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testGraph.php
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testGraph.php
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<?php
$conn = new mysqli('localhost','root', 'root', 'thinkmusic');
$rs = $conn->query('show tables');
$tables = array();
while($row = $rs->fetch_row())
{
$tables[] = $row[0];
}
$tables = array('action_lkp', 'song', 'song_action_xref', 'genre_lkp', 'sub_genre_lkp', 'sub_genre_lkp', 'artist_band_lkp', 'license_type_lkp', 'writer_lkp', 'skin_lkp', 'copyright_holder_lkp', 'label_lkp');
//$tables = array('action_lkp', 'song_action_xref');
$fk_structure = array();
$fld_structure = array();
$left_border = 0;
$right_border = 0;
$canvas = imagecreatetruecolor(2400, 800);
$white = imagecolorallocate($canvas, 255, 255, 255);
$black = imagecolorallocate($canvas, 0, 0, 0);
imagefilledrectangle($canvas, 0, 0, 2400, 800, $white);
//imagerectangle($canvas, 0, 0, 800, 800, $white);
foreach($tables as $table)
{
$fk_structure[$table] = array();
$rs = $conn->query('show create table '.$table);
$row = $rs->fetch_row();
$table_structure = explode(PHP_EOL, $row[1]);
foreach($table_structure as $table_name => $table_structure_row)
{
if(preg_match('/FOREIGN/', $table_structure_row))
{
$table_structure_row_array = explode('CONSTRAINT', $table_structure_row);
//echo '<pre>';
//print_r(preg_split('/[CONSTRAINTS]*[FOREIGN KEY]*[REFERENCES]/', $table_structure_row, null, PREG_SPLIT_NO_EMPTY));
//print_r($table_structure_row_array);
$table_structure_row_array1 = explode('FOREIGN KEY', $table_structure_row_array[1]);
$fk_name = replace_s($table_structure_row_array1[0]);
$fk_structure[$table][$fk_name] = array();
$table_structure_row_array2 = explode('REFERENCES', $table_structure_row_array1[1]);
$fk_source_field_name = replace_s($table_structure_row_array2[0]);
$fk_structure[$table][$fk_name]['source_field_name'] = $fk_source_field_name;
$table_structure_row_array3 = explode(' ', trim($table_structure_row_array2[1]));
$fk_dest_field_name = replace_s($table_structure_row_array3[1]);
$fk_structure[$table][$fk_name]['dest_field_name'] = $fk_dest_field_name;
$fk_dest_table_name = replace_s($table_structure_row_array3[0]);
$fk_structure[$table][$fk_name]['dest_table_name'] = $fk_dest_table_name;
//print_r($table_structure_row_array3);
//echo '</pre>';
//echo 'sssssss';
}
}
}
/* echo '<pre>';
print_r($fk_structure);
echo '</pre>';
die;
*/
/**
Array
(
[song_action_xref] => Array
(
[fk_sa_ac] => Array
(
[source_field_name] => action_id
[dest_field_name] => action_id
[dest_table_name] => action_lkp
)
[fk_sa_sng] => Array
(
[source_field_name] => song_id
[dest_field_name] => song_id
[dest_table_name] => song
)
)
)
*/
foreach($fk_structure as $table_name => $const)
{
$rs1 = $conn->query('describe '.$table_name);
$height = ($rs1->num_rows * 21) + 80;
imagerectangle($canvas, $left_border + 50, 50, $right_border + 200, 80, $black);
imagerectangle($canvas, $left_border + 50, 50, $right_border + 200, $height, $black);
//imagestring($canvas, 52, 52, 5, $table_name, $black);
$font = '/usr/share/fonts/truetype/freefont/FreeMono.ttf';
imagettftext($canvas, 9, 0, $left_border + 55, 65, $black, $font, $table_name);
$fld_structure[$table_name] = array();
$initial = 95;
while($row1 = $rs1->fetch_row())
{
//print_r($row);
//echo '<br/>';
$fld_structure[$table_name][$row1[0]] = array($left_border + 55, $initial);
imagettftext($canvas, 9, 0, $left_border + 55, $initial, $black, $font, $row1[0]);
$initial += 20;
}
//die;
$left_border += 200;
$right_border += 200;
}
foreach($fk_structure as $table_name => $flds)
{
foreach($flds as $fk_key => $flds)
{
if(!empty($flds['source_field_name']))
{
$arrow_src_coords = $fld_structure[$table_name][$flds['source_field_name']];
$arrow_dest_coords = $fld_structure[$flds['dest_table_name']][$flds['dest_field_name']];
arrow($canvas, $arrow_src_coords[0], $arrow_src_coords[1], $arrow_dest_coords[0], $arrow_dest_coords[1], 10, 5, $black);
}
}
}
header('content-type: image/png');
imagepng($canvas);
imagedestroy($canvas);
function arrow($im, $x1, $y1, $x2, $y2, $alength, $awidth, $color) {
$distance = sqrt(pow($x1 - $x2, 2) + pow($y1 - $y2, 2));
$dx = $x2 + ($x1 - $x2) * $alength / $distance;
$dy = $y2 + ($y1 - $y2) * $alength / $distance;
$k = $awidth / $alength;
$x2o = $x2 - $dx;
$y2o = $dy - $y2;
$x3 = $y2o * $k + $dx;
$y3 = $x2o * $k + $dy;
$x4 = $dx - $y2o * $k;
$y4 = $dy - $x2o * $k;
imageline($im, $x1, $y1, $dx, $dy, $color);
imagefilledpolygon($im, array($x2, $y2, $x3, $y3, $x4, $y4), 3, $color);
}
function replace_s($str)
{
return trim(str_replace(')', '', str_replace('(', '', str_replace('`', '', $str))));
}
?>