(PHP 5, PHP 7 < 7.4.0)
fbird_blob_cancel — Cancel creating blob
$blob_handle
This function will discard a BLOB if it has not yet been closed by fbird_blob_close().
blob_handle
A BLOB handle opened with fbird_blob_create().
成功时返回 true， 或者在失败时返回 false。
true
false