[英]Exporting encrypted record to csv file from mysql table in PHP fails
我有一個PHP頁面,該頁面從SQL表中選擇記錄,然后將記錄的加密版本發送到CSV文件。 我的問題是:當我選擇未使用openssl加密的記錄時,它會成功導出,但是,如果我包含加密,它將打開一個空白屏幕。
我希望這里能有所幫助。 提前謝謝了
This is my code:
<?php
// Database Connection
require("xxx.php");
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('aes-256-cbc'))
$encryption_key = 'bRuD5WYw5wd0rdHR9yLlM6wt2vteuiniQBqE70nAuhU=';
$result='select *
from encrypt';
$file='grade/file'.date('YmdDH_i_s').'.csv';
$qry = "select * from gb_centre where use_flag=1";
$rs = mysqli_query($con,$qry);
$getRowAssoc = mysqli_fetch_assoc($rs);
$query = (
openssl_encrypt($result->uniqueid,'AES-256-CBC',$encryption_key,0,$iv),
openssl_encrypt($result->username,'AES-256-CBC',$encryption_key,0,$iv),
openssl_encrypt($result->shortname,'AES-256-CBC',$encryption_key,0,$iv),
openssl_encrypt($result->rawgrade,'AES-256-CBC',$encryption_key,0,$iv),
openssl_encrypt($result->finalgrade,'AES-256-CBC',$encryption_key,0,$iv),
openssl_encrypt($result->cid,'AES-256-CBC',$encryption_key,0,$iv),
openssl_encrypt($result->id,'AES-256-CBC',$encryption_key,0,$iv)
);
if (!$result = mysqli_query($con, $query)) {
exit(mysqli_error($con));
}
$users = array($uniqueid,$username,$shortname,$rawgrade,$finalgrade,$cid,$id);
if (mysqli_num_rows($result) > 0) {
while ($row = mysqli_fetch_assoc($result)) {
$users[] = $row;
}
}
header('Content-Type: text/csv; charset=utf-8');
header('Content-Disposition: attachment; filename='.$getRowAssoc['cid'].date('_Y-m-d_Hi').'.csv');
$output = fopen('php://output', 'w');
fputcsv($output, array('a1', 'a2', 'a3', 'a4', 'a5','a6','a7'));
if (count($users) > 0) {
foreach ($users as $row) {
fputcsv($output, $row);
}
}
?>
**
**我已經編輯了代碼部分,它現在可以使用PHP OpenSSL將記錄導出到csv並可以正常工作,問題是,它在CSV文件中添加了額外的列。 我不知道錯誤在哪里。 這是編輯后的代碼:
<?php
// Database Connection
require("config.php");
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('aes-256-cbc'));
$key = 'bRuD5WYw5wd0rdHR9yLlM6wt2vteuiniQBqE70nAuhU=';
$encryption_key = 'bRuD5WYw5wd0rdHR9yLlM6wt2vteuiniQBqE70nAuhU=';
$string='select *
from encrypt'
$qry = "select * from gb_centre where use_flag=1";
$rs = mysqli_query($con,$qry);
$getRowAssoc = mysqli_fetch_assoc($rs);
if (!$result = mysqli_query($con, $string)) {
exit(mysqli_error($con));
}
if (mysqli_num_rows($result) > 0) {
while ($row = mysqli_fetch_assoc($result)) {
$uniqueid[] = openssl_encrypt($row->uniqueid,'AES-256-CBC',$encryption_key,0,$iv);
$username[] = openssl_encrypt($row->username,'AES-256-CBC',$encryption_key,0,$iv);
$shortname[] = openssl_encrypt($row->shortname,'AES-256-CBC',$encryption_key,0,$iv);
$rawgrade[] = openssl_encrypt($row->rawgrade,'AES-256-CBC',$encryption_key,0,$iv);
$finalgrade[] = openssl_encrypt($row->finalgrade,'AES-256-CBC',$encryption_key,0,$iv);
$cid[] = openssl_encrypt($row->cid,'AES-256-CBC',$encryption_key,0,$iv);
$id[] = openssl_encrypt($row->id,'AES-256-CBC',$encryption_key,0,$iv);
}
}
$users = array($uniqueid,$username,$shortname,$rawgrade,$finalgrade,$cid,$i);
header('Content-Type: text/csv; charset=utf-8');
header('Content-Disposition: attachment; filename='.$getRowAssoc['cid'].date('_Y-m-d_Hi').'.csv');
$output = fopen('php://output', 'w');
fputcsv($output, array('a1', 'a2', 'a3', 'a4', 'a5','a6','a7'));
if (count($users) > 0) {
foreach ($users as $row1) {
fputcsv($output, $row1);
}
}
?>
看起來您在執行查詢的基礎方面遇到了困難。 我只是編寫一些簡單的代碼來獲取並顯示單個查詢的結果。 然后,當您有了主意時,可以在代碼中添加更多內容。
這是一個使用預准備語句的示例。 這將防止sql注入。 您應該學習如何將准備好的語句用於以后的所有查詢。 這里是一個很好的資源鏈接,它將教您如何正確執行所需的任何查詢。 將此鏈接添加為書簽並經常引用。 MySQLi預備語句
此代碼將從查詢返回的結果的每一行中打印出唯一標識。
$query = "SELECT *
FROM gb_centre
WHERE use_flag = ?";
$stmt = $con->prepare($query);
$stmt->bind_param('i', 1); //set your bindings
$stmt->execute();
while ($result = $stmt->fetch_object()) {
echo $result->uniqueid . '<br>';
}
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