Estrimados, me aparece el siguiente error al exportar una tabla a excel mediante
Warning: Cannot modify header information - headers already sent by (output started at /home/optchile/public_html/exportar_excel_admin.php:48) in /home/optchile/public_html/exportar_excel_admin.php on line 52
Warning: Cannot modify header information - headers already sent by (output started at /home/optchile/public_html/exportar_excel_admin.php:48) in /home/optchile/public_html/exportar_excel_admin.php on line 53
Warning: Cannot modify header information - headers already sent by (output started at /home/optchile/public_html/exportar_excel_admin.php:48) in /home/optchile/public_html/exportar_excel_admin.php on line 54
Warning: Cannot modify header information - headers already sent by (output started at /home/optchile/public_html/exportar_excel_admin.php:48) in /home/optchile/public_html/exportar_excel_admin.php on line 55
Warning: Cannot modify header information - headers already sent by (output started at /home/optchile/public_html/exportar_excel_admin.php:48) in /home/optchile/public_html/exportar_excel_admin.php on line 56
con el siguiente codigo:
Código PHP:
<?php
$proyecto = trim($row_Recordset1['proyecto']);
$fecha = date('d-m-Y');
header('Content-type: application/vnd.ms-excel');
header("Content-Disposition: attachment; filename=Mantenciones_realizadas_al_".$fecha.".xls");
header("Pragma: no-cache");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Expires: 0");
?>