javascript–在WordPressAdmin中从PHP数组创建“下载到CSV”按钮

我已经使用函数填充了一个多维PHP数组,我希望允许我的管理员用户下载内容.

我找到了一个PHP函数,它允许我将数组导出为CSV并将其放在我的functions.php中,使用第二个函数将其挂钩到AJAX并使用jQuery来激活AJAX函数.

有什么问题？

所以我99％肯定AJAX正确发布到PHP函数,但由于某种原因下载没有启动.

我已经研究了很多,但很难找到解决方案 – 真的很欣赏正确方向的一点！

// Function to generate download
function convert_to_csv( $input_array, $output_file_name, $delimiter ) {
/** open raw memory as file, no need for temp files, be careful not to run out of memory thought */
$f = fopen( 'php://memory', 'w' );
/** loop through array */
foreach ( $input_array as $line ) {
/** default php csv handler **/
fputcsv( $f, $line, $delimiter );
}
/** rewrind the "file" with the csv lines **/
fseek( $f, 0 );
/** modify header to be downloadable csv file **/
header( 'Content-Type: application/csv' );
header( 'Content-Disposition: attachement; filename="' . $output_file_name . '";' );
/** Send file to browser for download */
fpassthru( $f );
}


我已经使用另一个函数将它连接到Wordpress AJAX

function laura_function() {
$input_array = $_POST["inputarray"];
convert_to_csv($input_array, 'output.csv', ',');
exit;
}
add_action('wp_ajax_nopriv_ajaxlaurafunction', 'laura_function');
add_action('wp_ajax_ajaxlaurafunction', 'laura_function');


我写了一个小jQuery函数来点击按钮进行AJAX调用

Download CSV

jQuery(document).ready(function () {
jQuery('#downloadcsv').click(function () {
var data = {
action: 'ajaxlaurafunction', // Calls PHP function - note it must be hooked to AJAX
inputarray: '', // Sends a variable to be used in PHP function
};
// This is a shortened version of: https://api.jquery.com/jquery.post/
jQuery.post("", data, function () {
//window.location.replace(location.pathname)
});
});
});


解决方法:

继@charlietfl建议后,我发现“你不能通过Ajax来实现,因为Javascript无法将文件直接保存到用户的计算机上(出于安全考虑).– According to this post”

替代方案

我的替代解决方案是使用’post方法’来设置post参数.

// Form on Page





如果已发布’download_csv’参数,则此代码将运行以下载数据.目前我的代码将输出虚拟数据,但我正在努力.

add_action("admin_init", "download_csv");
function download_csv() {
if (isset($_POST['download_csv'])) {
function outputCsv( $fileName, $assocDataArray ) {
ob_clean();
header( 'Pragma: public' );
header( 'Expires: 0' );
header( 'Cache-Control: must-revalidate, post-check=0, pre-check=0' );
header( 'Cache-Control: private', false );
header( 'Content-Type: text/csv' );
header( 'Content-Disposition: attachment;filename=' . $fileName );
if ( isset( $assocDataArray['0'] ) ) {
$fp = fopen( 'php://output', 'w' );
fputcsv( $fp, array_keys( $assocDataArray['0'] ) );
foreach ( $assocDataArray AS $values ) {
fputcsv( $fp, $values );
}
fclose( $fp );
}
ob_flush();
}
// This is dummy data.
$data = array(
array( 'item' => 'Server', 'cost' => 10000, 'approved by' => 'Joe' ),
array( 'item' => 'Mt Dew', 'cost' => 1.25, 'approved by' => 'John' ),
array( 'item' => 'IntelliJ IDEA', 'cost' => 500, 'approved by' => 'James' ),
);
outputCsv( 'expenses.csv', $data );
exit; // This is really important - otherwise it shoves all of your page code into the download
}
}