Question

我有一个问题。我无法使用PHP将我的数据数组写入文件。我在下面解释我的代码。

<?php
$result=array(array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'20','subcat_name'=>'pizza'),array('cat_id'=>'3','cat_name'=>'Food','subcat_id'=>'23','subcat_name'=>'pakhal'),array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'22','subcat_name'=>'wine'),array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'20','subcat_name'=>'pizza'),array('cat_id'=>'3','cat_name'=>'Food','subcat_id'=>'24','subcat_name'=>'fuddy'),array('cat_id'=>'4','cat_name'=>'Continetal','subcat_id'=>'25','subcat_name'=>'cont'));
$handle = fopen("file.txt", "w");
fwrite($handle, $result);
fclose($handle);
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename('file.txt'));
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize('file.txt'));
readfile('file.txt');
exit;
?>

这里我还需要下载该文件。在这里，我可以下载文件，但是fwrite() expects parameter 2 to be string array given in写在该文件中，没有数据。我需要将所有数据数据写入该文件并下载。请帮我解决这个问题。

Answer 1

如果您明确需要将数组放入文件中，则可以使用此

fwrite($handle, print_r($result, true));

或者你可以将它转换为json，就像这样

fwrite($handle, json_encode($result));

稍后当您阅读文件时，您只需使用json_decode($your_file_content)

撤消操作即可

Answer 2

写入该文件是没有意义的，除非您正在使用该文件执行某些您未向我们展示的内容。

<?php
$result=array(array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'20','subcat_name'=>'pizza'),array('cat_id'=>'3','cat_name'=>'Food','subcat_id'=>'23','subcat_name'=>'pakhal'),array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'22','subcat_name'=>'wine'),array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'20','subcat_name'=>'pizza'),array('cat_id'=>'3','cat_name'=>'Food','subcat_id'=>'24','subcat_name'=>'fuddy'),array('cat_id'=>'4','cat_name'=>'Continetal','subcat_id'=>'25','subcat_name'=>'cont'));

header('Content-Type: application/json');
header('Content-Disposition: attachment; filename=file.json');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');

$encoded = json_encode($result);

header('Content-Length: ' . strlen($encoded));

echo $encoded;

exit;

?>

Answer 3

首先，您必须处理数组并对其进行格式化，然后按如下方式写入文件：

$result=array(array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'20','subcat_name'=>'pizza'),array('cat_id'=>'3','cat_name'=>'Food','subcat_id'=>'23','subcat_name'=>'pakhal'),array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'22','subcat_name'=>'wine'),array('cat_id'=>'2','cat_name'=>'spirit','subcat_id'=>'20','subcat_name'=>'pizza'),array('cat_id'=>'3','cat_name'=>'Food','subcat_id'=>'24','subcat_name'=>'fuddy'),array('cat_id'=>'4','cat_name'=>'Continetal','subcat_id'=>'25','subcat_name'=>'cont'));
$handle = fopen("file.txt", "w");
$finalData = '';
foreach ($result as $resultData) {
    foreach ($resultData as $key => $value) {
        $finalData .= ($key. ': '. $value.PHP_EOL);//you can play with this data in any way you want now
    }

}
fwrite($handle, $finalData);
fclose($handle);
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename('file.txt'));
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize('file.txt'));
readfile('file.txt');
exit;

输出：

cat_id: 2
cat_name: spirit
subcat_id: 20
subcat_name: pizza
cat_id: 3
cat_name: Food
subcat_id: 23
subcat_name: pakhal
cat_id: 2
cat_name: spirit
subcat_id: 22
subcat_name: wine
cat_id: 2
cat_name: spirit
subcat_id: 20
subcat_name: pizza
cat_id: 3
cat_name: Food
subcat_id: 24
subcat_name: fuddy
cat_id: 4
cat_name: Continetal
subcat_id: 25
subcat_name: cont

无法使用PHP将数据数组写入文件

3 个答案:

输出：