PHP code example of hoa / graph

1. Go to this page and download the library: Download hoa/graph library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

hoa / graph example snippets


// Create the graph instance.
// By default, loops are not allowed and we would like loops for this example,
// so we enable them.
$graph = new Hoa\Graph\AdjacencyList(Hoa\Graph::ALLOW_LOOP);

// Create 4 vertices (aka nodes).
$n1 = new Hoa\Graph\SimpleNode('n1');
$n2 = new Hoa\Graph\SimpleNode('n2');
$n3 = new Hoa\Graph\SimpleNode('n3');
$n4 = new Hoa\Graph\SimpleNode('n4');

// Create edges (aka links) between them.
$graph->addNode($n1);
$graph->addNode($n2, [$n1]); // n2 has parent n1.
$graph->addNode($n3, [$n1, $n2, $n3]); // n3 has parents n1, n2 and n3.
$graph->addNode($n4, [$n3]); // n4 has parent n3.
$graph->addNode($n2, [$n4]); // Add parent n4 to n2.


echo $graph;

/**
 * Will output:
 *     digraph {
 *         n1;
 *         n2;
 *         n3;
 *         n4;
 *         n1 -> n2;
 *         n1 -> n3;
 *         n2 -> n3;
 *         n3 -> n3;
 *         n3 -> n4;
 *         n4 -> n2;
 *     }
 */

sh
$ dot -Tsvg -oresult.svg <( echo 'digraph { … }'; )