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<?php
class turboSqlParser
{
var $debug;
function oob()
{
return ($this->p < 0 || $this->p >= $this->l);
}
function search($inRegEx)
{
//if ($this->debug)
// print_r('searching for: ' . $inRegEx . '<br>');
$matches = false;
preg_match($inRegEx, $this->s, $matches, PREG_OFFSET_CAPTURE, $this->p0);
$this->p = ($matches ? $matches[0][1] : -1);
if ($this->oob())
return false;
//$this->d = substr($this->s, $this->p, 1);
$this->d = $this->s{$this->p};
if ($this->debug)
print_r('found: ' . $this->d . ' at ' . $this->p . '<br>');
return true;
}
function tokenize($inD = 0)
{
$this->p += $inD;
if ($this->p > $this->p0)
{
$tok = substr($this->s, $this->p0, $this->p - $this->p0);
$this->t .= $tok;
if ($this->debug && $this->t && $tok)
print_r('token: [' . $this->t . ']<br>');
//$this->s = substr($this->s, $this->p);
//$this->l = strlen($this->s);
$this->p0 = $this->p;
}
}
function pusht()
{
if ($this->t)
array_push($this->r, $this->t);
}
function pushToken($inD = 0)
{
$this->tokenize($inD);
$this->pusht();
$this->t = '';
}
function start($inS)
{
$this->debug = false;
$this->s = $inS;
$this->l = strlen($this->s);
$this->r = array();
$this->d = '';
$this->p0 = 0;
$this->p = 0;
$this->t0 = 0;
$this->t = '';
$this->analyze();
}
function finish()
{
// FIXME: SJM please review. 1 character was being removed from end of last token
// so added logic to prevent a negative length param for substr
if ($this->p - $this->p0 > 0)
$this->t .= substr($this->s, $this->p0, $this->p - $this->p0);
else
$this->t .= substr($this->s, $this->p0);
$this->pusht();
}
function do_separator()
{
if ($this->debug)
print_r('doSeparator:<br>');
$this->tokenize(1);
}
function do_escape()
{
if ($this->debug)
print_r('doEscape:<br>');
$this->tokenize(2);
}
function do_sql_comment()
{
if ($this->debug)
print_r('doDashComment:<br>');
$this->tokenize(($this->d == '-' ? 2 : 1));
if ($this->search('/[\n]/'))
$this->tokenize(1);
}
function do_c_comment()
{
if ($this->debug)
print_r('doCComment:<br>');
$this->tokenize(2);
$n = 1;
while ($n && $this->search('/\/\*|\*\//'))
{
switch ($this->d) {
case '/':
$n++;
break;
case '*':
$n--;
break;
}
$this->tokenize(2);
}
}
function do_literal()
{
if ($this->debug)
print_r('doLiteral:<br>');
$this->tokenize(1);
$rx = "/" . $this->d . "|\\\\" . "/";
while ($this->search($rx))
{
switch ($this->d) {
case '\\':
$this->do_escape();
break;
default:
$this->tokenize(1);
return;
}
}
}
function analyze()
{
while ($this->search("/--|\/\*|[#'\"`\\;]/"))
{
if ($this->d == '\\')
$this->do_escape();
else
{
$this->pushToken();
switch ($this->d)
{
case ';':
$this->do_separator();
break;
case '/':
$this->do_c_comment();
break;
case '-':
case '#':
$this->do_sql_comment();
break;
default:
$this->do_literal();
break;
}
$this->pushToken();
}
}
$this->finish();
}
function split_sql($inSql)
{
$t = ';';
$this->start($inSql);
$tokens = $this->r;
$result = array();
$x = array();
foreach ($tokens as $token)
{
if ($token != $t)
array_push($x, $token);
else
{
$b = trim(join('', $x));
if ($b)
array_push($result, $b);
$x = array();
}
}
$b = trim(join('', $x));
if ($b && $b != $t)
array_push($result, $b);
return $result;
}
function is_bad_command($inCmd)
{
$matches = null;
$this->start($inCmd);
foreach ($this->r as $token)
{
preg_match('/^(--|\/\*|[#\'"`\\;])/', $token, $matches);
if (count($matches))
continue;
preg_match('/DROP.*DATABASE/i', $token, $matches);
if (count($matches))
return true;
preg_match('/LOAD|DATA\\s|INFILE/i', $token, $matches);
if (count($matches))
return true;
}
return false;
}
}
$sql_parser = new turboSqlParser();
/*
$sql = file_get_contents('edfromtheweb_backup.sql');
//$sql = 'SELECT * FROM testing_database.baseball';
$time = time();
$queries = $sql_parser->split_sql($sql);
$time = time() - $time;
echo('<pre>');
print_r(strval($time) . "\n");
print_r($queries);
echo('</pre>');
*/
?>
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