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CentOS 7.0 - man page for gv (centos section 3php)

gv(3php)												     gv(3php)

NAME
gv_php - graph manipulation in php
SYNOPSIS
#!/usr/bin/php <? include("gv.php") ?>
USAGE
INTRODUCTION
gv_php is a dynamically loaded extension for php that provides access to the graph facilities of graphviz.
COMMANDS
New graphs New empty graph graph_handle gv::graph (name); graph_handle gv::digraph (name); graph_handle gv::strictgraph (name); graph_handle gv::strictdigraph (name); New graph from a dot-syntax string or file graph_handle gv::readstring (string); graph_handle gv::read (string filename); graph_handle gv::read (channel); Add new subgraph to existing graph graph_handle gv::graph (graph_handle, name); New nodes Add new node to existing graph node_handle gv::node (graph_handle, name); New edges Add new edge between existing nodes edge_handle gv::edge (tail_node_handle, head_node_handle); Add a new edge between an existing tail node, and a named head node which will be induced in the graph if it doesn't already exist edge_handle gv::edge (tail_node_handle, head_name); Add a new edge between an existing head node, and a named tail node which will be induced in the graph if it doesn't already exist edge_handle gv::edge (tail_name, head_node_handle); Add a new edge between named tail and head nodes which will be induced in the graph if they don't already exist edge_handle gv::edge (graph_handle, tail_name, head_name); Setting attribute values Set value of named attribute of graph/node/edge - creating attribute if necessary string gv::setv (graph_handle, attr_name, attr_value); string gv::setv (node_handle, attr_name, attr_value); string gv::setv (edge_handle, attr_name, attr_value); Set value of existing attribute of graph/node/edge (using attribute handle) string gv::setv (graph_handle, attr_handle, attr_value); string gv::setv (node_handle, attr_handle, attr_value); string gv::setv (edge_handle, attr_handle, attr_value); Getting attribute values Get value of named attribute of graph/node/edge string gv::getv (graph_handle, attr_name); string gv::getv (node_handle, attr_name); string gv::getv (edge_handle, attr_name); Get value of attribute of graph/node/edge (using attribute handle) string gv::getv (graph_handle, attr_handle); string gv::getv (node_handle, attr_handle); string gv::getv (edge_handle, attr_handle); Obtain names from handles string gv::nameof (graph_handle); string gv::nameof (node_handle); string gv::nameof (attr_handle); Find handles from names graph_handle gv::findsubg (graph_handle, name); node_handle gv::findnode (graph_handle, name); edge_handle gv::findedge (tail_node_handle, head_node_handle); attribute_handle gv::findattr (graph_handle, name); attribute_handle gv::findattr (node_handle, name); attribute_handle gv::findattr (edge_handle, name); Misc graph navigators returning handles node_handle gv::headof (edge_handle); node_handle gv::tailof (edge_handle); graph_handle gv::graphof (graph_handle); graph_handle gv::graphof (edge_handle); graph_handle gv::graphof (node_handle); graph_handle gv::rootof (graph_handle); Obtain handles of proto node/edge for setting default attribute values node_handle gv::protonode (graph_handle); edge_handle gv::protoedge (graph_handle); Iterators Iteration termination tests bool gv::ok (graph_handle); bool gv::ok (node_handle); bool gv::ok (edge_handle); bool gv::ok (attr_handle); Iterate over subgraphs of a graph graph_handle gv::firstsubg (graph_handle); graph_handle gv::nextsubg (graph_handle, subgraph_handle); Iterate over supergraphs of a graph (obscure and rarely useful) graph_handle gv::firstsupg (graph_handle); graph_handle gv::nextsupg (graph_handle, subgraph_handle); Iterate over edges of a graph edge_handle gv::firstedge (graph_handle); edge_handle gv::nextedge (graph_handle, edge_handle); Iterate over outedges of a graph edge_handle gv::firstout (graph_handle); edge_handle gv::nextout (graph_handle, edge_handle); Iterate over edges of a node edge_handle gv::firstedge (node_handle); edge_handle gv::nextedge (node_handle, edge_handle); Iterate over out-edges of a node edge_handle gv::firstout (node_handle); edge_handle gv::nextout (node_handle, edge_handle); Iterate over head nodes reachable from out-edges of a node node_handle gv::firsthead (node_handle); node_handle gv::nexthead (node_handle, head_node_handle); Iterate over in-edges of a graph edge_handle gv::firstin (graph_handle); edge_handle gv::nextin (node_handle, edge_handle); Iterate over in-edges of a node edge_handle gv::firstin (node_handle); edge_handle gv::nextin (graph_handle, edge_handle); Iterate over tail nodes reachable from in-edges of a node node_handle gv::firsttail (node_handle); node_handle gv::nexttail (node_handle, tail_node_handle); Iterate over nodes of a graph node_handle gv::firstnode (graph_handle); node_handle gv::nextnode (graph_handle, node_handle); Iterate over nodes of an edge node_handle gv::firstnode (edge_handle); node_handle gv::nextnode (edge_handle, node_handle); Iterate over attributes of a graph attribute_handle gv::firstattr (graph_handle); attribute_handle gv::nextattr (graph_handle, attr_handle); Iterate over attributes of an edge attribute_handle gv::firstattr (edge_handle); attribute_handle gv::nextattr (edge_handle, attr_handle); Iterate over attributes of a node attribute_handle gv::firstattr (node_handle); attribute_handle gv::nextattr (node_handle, attr_handle); Remove graph objects bool gv::rm (graph_handle); bool gv::rm (node_handle); bool gv::rm (edge_handle); Layout Annotate a graph with layout attributes and values using a specific layout engine bool gv::layout (graph_handle, string engine); Render Render a layout into attributes of the graph bool gv::render (graph_handle); Render a layout to stdout bool gv::render (graph_handle, string format); Render to an open file bool gv::render (graph_handle, string format, channel fout); Render a layout to an unopened file by name bool gv::render (graph_handle, string format, string filename); Render to an open channel bool gv::renderchannel (graph_handle, string format, string channelname); Render to a string result gv::renderresult (graph_handle, string format, string outdata); Render a layout to a malloc'ed string, to be free'd by the caller (deprecated - too easy to leak memory) (still needed for "eval [gv::renderdata $G tk]" ) string gv::renderdata (graph_handle, string format); Writing graph back to file bool gv::write (graph_handle, string filename); bool gv::write (graph_handle, channel);
KEYWORDS
graph, dot, neato, fdp, circo, twopi, php. 14 February 2013 gv(3php)


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