<?php
// generate mysql graph
echo "Opening Database Connection...\n";
$link = mysql_connect('localhost', 'root', '123456');
if (!$link) {
    die('keine Verbindung möglich: ' . mysql_error());
}
#mysql_close($link);
mysql_select_db('pbs');


$result = mysql_list_tables('pbs');
echo "Get Tables ...\n";
while ($row = mysql_fetch_row($result)) {
    $tables[$row[0]] = array();
}
mysql_free_result($result);

// Save all table-names
foreach($tables as $tablename => $data){
	$result = mysql_query("SHOW COLUMNS FROM $tablename");		
	while ($row = mysql_fetch_assoc($result)) {
	   $tables[$tablename][] = $row;
	}	
}
mysql_free_result($result);
echo "Get Fieldlist from tables ...\n";
// Prepare dot-string
$b = "\n";
$str = 'digraph x {
	node [shape=record];
	ranksep=3;
	size="20,20";'.$b;
	
// get all table-fields
foreach($tables as $tablename => $data){
	$str .= $tablename .' [label= "{';
	$array = array();
	$array[] = strtoupper($tablename);
	foreach($data as $d){
		$array[] = "<".$d['Field'].">".$d['Field'];
	}
	$str .= implode("|",$array);
	$str .= '}",width=3];'.$b;
}

echo "Generate the Links ...\n";
// link the database-items (foreign-keys)
foreach($tables as $tablename1 => $table1){
	foreach($table1 as $field1){
		$f1 = $field1['Field'];
		foreach($tables as $tablename2 => $table2){
			foreach($table2 as $field2){
				$f2 = $field2['Field'];
				if( $tablename1 != $tablename2 && $f1 == $f2 && strstr($f1,'ID') && "pbs_".str_replace("ID",'',$f1) == $tablename1){
					// Draw lines to tables
					$str .= $tablename1 ." -> ".$tablename2.";".$b;
					// draw lines to table-items
					#$str .= $tablename1.":".$f1 ." -> ".$tablename2.":".$f2 .";".$b;
				}
			}
		}
	}
}
$str .= "}";
echo "Write to file ...\n";
// Create the dot file
$fp = fopen("mysqlGraph.dot", "w");
fputs ($fp, $str);
fclose ($fp);
// Generate the image
echo "Generate the image ...\n";
exec("dot -Tpng mysqlGraph.dot >mysqlGraph.png");
// delete the dot file
unlink ('mysqlGraph.dot');
echo "Ready!\n";