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[3.0] Fix string literal cleanup #9067

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Merged
jdarwood007 merged 1 commit into from
Nov 25, 2025
Merged

[3.0] Fix string literal cleanup #9067

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14 changes: 5 additions & 9 deletions Sources/Db/APIs/MySQL.php
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Original file line number Diff line number Diff line change
Expand Up @@ -129,12 +129,14 @@ public function query(string $db_string, array $db_values = [], ?object $connect
{
// Comments that are allowed in a query are preg_removed.
$allowed_comments_from = [
'~\'\X*?\'~s',
'~\s+~s',
'~/\*!40001 SQL_NO_CACHE \*/~',
'~/\*!40000 USE INDEX \([A-Za-z\_]+?\) \*/~',
'~/\*!40100 ON DUPLICATE KEY UPDATE id_msg = \d+ \*/~',
];
$allowed_comments_to = [
' %s ',
' ',
'',
'',
Expand Down Expand Up @@ -169,18 +171,12 @@ public function query(string $db_string, array $db_values = [], ?object $connect

// First, we clean strings out of the query, reduce whitespace, lowercase, and trim - so we can check it over.
if (!$this->disableQueryCheck) {
$clean = preg_split('/(?:\\\\{2})*\K(?<![\'\\\\])\'(?![\'])/', $db_string);

for ($i = 0; $i < \count($clean); $i++) {
if ($i % 2 === 1) {
$clean[$i] = ' %s ';
}
}

// Clear out escaped backslashes & single quotes first, to make it simpler to ID & remove string literals
$clean = str_replace(array('\\\\', '\\\'', '\'\''), array('', '', ''), $db_string);
$clean = trim(strtolower(preg_replace(
$allowed_comments_from,
$allowed_comments_to,
implode('', $clean),
$clean,
)));

if (
Expand Down