# ZipArchive::registerCancelCallback

(PHP >= 8.0.0, PECL zip >= 1.17.0)

ZipArchive::registerCancelCallback — Register a callback to allow cancellation during archive close.

### 说明

public ZipArchive::registerCancelCallback(callable `$callback`): bool

Register a `callback` function to allow cancellation during archive close.

### 参数

`callback`

  If this function return 0 operation will continue, other value it will be cancelled.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 示例

This example creates a ZIP file archive php.zip and cancel operation on some run condition.

示例 #1 Archive a file

`<?php
$zip = new ZipArchive();
if ($zip->open('php.zip', ZipArchive::CREATE | ZipArchive::OVERWRITE)) {
$zip->addFile(PHP_BINARY, 'php');
$zip->registerCancelCallback(function () {
return ($someruncondition ? -1 : 0);
});
$zip->close();
}`

### 注释

> 注意:

> This function is only available if built against libzip ≥ 1.6.0.

### 参见

- ZipArchive::registerProgressCallback() - Register a callback to provide updates during archive close.

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