data-$name", $value);
+    }
+
+    public function string() : string
+    {
+        $out = '';
+        //build opening tag
+        $out .= '<'.$this['tag'];
+        //build attributes
+        if ($attr = $this->htmlAttributes()) {
+            foreach ($attr as $key => $value) {
+                if (!"$value") {
+                    $out .= " $key";
+                } else {
+                    $value = htmlspecialchars($value);
+                    $out .= " $key=\"$value\"";
+                }
+            }
+        }
+        //continue t close opening tag and add content and closing tag if needed
+        if ($this['selfclosing']) {
+            $out .= ' />';
+        } else {
+            $out .= '>';
+            //build content
+            $out .= $this->htmlContent();
+            //build closing tag
+            $out .= '</'.$this['tag'].'>';
+        }
+        return $out;
+    }
+
+    public function __toString()
+    {
+        return $this->string();
+    }
+}
diff --git a/src/HtmlInterface.php b/src/HtmlInterface.php
new file mode 100644
index 0000000..49ec7e7
--- /dev/null
+++ b/src/HtmlInterface.php
@@ -0,0 +1,20 @@
+<?php
+/* HTML Object Strings | https://gitlab.com/byjoby/html-object-strings | MIT License */
+namespace HtmlObjectStrings;
+
+use Flatrr\FlatArrayInterface;
+
+interface HtmlInterface extends FlatArrayInterface
+{
+    public function attr(string $name, $value = null);
+    public function data(string $name, $value = null);
+
+    public function addClass(string $name);
+    public function hasClass(string $name) : bool;
+    public function removeClass(string $name);
+    public function classes() : array;
+
+    public function string() : string;
+
+    public function __toString();
+}
diff --git a/src/Input.php b/src/Input.php
new file mode 100644
index 0000000..5947538
--- /dev/null
+++ b/src/Input.php
@@ -0,0 +1,30 @@
+<?php
+/* HTML Object Strings | https://gitlab.com/byjoby/html-object-strings | MIT License */
+namespace HtmlObjectStrings;
+
+class Input extends GenericTag
+{
+    const TAG = 'input';
+    const SELFCLOSING = true;
+    const TYPE = 'text';
+
+    protected function htmlInit()
+    {
+        parent::htmlInit();
+        $this->attr('type', static::TYPE);
+    }
+
+    protected function htmlContent()
+    {
+        return parent::htmlContent();
+    }
+
+    protected function htmlAttributes()
+    {
+        $attr = parent::htmlAttributes();
+        if ($value = $this->htmlContent()) {
+            $attr['value'] = $value;
+        }
+        return $attr;
+    }
+}
diff --git a/tests/GenericTagTest.php b/tests/GenericTagTest.php
new file mode 100644
index 0000000..a531fe7
--- /dev/null
+++ b/tests/GenericTagTest.php
@@ -0,0 +1,79 @@
+<?php
+/* HTML Object Strings | https://gitlab.com/byjoby/html-object-strings | MIT License */
+declare(strict_types=1);
+namespace HtmlObjectStrings;
+
+use PHPUnit\Framework\TestCase;
+
+class GenericTagTest extends TestCase
+{
+    use \SteveGrunwell\PHPUnit_Markup_Assertions\MarkupAssertionsTrait;
+
+    public function testBasicClassManagement()
+    {
+        /*
+        This section tests the basic class adding, removing, and output features
+         */
+        $h = new GenericTag();
+        //default is no classes
+        $this->assertEquals([], $h->classes());
+        $this->assertFalse($h->hasClass('foo'));
+        //adding a class
+        $h->addClass('foo');
+        //should now exist
+        $this->assertEquals(['foo'], $h->classes());
+        $this->assertTrue($h->hasClass('foo'));
+        //adding a second time shouldn't change anything
+        $h->addClass('foo');
+        $this->assertEquals(['foo'], $h->classes());
+        $this->assertTrue($h->hasClass('foo'));
+        //adding another class
+        $h->addClass('bar');
+        //should now exist, and classes should be in alphabetical order
+        $this->assertEquals(['bar','foo'], $h->classes());
+        $this->assertTrue($h->hasClass('bar'));
+        //removing a class
+        $h->addClass('abc');
+        $h->removeClass('bar');
+        //bar should now not exist, and classes should be in alphabetical order
+        $this->assertEquals(['abc','foo'], $h->classes());
+        $this->assertFalse($h->hasClass('bar'));
+    }
+
+    public function testDataAndAttributeManagement()
+    {
+        /*
+        This section tests the basic getting/setting of attributes
+         */
+        $h = new GenericTag();
+        //set and get an attribute
+        $h->attr('foo', 'bar');
+        $this->assertEquals('bar', $h->attr('foo'));
+        //set and get data
+        $h->data('foo', 'baz');
+        $this->assertEquals('baz', $h->data('foo'));
+        $this->assertEquals('baz', $h->attr('data-foo'));
+        $this->assertEquals('bar', $h->attr('foo'));
+    }
+
+    public function testMarkupOutput()
+    {
+        /*
+        Test that output has the correct attributes and classes for what was
+        configured into the object
+         */
+        $h = new GenericTag();
+        $h['tag'] = 'div';
+        $h['selfclosing'] = false;
+        $h['content'] = 'markup content';
+        $h->attr('id', 'h');
+        $h->data('foo', 'bar');
+        $h->addClass('class-foo');
+        $h->addClass('class-bar');
+        //should be a div tag
+        $this->assertContainsSelector('div', "$h");
+        $this->assertContainsSelector('div#h', "$h");
+        $this->assertContainsSelector('div[data-foo="bar"]', "$h");
+        $this->assertContainsSelector('div.class-foo.class-bar', "$h");
+    }
+}