如何从php脚本创建和下载csv文件？

Question

我是一名新手程序员,我搜索了很多关于我的问题,但找不到有用的解决方案或教程.

我的目标是我有一个PHP数组,数组元素显示在页面上的列表中.

我想添加一个选项,以便在用户需要时,他/她可以创建一个包含数组元素的CSV文件并下载它.

我不知道该怎么做.我也搜索了很多.但尚未找到任何有用的资源.

请为我提供一些教程,解决方案或建议,以便我自己实施.由于我是新手,请提供易于实施的解决方案.

我的数组看起来像:

Array
(
    [0] => Array
        (
            [fs_id] => 4c524d8abfc6ef3b201f489c
            [name] => restaurant
            [lat] => 40.702692
            [lng] => -74.012869
            [address] => new york
            [postalCode] => 
            [city] => NEW YORK
            [state] => ny
            [business_type] => BBQ Joint
            [url] => 
        )

)

Answer 1

您可以使用数组内置的fputcsv()从数组中生成正确的csv行,因此您必须循环并收集行.喜欢:

$f = fopen("tmp.csv", "w");
foreach ($array as $line) {
    fputcsv($f, $line)
}

要使浏览器提供"另存为"对话框,您必须像这样发送HTTP标头(请参阅rfc中有关此标头的更多信息):

header('Content-Disposition: attachment; filename="filename.csv";');

把它们放在一起:

function array_to_csv_download($array, $filename = "export.csv", $delimiter=";") {
    // open raw memory as file so no temp files needed, you might run out of memory though
    $f = fopen('php://memory', 'w'); 
    // loop over the input array
    foreach ($array as $line) { 
        // generate csv lines from the inner arrays
        fputcsv($f, $line, $delimiter); 
    }
    // reset the file pointer to the start of the file
    fseek($f, 0);
    // tell the browser it's going to be a csv file
    header('Content-Type: application/csv');
    // tell the browser we want to save it instead of displaying it
    header('Content-Disposition: attachment; filename="'.$filename.'";');
    // make php send the generated csv lines to the browser
    fpassthru($f);
}

你可以像这样使用它:

array_to_csv_download(array(
  array(1,2,3,4), // this array is going to be the first row
  array(1,2,3,4)), // this array is going to be the second row
  "numbers.csv"
);

更新:你可以使用for文件描述符
代替php://memory你php://output,并取消寻求和这样的:

function array_to_csv_download($array, $filename = "export.csv", $delimiter=";") {
    header('Content-Type: application/csv');
    header('Content-Disposition: attachment; filename="'.$filename.'";');

    // open the "output" stream
    // see http://www.php.net/manual/en/wrappers.php.php#refsect2-wrappers.php-unknown-unknown-unknown-descriptioq
    $f = fopen('php://output', 'w');

    foreach ($array as $line) {
        fputcsv($f, $line, $delimiter);
    }
}   

Answer 2

我没有足够的声誉来回复@ complex857解决方案.它工作得很好,但我不得不补充; 在Content-Disposition标头的末尾.没有它,浏览器会在文件名末尾添加两个破折号(例如,不是"export.csv",而是将文件保存为"export.csv--").可能它试图在标题行的末尾清理\ r \n.

正确的行应如下所示:

header('Content-Disposition: attachment;filename="'.$filename.'";');

如果CSV中包含UTF-8字符,则必须通过更改Content-Type行将编码更改为UTF-8:

header('Content-Type: application/csv; charset=UTF-8');

另外,我发现使用rewind()而不是fseek()更优雅:

rewind($f);

谢谢你的解决方案!

Answer 3

<?php 
mysql_connect('hostname', 'username', 'password');
mysql_select_db('dbname');
$qry = mysql_query("SELECT * FROM tablename");
$data = "";
while($row = mysql_fetch_array($qry)) {
  $data .= $row['field1'].",".$row['field2'].",".$row['field3'].",".$row['field4']."\n";
}

header('Content-Type: application/csv');
header('Content-Disposition: attachment; filename="filename.csv"');
echo $data; exit();
?>

Answer 4

使用以下代码将php数组转换为CSV

<?php
   $ROW=db_export_data();//Will return a php array
   header("Content-type: application/csv");
   header("Content-Disposition: attachment; filename=test.csv");
   $fp = fopen('php://output', 'w');

   foreach ($ROW as $row) {
        fputcsv($fp, $row);
   }
   fclose($fp);

Answer 5

那是我用于项目的功能，它可以按预期工作。

function array_csv_download( $array, $filename = "export.csv", $delimiter=";" )
{
    header( 'Content-Type: application/csv' );
    header( 'Content-Disposition: attachment; filename="' . $filename . '";' );

    // clean output buffer
    ob_end_clean();

    $handle = fopen( 'php://output', 'w' );

    // use keys as column titles
    fputcsv( $handle, array_keys( $array['0'] ) );

    foreach ( $array as $value ) {
        fputcsv( $handle, $value , $delimiter );
    }

    fclose( $handle );

    // flush buffer
    ob_flush();

    // use exit to get rid of unexpected output afterward
    exit();
}