我正在PHP中以*.xls格式导出文件。导出后，文件中有一些特殊的字符在文件中你有什么想法吗？我的图书馆就像这种问号
<?php
class Exportclass {
private $filename;
private $headerArray;
private $bodyArray;
private $rowNo = 0;
function ExportXLS($filename) {
$this->filename = $filename;
}
public function addHeader($header) {
if(is_array($header)) {
$this->headerArray[] = $header;
} else {
$this->headerArray[][0] = $header;
}
}
public function addRow($row) {
if(is_array($row)) {
if(is_array($row[0])) {
foreach($row as $key=>$array) {
$this->bodyArray[] = $array;
}
} else {
$this->bodyArray[] = $row;
}
} else {
$this->bodyArray[][0] = $row;
}
}
public function returnSheet() {
return $this->buildXLS();
}
public function sendFile() {
$xls = $this->buildXLS();
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Disposition: attachment;filename=".$this->filename);
header("Content-Transfer-Encoding:binary");
echo $xls;
exit;
}
private function buildXLS() {
$xls = pack("ssssss", 0x809, 0x8, 0x0, 0x10, 0x0, 0x0);
if(is_array($this->headerArray)) {
$xls .= $this->build($this->headerArray);
}
if(is_array($this->bodyArray)) {
$xls .= $this->build($this->bodyArray);
}
$xls .= pack("ss", 0x0A, 0x00);
return $xls;
}
private function build($array) {
$build = '';
foreach($array as $key=>$row) {
$colNo = 0;
foreach($row as $key2=>$field) {
if(is_numeric($field)) {
$build .= $this->numFormat($this->rowNo, $colNo, $field);
} else {
$build .= $this->textFormat($this->rowNo, $colNo, $field);
}
$colNo++;
}
$this->rowNo++;
}
return $build;
}
private function textFormat($row, $col, $data) {
$data = utf8_decode($data);
$length = strlen($data);
$field = pack("ssssss", 0x204, 8 + $length, $row, $col, 0x0, $length);
$field .= $data; return $field;
}
private function numFormat($row, $col, $data) {
$field = pack("sssss", 0x203, 14, $row, $col, 0x0);
$field .= pack("d", $data);
return $field;
}
}
?>