这篇来整理一下最近开发项目时，发现有不少可以复用的方法。
不全然都是使用 WordPress 内建提供的方法，有时候会是在非 WordPress 安装的环境验证算法与操作，效率更高。
之后有常用的方法就来更新这篇~
需要网络爬存数据（API请求）
function mxp_do_request(string $url, string $type = 'GET', array $headers = [], array $post_fields = [], string $user_agent = '', string $referrer = '', bool $follow = true, bool $use_ssl = false, int $con_timeout = 10, int $timeout = 40) {
$crl = curl_init($url);
curl_setopt($crl, CURLOPT_CUSTOMREQUEST, $type);
curl_setopt($crl, CURLOPT_USERAGENT, $user_agent);
curl_setopt($crl, CURLOPT_REFERER, $referrer);
if ($type == 'POST') {
curl_setopt($crl, CURLOPT_POST, true);
if (!empty($post_fields)) {
curl_setopt($crl, CURLOPT_POSTFIELDS, $post_fields);
}
}
if (!empty($headers)) {
curl_setopt($crl, CURLOPT_HTTPHEADER, $headers);
}
curl_setopt($crl, CURLOPT_FOLLOWLOCATION, $follow);
curl_setopt($crl, CURLOPT_CONNECTTIMEOUT, $con_timeout);
curl_setopt($crl, CURLOPT_TIMEOUT, $timeout);
curl_setopt($crl, CURLOPT_SSL_VERIFYHOST, $use_ssl);
curl_setopt($crl, CURLOPT_SSL_VERIFYPEER, $use_ssl);
curl_setopt($crl, CURLOPT_ENCODING, 'gzip,deflate');
curl_setopt($crl, CURLOPT_RETURNTRANSFER, true);
$call_response = curl_exec($crl);
curl_close($crl);
return $call_response; //Return data
}
上面是PHP cURL实作的版本，下方则是套用WordPress内建方法的改版，同样参数，替换实作内容就可以无缝切入。
function mxp_do_request(string $url, string $type = 'GET', array $headers = [], array $post_fields = [], string $user_agent = '', string $referrer = '', bool $follow = true, bool $use_ssl = false, int $con_timeout = 10, int $timeout = 40) {
$args = array(
'method' => $type,
'timeout' => $timeout,
'redirection' => 5,
'httpversion' => '1.1',
'blocking' => true,
'sslverify' => $use_ssl,
'headers' => [
'User-Agent' => $user_agent,
'Referer' => $referrer,
],
'body' => $post_fields,
);
if (!empty($headers) && count($headers) != 0) {
foreach ($headers as $key => $header) {
$args['headers'][$key] = $header;
}
}
$response = wp_remote_request($url, $args);
$body = wp_remote_retrieve_body($response);
return $body;
}
下载文件
cURL 简易的下载文件方式，适用下载档案资源路径（URL）包含文件名称与档案类型（MIME Type）明确不带其他 Query String 的作法
function mxp_download_source($url, $name) {
$name_path = $name;
$suffix = end(explode('.', $url));
$file_name = dirname(__FILE__) . "/" . $name_path . "." . $suffix;
if (file_exists($file_name)) {
return $file_name;
}
$fp = fopen($file_name, 'w+');
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_FILE, $fp);
$data = curl_exec($ch);
curl_close($ch);
fclose($fp);
fputs($fp, $data);
fclose($fp);
return $file_name;
}
下载压缩格式的档案，并解压缩.gz
function mxp_download_source($url) {
$path = basename(parse_url($url, PHP_URL_PATH));
$file_name = dirname(__FILE__) . "/" . $path;
$buffer_size = 4096; // read 4kb at a time
$out_file_name = str_replace('.gz', '', $file_name);
if (file_exists($out_file_name)) {
return $out_file_name;
}
$fp = fopen($file_name, 'w');
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_FILE, $fp);
$data = curl_exec($ch);
curl_close($ch);
fclose($fp);
$file = gzopen($file_name, 'rb');
$out_file = fopen($out_file_name, 'wb');
while (!gzeof($file)) {
fwrite($out_file, gzread($file, $buffer_size));
}
fclose($out_file);
gzclose($file);
unlink($file_name);
return $out_file_name;
}
算文本文件总行数（适用大文件）
//https://stackoverflow.com/questions/2162497/efficiently-counting-the-number-of-lines-of-a-text-file-200mb $file = new SplFileObject($source_file); $file->seek(PHP_INT_MAX); $total_lines = $file->key() + 1;
照行数读取文字档案内容
$file = new SplFileObject($filename);
$line = '';
$file_number = get_total_lines($filename);
$left_items = $file_number % 5000;
for ($i = 1; $i <= $file_number; ++$i) {
if (!$file->eof()) {
//https://stackoverflow.com/questions/5775452/php-read-specific-line-from-file
$file->seek($i);//帶入行號
$line = $file->current();//取得該行內容
}
}
下载远程图片并上传 WordPress 媒体库与加入文章精选图片
function mxp_download_and_insert_wp($link = '', $author_id = 1, $post_parent = 0, $att_title = '', $att_content = '', $set_post_thumbnail = true) {
if ($link == '') {
return false;
}
require_once ABSPATH . 'wp-admin/includes/media.php';
require_once ABSPATH . 'wp-admin/includes/file.php';
require_once ABSPATH . 'wp-admin/includes/image.php';
$filename = basename(parse_url($link, PHP_URL_PATH));
$options = array('timeout' => 300);
$upload_file = null;
$response = wp_safe_remote_get($link, $options);
if (!is_wp_error($response)) {
$data = wp_remote_retrieve_body($response);
$upload_file = wp_upload_bits($filename, null, $data);
} else {
return false;
}
$wp_filetype = wp_check_filetype($filename, null);
$attachment = array(
'post_mime_type' => $wp_filetype['type'],
'post_parent' => $post_parent,
'post_author' => $author_id,
'post_title' => preg_replace('/\.[^.]+$/', '', $att_title),
'post_content' => $att_content,
'post_status' => 'inherit',
);
$attachment_id = wp_insert_attachment($attachment, $upload_file['file'], $post_parent);
if (!is_wp_error($attachment_id)) {
//產生附加檔案中繼資料
$attachment_data = wp_generate_attachment_metadata($attachment_id, $upload_file['file']);
wp_update_attachment_metadata($attachment_id, $attachment_data);
//將圖像的附加檔案設為特色圖片
$type = explode("/", $wp_filetype['type']);
if ($set_post_thumbnail && $type[0] == 'image') {
set_post_thumbnail($post_parent, $attachment_id);
}
return true;
} else {
return false;
}
}
这个方法我这样写应该算是很 WordPress 的原生处理方式了，网络上还有其他网友分享的方法也可以参考： Gist： Upload an image to WordPress media gallery from URL
