在我的旧站点中，不存在此问题。但在我更改服务器并导入数据库后，出现此消息。PHP 版本是 5.3，代码如下：
$sql = "SELECT * FROM movcaixa
WHERE data BETWEEN '$data1' AND '$data2' AND empresa = $empresa
ORDER BY data ASC";
$resMovCaixa = mysql_query($sql, $cnn) or die('Falha na conexão com o banco de dados');
$sql = "SELECT cp.id AS codigo, CONCAT('Pagamento ref. a ', des.descricao, ', conforme doc. nº ', cp.documento) AS hist, DATE_FORMAT(cp.quitacao, '%d/%m/%Y') AS data, cp.valorpago AS vlr, cp.documento AS doc, fr.nome AS forn, des.descricao AS desp
FROM contaspagar cp, fornecedor fr, despesa des
WHERE cp.fornecedor = fr.id AND cp.despesa = des.id AND cp.quitacao BETWEEN '$data1' AND '$data2' AND empresa = $empresa
ORDER BY data ASC";
$resContasPagar = mysql_query($sql, $cnn) or die(mysql_error($cnn));
$sql = "SELECT cr.id AS codigo, DATE_FORMAT(cr.quitacao, '%d/%m/%Y') AS data, CONCAT('Recebimento ref. ', cli.nome, ', conforme doc. ', cr.documento) AS hist, cr.valorpago AS vlr, cr.documento AS doc, cs.descricao AS cont
FROM contasreceber cr, contratoservico cs, cliente cli
WHERE cr.contratoservico = cs.id AND cs.cliente = cli.id AND cr.quitacao BETWEEN '$data1' AND '$data2' AND empresa = $empresa
ORDER BY cr.quitacao";
有人可以帮助我吗？