adminerevo/adminer/schema.inc.php

<?php
page_header(lang('Database schema'), "", array(), $_GET["db"]);

$table_pos = array();
$table_pos_js = array();
// saved in one cookie because there is a limit of 20 cookies per domain
preg_match_all('~([^:]+):([-0-9.]+)x([-0-9.]+)(_|$)~', $_COOKIE["schema"], $matches, PREG_SET_ORDER); //! ':' in table name
foreach ($matches as $i => $match) {
	$table_pos[$match[1]] = array($match[2], $match[3]);
	$table_pos_js[] = "\n\t'" . addcslashes($match[1], "\r\n'\\") . "': [ $match[2], $match[3] ]";
}

$top = 0;
$base_left = -1;
$schema = array(); // table => array("fields" => array(name => field), "pos" => array(top, left), "references" => array(table => array(left => array(source, target))))
$referenced = array(); // target_table => array(table => array(left => target_column))
$lefts = array(); // float => bool
$result = $dbh->query("SHOW TABLE STATUS");
while ($row = $result->fetch_assoc()) {
	if (!isset($row["Engine"])) { // view
		continue;
	}
	$pos = 0;
	$schema[$row["Name"]]["fields"] = array();
	foreach (fields($row["Name"]) as $name => $field) {
		$pos += 1.25;
		$field["pos"] = $pos;
		$schema[$row["Name"]]["fields"][$name] = $field;
	}
	$schema[$row["Name"]]["pos"] = ($table_pos[$row["Name"]] ? $table_pos[$row["Name"]] : array($top, 0));
	if ($row["Engine"] == "InnoDB") {
		foreach (foreign_keys($row["Name"]) as $val) {
			if (!$val["db"]) {
				$left = $base_left;
				if ($table_pos[$row["Name"]][1] || $table_pos[$row["Name"]][1]) {
					$left = min($table_pos[$row["Name"]][1], $table_pos[$val["table"]][1]) - 1;
				} else {
					$base_left -= .1;
				}
				while ($lefts[(string) $left]) {
					// find free $left
					$left -= .0001;
				}
				$schema[$row["Name"]]["references"][$val["table"]][(string) $left] = array($val["source"], $val["target"]);
				$referenced[$val["table"]][$row["Name"]][(string) $left] = $val["target"];
				$lefts[(string) $left] = true;
			}
		}
	}
	$top = max($top, $schema[$row["Name"]]["pos"][0] + 2.5 + $pos);
}
$result->free();

?>
<div id="schema" style="height: <?php echo $top; ?>em;">
<script type="text/javascript">
table_pos = {<?php echo implode(",", $table_pos_js) . "\n"; ?>};
em = document.getElementById('schema').offsetHeight / <?php echo $top; ?>;
document.onmousemove = schema_mousemove;
document.onmouseup = schema_mouseup;
</script>
<?php
foreach ($schema as $name => $table) {
	echo "<div class='table' style='top: " . $table["pos"][0] . "em; left: " . $table["pos"][1] . "em;' onmousedown='schema_mousedown(this, event);'>";
	echo '<a href="' . htmlspecialchars($SELF) . 'table=' . urlencode($name) . '"><strong>' . htmlspecialchars($name) . "</strong></a><br />\n";
	foreach ($table["fields"] as $field) {
		$val = htmlspecialchars($field["field"]);
		$title = ' title="' . htmlspecialchars($field["full_type"] . ($field["null"] ? " " . lang('NULL') : '')) . '"';
		if (preg_match('~char|text~', $field["type"])) {
			$val = "<span class='char'$title>$val</span>";
		} elseif (preg_match('~date|time|year~', $field["type"])) {
			$val = "<span class='date'$title>$val</span>";
		} elseif (preg_match('~binary|blob~', $field["type"])) {
			$val = "<span class='binary'$title>$val</span>";
		} elseif (preg_match('~enum|set~', $field["type"])) {
			$val = "<span class='enum'$title>$val</span>";
		} else {
			$val = "<span$title>$val</span>";
		}
		echo ($field["primary"] ? "<em>$val</em>" : $val) . "<br />\n";
	}
	foreach ((array) $table["references"] as $target_name => $refs) {
		foreach ($refs as $left => $ref) {
			$left1 = $left - $table_pos[$name][1];
			$i = 0;
			foreach ($ref[0] as $source) {
				echo '<div class="references" title="' . htmlspecialchars($target_name) . "\" id='refs$left-" . ($i++) . "' style='left: $left1" . "em; top: " . $table["fields"][$source]["pos"] . "em; padding-top: .5em;'><div style='border-top: 1px solid Gray; width: " . (-$left1) . "em;'></div></div>\n";
			}
		}
	}
	foreach ((array) $referenced[$name] as $target_name => $refs) {
		foreach ($refs as $left => $columns) {
			$left1 = $left - $table_pos[$name][1];
			$i = 0;
			foreach ($columns as $target) {
				echo '<div class="references" title="' . htmlspecialchars($target_name) . "\" id='refd$left-" . ($i++) . "' style='left: $left1" . "em; top: " . $table["fields"][$target]["pos"] . "em; height: 1.25em; background: url(arrow.gif) no-repeat right center;'><div style='height: .5em; border-bottom: 1px solid Gray; width: " . (-$left1) . "em;'></div></div>\n";
			}
		}
	}
	echo "</div>\n";
}
foreach ($schema as $name => $table) {
	foreach ((array) $table["references"] as $target_name => $refs) {
		foreach ($refs as $left => $ref) {
			$min_pos = $top;
			$max_pos = -10;
			foreach ($ref[0] as $key => $source) {
				$pos1 = $table["pos"][0] + $table["fields"][$source]["pos"];
				$pos2 = $schema[$target_name]["pos"][0] + $schema[$target_name]["fields"][$ref[1][$key]]["pos"];
				$min_pos = min($min_pos, $pos1, $pos2);
				$max_pos = max($max_pos, $pos1, $pos2);
			}
			echo "<div class='references' id='refl$left' style='left: $left" . "em; top: $min_pos" . "em; padding: .5em 0;' /><div style='border-right: 1px solid Gray; margin-top: 1px; height: " . ($max_pos - $min_pos) . "em;'></div></div>\n";
		}
	}
}
?>
</div>