k-holy/imagetypes.php

## imagetypes.php
<?php
namespace Acme;

class ImageType
{
    private $name;
    private $value;
    private $supportedImageTypes;

    public function __construct($name, $supportedImageTypes = null)
    {
        if (!defined($name)) {
            throw new \InvalidArgumentException(
                sprintf('The constant "%s" does not exists.', $name));
        }
        $this->name = $name;
        $this->supportedImageTypes = (isset($supportedImageTypes)) ? $supportedImageTypes : imagetypes();
    }

    public function __get($name)
    {
        $method = 'is' . ucfirst($name);
        if (method_exists($this, $method)) {
            return (bool)$this->{$method}();
        }
        $method = 'get' . ucfirst($name);
        if (method_exists($this, $method)) {
            return $this->{$method}();
        }
        throw new \InvalidArgumentException(
            sprintf('The property "%s" does not exists.', $name));
    }

    private function getName()
    {
        return $this->name;
    }

    private function getValue()
    {
        if (!isset($this->value)) {
            $this->value = constant($this->name);
        }
        return $this->value;
    }

    private function isSupported()
    {
        $_type = 0;
        switch ($this->getValue()) {
        case IMAGETYPE_GIF:
            $_type = IMG_GIF;
            break;
        case IMAGETYPE_JPEG:
            $_type = IMG_JPG;
            break;
        case IMAGETYPE_PNG:
            $_type = IMG_PNG;
            break;
        case IMAGETYPE_WBMP:
            $_type = IMG_WBMP;
            break;
        }
        return (($_type & $this->supportedImageTypes) !== 0);
    }

    private function getExtension()
    {
        $extension = image_type_to_extension($this->getValue());
        if ($extension === false) {
            return null;
        }
        return $extension;
    }

    private function getMimeType()
    {
        $mime = image_type_to_mime_type($this->getValue());
        if ($mime === 'application/octet-stream') {
            return null;
        }
        return $mime;
    }
}

define('SUPPORTED_IMAGE_TYPES', imagetypes());

$constants = get_defined_constants(true)['standard'];

$image_types = array_intersect_ukey($constants, $constants,
    function($name1, $name2) {
        return (strpos($name1, 'IMAGETYPE_') === 0) ? 0 : 1;
    }
);

$data = array();

array_walk($image_types, function($value, $name) use (&$data) {
    $data[] = new ImageType($name, SUPPORTED_IMAGE_TYPES);
});

$h = function($var, $default=null) {
    if (!isset($var)) {
        return $default;
    }
    if (is_bool($var)) {
        return ($var) ? '*' : '';
    }
    return htmlspecialchars($var, ENT_QUOTES, 'UTF-8');
}

?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<style type="text/css">
body  {font-family:monospace;}
table {border-collapse:collapse; margin:5px 0px;}
table * {text-align:left;}
caption {font-size:200%;}
th, td {padding:2px; border:solid 1px #999999;}
</style>
</head>
<body>

<table>
<thead>
    <tr>
        <th>name</th>
        <th>value</th>
        <th>supported</th>
        <th>extension</th>
        <th>mimeType</th>
    </tr>
</thead>
<tbody>
<?php foreach ($data as $image) : ?>
    <tr>
        <th><?=$h($image->name)?></th>
        <td><?=$h($image->value)?></td>
        <td><?=$h($image->supported)?></td>
        <td><?=$h($image->extension)?></td>
        <td><?=$h($image->mimeType)?></td>
    </tr>
<?php endforeach ?>
</tbody>
</table>

</body>
</html>
	<?php
	namespace Acme;

	class ImageType
	{
	private $name;
	private $value;
	private $supportedImageTypes;

	public function __construct($name, $supportedImageTypes = null)
	{
	if (!defined($name)) {
	throw new \InvalidArgumentException(
	sprintf('The constant "%s" does not exists.', $name));
	}
	$this->name = $name;
	$this->supportedImageTypes = (isset($supportedImageTypes)) ? $supportedImageTypes : imagetypes();
	}

	public function __get($name)
	{
	$method = 'is' . ucfirst($name);
	if (method_exists($this, $method)) {
	return (bool)$this->{$method}();
	}
	$method = 'get' . ucfirst($name);
	if (method_exists($this, $method)) {
	return $this->{$method}();
	}
	throw new \InvalidArgumentException(
	sprintf('The property "%s" does not exists.', $name));
	}

	private function getName()
	{
	return $this->name;
	}

	private function getValue()
	{
	if (!isset($this->value)) {
	$this->value = constant($this->name);
	}
	return $this->value;
	}

	private function isSupported()
	{
	$_type = 0;
	switch ($this->getValue()) {
	case IMAGETYPE_GIF:
	$_type = IMG_GIF;
	break;
	case IMAGETYPE_JPEG:
	$_type = IMG_JPG;
	break;
	case IMAGETYPE_PNG:
	$_type = IMG_PNG;
	break;
	case IMAGETYPE_WBMP:
	$_type = IMG_WBMP;
	break;
	}
	return (($_type & $this->supportedImageTypes) !== 0);
	}

	private function getExtension()
	{
	$extension = image_type_to_extension($this->getValue());
	if ($extension === false) {
	return null;
	}
	return $extension;
	}

	private function getMimeType()
	{
	$mime = image_type_to_mime_type($this->getValue());
	if ($mime === 'application/octet-stream') {
	return null;
	}
	return $mime;
	}
	}

	define('SUPPORTED_IMAGE_TYPES', imagetypes());

	$constants = get_defined_constants(true)['standard'];

	$image_types = array_intersect_ukey($constants, $constants,
	function($name1, $name2) {
	return (strpos($name1, 'IMAGETYPE_') === 0) ? 0 : 1;
	}
	);

	$data = array();

	array_walk($image_types, function($value, $name) use (&$data) {
	$data[] = new ImageType($name, SUPPORTED_IMAGE_TYPES);
	});

	$h = function($var, $default=null) {
	if (!isset($var)) {
	return $default;
	}
	if (is_bool($var)) {
	return ($var) ? '*' : '';
	}
	return htmlspecialchars($var, ENT_QUOTES, 'UTF-8');
	}

	?>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<style type="text/css">
	body {font-family:monospace;}
	table {border-collapse:collapse; margin:5px 0px;}
	table * {text-align:left;}
	caption {font-size:200%;}
	th, td {padding:2px; border:solid 1px #999999;}
	</style>
	</head>
	<body>

	<table>
	<thead>
	<tr>
	<th>name</th>
	<th>value</th>
	<th>supported</th>
	<th>extension</th>
	<th>mimeType</th>
	</tr>
	</thead>
	<tbody>
	<?php foreach ($data as $image) : ?>
	<tr>
	<th><?=$h($image->name)?></th>
	<td><?=$h($image->value)?></td>
	<td><?=$h($image->supported)?></td>
	<td><?=$h($image->extension)?></td>
	<td><?=$h($image->mimeType)?></td>
	</tr>
	<?php endforeach ?>
	</tbody>
	</table>

	</body>
	</html>