# deflate_add

(PHP 7, PHP 8)

deflate_add — Incrementally deflate data

### Descripción

deflate_add(DeflateContext `$context`, string `$data`, int `$flush_mode` = `ZLIB_SYNC_FLUSH`): string|false

Incrementally deflates data in the specified context.

### Parámetros

`context`

  A context created with deflate_init().

`data`

  A chunk of data to compress.

`flush_mode`

  One of `ZLIB_BLOCK`, `ZLIB_NO_FLUSH`, `ZLIB_PARTIAL_FLUSH`, `ZLIB_SYNC_FLUSH` (default), `ZLIB_FULL_FLUSH`, `ZLIB_FINISH`. Normally you will want to set `ZLIB_NO_FLUSH` to maximize compression, and `ZLIB_FINISH` to terminate with the last chunk of data. See the » zlib manual for a detailed description of these constants.

### Valores devueltos

Returns a chunk of compressed data, o `false` en caso de error.

### Errores/Excepciones

If invalid arguments are given, an error of level `E_WARNING` is generated.

### Historial de cambios

Versión | Descripción
--- | ---
8.0.0 | `context` expects a DeflateContext instance now; previously, a resource was expected.

### Ver también

- deflate_init() - Initialize an incremental deflate context