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| <?php | |
| /** | |
| * GraphViz rendering example | |
| * | |
| * This example demonstrates converting an EasyRdf\Graph into the | |
| * GraphViz graph file language. Using the 'Use Labels' option, you | |
| * can have resource URIs replaced with text based labels and using | |
| * 'Only Labelled' option, only the resources and properties with | |
| * a label will be displayed. | |
| * | |
| * Rending a graph to an image will only work if you have the | |
| * GraphViz 'dot' command installed. | |
| * | |
| * @package EasyRdf | |
| * @copyright Copyright (c) 2012-2014 Nicholas J Humfrey | |
| * @license http://unlicense.org/ | |
| */ | |
| require_once realpath(__DIR__.'/..')."/vendor/autoload.php"; | |
| require_once __DIR__."/html_tag_helpers.php"; | |
| $formats = array( | |
| 'PNG' => 'png', | |
| 'GIF' => 'gif', | |
| 'SVG' => 'svg' | |
| ); | |
| $format = \EasyRdf\Format::getFormat( | |
| isset($_REQUEST['format']) ? $_REQUEST['format'] : 'png' | |
| ); | |
| // Construct a graph of three people | |
| $graph = new \EasyRdf\Graph(); | |
| $graph->set('foaf:knows', 'rdfs:label', 'knows'); | |
| $bob = $graph->resource('http://www.example.com/bob', 'foaf:Person'); | |
| $alice = $graph->resource('http://www.example.com/alice', 'foaf:Person'); | |
| $carol = $graph->resource('http://www.example.com/carol', 'foaf:Person'); | |
| $bob->set('foaf:name', 'Bob'); | |
| $alice->set('foaf:name', 'Alice'); | |
| $carol->set('foaf:name', 'Carol'); | |
| $bob->add('foaf:knows', $alice); | |
| $bob->add('foaf:knows', $carol); | |
| $alice->add('foaf:knows', $bob); | |
| $alice->add('foaf:knows', $carol); | |
| // Create a GraphViz serialiser | |
| $gv = new \EasyRdf\Serialiser\GraphViz(); | |
| $gv->setUseLabels(isset($_REQUEST['ul'])); | |
| $gv->setOnlyLabelled(isset($_REQUEST['ol'])); | |
| // If this is a request for the image, just render it and exit | |
| if (isset($_REQUEST['image'])) { | |
| header("Content-Type: ".$format->getDefaultMimeType()); | |
| echo $gv->renderImage($graph, $format); | |
| exit; | |
| } | |
| ?> | |
| <html> | |
| <head><title>EasyRdf GraphViz Example</title></head> | |
| <body> | |
| <h1>EasyRdf GraphViz Example</h1> | |
| <form action='' method='get'> | |
| <?php | |
| echo label_tag('format').' '.select_tag('format', $formats).tag('br'); | |
| echo label_tag('ul', 'Use labels:').' '.check_box_tag('ul').tag('br'); | |
| echo label_tag('ol', 'Only labelled:').' '.check_box_tag('ol').tag('br'); | |
| echo submit_tag(); | |
| ?> | |
| </form> | |
| <div> | |
| <img src='?image&<?=$_SERVER["QUERY_STRING"]?>' /> | |
| </div> | |
| <pre style="margin: 0.5em; padding:0.5em; background-color:#eee; border:dashed 1px grey;"> | |
| <?php | |
| print htmlspecialchars( | |
| $gv->serialise($graph, 'dot') | |
| ); | |
| ?> | |
| </pre> | |
| </body> | |
| </html> |