我正在尝试进行一些计算并下载结果，为此我使用了标题，但结果非常大，而且我遇到了内存问题。
以下是我的代码标头代码：
function download_send_headers($filename) {
// disable caching
$now = gmdate("D, d M Y H:i:s");
header("Expires: Tue, 03 Jul 2020 06:00:00 GMT");
header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate");
header("Last-Modified: {$now} GMT");
// force download
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
// disposition / encoding on response body
header("Content-Disposition: attachment;filename={$filename}");
header("Content-Transfer-Encoding: binary");
}
这就是我遇到问题的地方：
$export_model->download_send_headers('tainacan_csv.csv');
foreach($objects as $object)
{
$csv_data = $export_model->generate_csv_data($data, $object);
echo utf8_decode($export_model->array2csv($csv_data, $data['socialdb_delimiter_csv']));
}
更多代码，我逐行改变了我的方法，即便如此，我也遇到了内存问题。这是生成de CSV的代码。
public function generate_csv_data($data) {
$df = fopen("php://output", 'w');
$propertyModel = new PropertyModel;
$objects = $this->get_collection_posts($data['collection_id']);
$facets = CollectionModel::get_facets($data['collection_id']);
//fputcsv($df, array_keys(reset($objects)), $data['socialdb_delimiter_csv']);
foreach ($objects as $object) {
$csv_data = [];
if ($object->ID == $data['collection_id']) {
continue;
}
/** ID * */
if ($object->ID != "") {
$csv_data['ID'] = $object->ID;
}
/** Title * */
if ($object->post_title != "") {
$value = $object->post_title;
if(mb_detect_encoding($value)==='UTF-8'){
$value = utf8_decode($value);
}
$csv_data['title'] = $value;
} else {
$csv_data['title'] = '';
}
/** Description * */
if ($object->post_content != "") {
$value = $object->post_content;
if(mb_detect_encoding($value)==='UTF-8'){
$value = utf8_decode($value);
}
$csv_data['description'] = $value;
} else {
$csv_data['description'] = '';
}
/** Content * */
if (get_post_meta($object->ID, 'socialdb_object_content', true) != "") {
$csv_data['content'] = utf8_decode(get_post_meta($object->ID, 'socialdb_object_content', true));
if ($csv_data['content'] != '' && is_numeric($csv_data['content'])) {
$csv_data['content'] = wp_get_attachment_url($csv_data['content']);
}
} else {
$csv_data['content'] = '';
}
/** Origin * */
if (get_post_meta($object->ID, 'socialdb_object_from')) {
$csv_data['item_from'] = get_post_meta($object->ID, 'socialdb_object_from', true);
}
/** Type * */
if (get_post_meta($object->ID, 'socialdb_object_dc_type')) {
$csv_data['item_type'] = get_post_meta($object->ID, 'socialdb_object_dc_type', true);
}
/** Source * */
if (get_post_meta($object->ID, 'socialdb_object_dc_source')) {
$value = get_post_meta($object->ID, 'socialdb_object_dc_source', true);
if(mb_detect_encoding($value)==='UTF-8'){
$value = utf8_decode($value);
}
$csv_data['item_source'] = $value;
}
/** URL * */
if (get_post_meta($object->ID, 'socialdb_uri_imported')) {
$csv_data['permalink'] = get_post_meta($object->ID, 'socialdb_uri_imported', true);
} else {
$csv_data['permalink'] = get_the_permalink($data['collection_id']) . '?object_id=' . $object->ID;
}
/** Tags * */
$tags = wp_get_object_terms($object->ID, 'socialdb_tag_type', array('fields' => 'names'));
if (!empty($tags)) {
$csv_data['tags'] = utf8_decode(implode('||', $tags));
} else {
$csv_data['tags'] = '';
}
/** Categories * */
$categories_of_facet = array();
$category_model = new CategoryModel;
$categories = wp_get_object_terms($object->ID, 'socialdb_category_type');
if (is_array($categories)):
foreach ($categories as $category) {
$facet_id = $category_model->get_category_facet_parent($category->term_id, $data['collection_id']);
if (!isset($facet_id) || $facet_id == $category->term_id) {
continue;
}
$categories_of_facet[$facet_id][] = $this->get_hierarchy_names($category->term_id, $facet_id);
}
endif;
if ($facets) {
foreach ($facets as $facet) {
$term = get_term_by('id', $facet, 'socialdb_category_type');
if (is_array($categories_of_facet[$facet])):
$csv_data[utf8_decode($term->name)] = utf8_decode(implode(', ', $categories_of_facet[$facet]));
else:
$csv_data[utf8_decode($term->name)] = '';
endif;
}
}
/** Propriedades de Atributos * */
$root_category = $this->get_category_root_of($data['collection_id']);
//$all_properties_id = get_term_meta($root_category, 'socialdb_category_property_id');
$all_properties_id = array_unique($this->get_parent_properties($root_category, [], $root_category));
if ($all_properties_id) {
foreach ($all_properties_id as $property_id) {
$property = get_term_by("id", $property_id, "socialdb_property_type");
if (in_array($property->slug, $this->fixed_slugs)):
continue;
endif;
$type = $propertyModel->get_property_type($property_id); // pego o tipo da propriedade
if ($type == 'socialdb_property_data') {
$value = get_post_meta($object->ID, 'socialdb_property_' . $property_id, true);
if(mb_detect_encoding($value)==='UTF-8'){
$value = utf8_decode($value);
}
$csv_data[utf8_decode($property->name)] = get_post_meta($object->ID, 'socialdb_property_' . $property_id, true);
} elseif ($type == 'socialdb_property_object') {
$property_result_meta_value = get_post_meta($object->ID, 'socialdb_property_' . $property_id);
if (is_array($property_result_meta_value) && $property_result_meta_value[0] != '') {
foreach ($property_result_meta_value as $property_meta_value) {
$array_property_name[] = get_post($property_meta_value)->post_title;
}
$csv_data[utf8_decode($property->name)] = utf8_decode(implode(', ', $array_property_name));
} else {
$csv_data[utf8_decode($property->name)] = '';
}
}
}
$array_property_name = [];
}
/** Arquivos * */
$array_files = $this->list_files_to_export($object->ID);
if ($array_files) {
$csv_data['Files'] = implode(', ', $array_files);
} else {
$csv_data['Files'] = '';
}
/** * ************************** */
//$csv[] = $csv_data;
fputcsv($df, $csv_data, $data['socialdb_delimiter_csv']);
unset($csv_data);
}
fclose($df);
//return $csv;
}
答案 0 :(得分：1)
你可以改变内存限制：ini_set();，如下所示：
tags$head(
tags$a(class="logo", target="_blank",
href="http://link.com/")
)
编辑： 我同意@apokryfos。如果您想要更详细的解决方案，我们需要更多代码。