您可以像正常的PHP/Wordpress文件上载一样上载图像。

参考=> wp_handle_upload

$mimes = array(
    \'bmp\'  => \'image/bmp\',
    \'gif\'  => \'image/gif\',
    \'jpe\'  => \'image/jpeg\',
    \'jpeg\' => \'image/jpeg\',
    \'jpg\'  => \'image/jpeg\',
    \'png\'  => \'image/png\',
    \'tif\'  => \'image/tiff\',
    \'tiff\' => \'image/tiff\'
);

$overrides = array(
    \'mimes\'     => $mimes,
    \'test_form\' => false
);

$upload = wp_handle_upload( $_FILES[\'YOUR_INPUT_FILE_NAME_HERE\'], $overrides );
remove_filter( \'upload_dir\', array($this, \'change_upload_dir\') );
if ( isset( $upload[\'error\'] ) ){
    // SOME UPLOAD ERROR OCCURED
} else {
    // File uploaded successfully. 
    $uploadedFileURL = $upload[\'url\'];
    $uploadedFileName = basename($upload[\'url\']);
}