Php 如何在提交后启动文件下载
我有一个重力表单,用户可以在其中设置复选框来选择要下载的文件。对于增强的UX,表单是多页的,并使用AJAX 使用下面的PHP函数和Gravity Forms钩子,我可以循环选择复选框并将文件添加到ZIP存档中,但目前无法开始下载Php 如何在提交后启动文件下载,php,jquery,ajax,wordpress,gravity-forms-plugin,Php,Jquery,Ajax,Wordpress,Gravity Forms Plugin,我有一个重力表单,用户可以在其中设置复选框来选择要下载的文件。对于增强的UX,表单是多页的,并使用AJAX 使用下面的PHP函数和Gravity Forms钩子,我可以循环选择复选框并将文件添加到ZIP存档中,但目前无法开始下载 add_filter( 'gform_after_submission_3', 'download_brochures_message', 10, 4 ); function download_brochures_message( $entry ) { $confir
add_filter( 'gform_after_submission_3', 'download_brochures_message', 10, 4 );
function download_brochures_message( $entry ) {
$confirmation = "Your download should begin shortly. \r\n";
$error = "Files not set \r\n";
$file1 = rgar( $entry, '1.1' );
$file2 = rgar( $entry, '1.2' );
$file3 = rgar( $entry, '1.3' );
$file4 = rgar( $entry, '1.4' );
$files = array(
$file1,
$file2,
$file3,
$file4
);
print_r($files);
$zip = new ZipArchive();
$current_time = time();
$file_folder = wp_upload_dir();
$dir = $file_folder['path'];
$zip_file = tempnam( $dir, time() );
$zip->open( $zip_file, ZipArchive::CREATE );
foreach ($files as $file) {
$zip->addFile($file);
}
$zip->close();
echo $zip_file;
header('Content-disposition: attachment; filename="'.$zip_name.'"');
header('Content-type: application/zip');
header('Content-Length: ' . filesize($zip_file));
header("Location: $zip_file");
readfile($zip_file);
}
由于表单是通过AJAX提交的,页面标题已经发送,我收到的PHP错误是“无法修改标题信息-标题已经发送”。如何修改此代码以允许zip下载?要实现一个完全有效的解决方案,需要PHP后端函数根据发布的表单值创建zip,并使用少量JavaScript启动下载 PHP:
/**
* Function to force file download based on user selected checkboxes.
*/
add_filter( 'gform_confirmation_{your-form-id}', 'get_chosen_brochures', 10, 4 );
function get_chosen_brochures( $confirmation, $form, $entry, $ajax ) {
$brochures = retrieve_brochure_data( $entry );
$confirmation = start_brochures_download( $brochures );
return $confirmation;
}
function retrieve_brochure_data( $entry ){
$radio_value_1 = rgar( $entry, '1.1' );
$radio_value_2 = rgar( $entry, '1.2' );
$radio_value_3 = rgar( $entry, '1.3' );
$radio_value_4 = rgar( $entry, '1.4' );
return array(
$radio_value_1,
$radio_value_2,
$radio_value_3,
$radio_value_4
);
}
function start_brochures_download( $brochures ) {
$files = $brochures;
$error = "Files not set";
$success = "Thank you. Your download will being shortly.";
if( $files ) {
$zip = new ZipArchive();
$current_time = time();
$file_name = "Archive-Name-".$current_time.".zip";
$file_folder = wp_upload_dir();
$dir = $file_folder['path'];
$url = $file_folder['url'];
$zip_file = $dir.'/'.$file_name;
$zip_url = $url.'/'.$file_name;
$zip->open( $zip_file, ZipArchive::CREATE );
foreach ($files as $key => $file) {
if( !empty($file) ){
# download file
$download_file = file_get_contents($file);
#add it to the zip
$zip->addFromString(basename($file), $download_file);
}
$error .= "\n *File $key is empty";
}
$zip->close();
return $success . " If your download doesn't begin automatically, you can click <a id='generated-download-link' href='{$zip_url}'>here to start the download</a>.";
} else {
return $error;
}
}
$(document).bind('gform_confirmation_loaded', function(event, formId){
if( formId === 3 ){
var download_url = $("#generated-download-link").attr('href');
if(download_url) {
var delay = 2000;
setTimeout( function(){ window.location = download_url; }, delay );
}
}
});
我对初始代码的最大问题是在页面加载后无法更改页面标题。这是使用AJAX表单的一个限制,但是AJAX是一个需求,因为一些UX流已经就位
要重用此代码,需要将单选按钮或复选框值设置为要下载的文件的URL 你有没有找到解决办法?我也试着这么做thing@ConorBaumgart是的,我最终找到了一个解决方案,我会很快给你一个答案。完全忘记了我发布了这个问题,因为它没有看到任何活动@康诺鲍姆加特嘿,伙计,我已经把我的答案/解决方案贴在下面了!还有$radio_value_1=rgar($entry,'1.1');应替换为字段ID。如果字段ID为4,则它将为$radio_value_1=rgar($entry,'4.1');然后是4.2等等