解决调用未定义 swoole_async_readfile函数问题

大家好，又见面了，我是全栈君。

[root@vagrant-centos7 server]# php read.php 
PHP Fatal error:  Uncaught Error: Call to undefined function swoole_async_readfile() in /home/wwwroot/default/newproject/swoolechat/swoole-src/examples/server/read.php:13
Stack trace:
#0 {main}
  thrown in /home/wwwroot/default/newproject/swoolechat/swoole-src/examples/server/read.php on line 13

Fatal error: Uncaught Error: Call to undefined function swoole_async_readfile() in /home/wwwroot/default/newproject/swoolechat/swoole-src/examples/server/read.php:13
Stack trace:
#0 {main}
  thrown in /home/wwwroot/default/newproject/swoolechat/swoole-src/examples/server/read.php on line 13

解答:

https://github.com/swoole/swoole-src/issues/2439

https://segmentfault.com/q/1010000018413486?sort=created

https://wiki.swoole.com/wiki/page/p-async.html

4.3的版本移除所有异步模块, 分离异步扩展到 async-ext 移除的异步模块如下:

从4.3版本开始需要额外安装swoole-async扩展才能使用异步模块
不要直接拉取 master 代码进行编译，请使用和 swoole 版本对应的 ext-async 的 release 版本https://github.com/swoole/ext-async/releases

Async系列函数
MySQL
Redis
HttpClient
MemoryPool
MsgQueue
RingQueue

如何才能解决这个问题呢？

使用协程替换，或者安装async-ext扩展https://github.com/swoole/ext-async

因为我的swoole版本为Version => 4.5.0-alpha 而最新的async-ext扩展版本为v4.4.14, 所以只能卸载swoole重新编译.

卸载参考:

https://blog.csdn.net/zhangzeshan/article/details/102568239

https://blog.csdn.net/lxw1844912514/article/details/103915055

安装好后:

解决问题:

read.php文件:

<?php
/**
 * 异步读取文件
 *User: lxw
 *Date: 2020-01-20
 */

swoole_async_readfile(__DIR__ . '/1.txt',function ($filename, $fileContent){
    echo "filename:".$filename.PHP_EOL;
    echo "fileContent:".$fileContent.PHP_EOL;
    echo '内部start:'.time().PHP_EOL;
});

echo '外部start:'.time().PHP_EOL;

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