Example of php multi-threaded pipe communication

This article introduces examples of pipeline communication in multi-threaded programming in PHP for reference by friends in need.

php multi-threading implements pipeline communication, the code is as follows:

<?php
/*
管道通信：
1. 管道可以认为是一个队列，不同的线程都可以往里面写东西，也都可以从里面读东西。写就是
在队列末尾添加，读就是在队头删除。
 
2. 管道一般有大小，默认一般是4K，也就是内容超过4K了，你就只能读，不能往里面写了。
 
3. 默认情况下，管道写入以后，就会被阻止，直到读取他的程序读取把数据读完。而读取线程也会被阻止，
   直到有进程向管道写入数据。当然，你可以改变这样的默认属性，用stream_set_block  函数，设置成非阻断模式。
 
一个封装好的管道类。
*/
class Pipe
{
    public  $fifoPath;
    private $w_pipe;
    private $r_pipe;

    /**
     * 自动创建一个管道
     *
     * @param string $name 管道名字
     * @param int $mode  管道的权限，默认任何用户组可以读写
     */
    function __construct($name = 'pipe', $mode = 0666)
    {
        $fifoPath = "/tmp/$name." . posix_getpid();
        if (!file_exists($fifoPath)) {
            if (!posix_mkfifo($fifoPath, $mode)) {
                error("create new pipe ($name) error.");
                return false;
            }
        } else {
            error( "pipe ($name) has exit.");
            return false;
        }
        $this->fifoPath = $fifoPath;
    }
   //  写管道函数开始
   function open_write()
    {
        $this->w_pipe = fopen($this->fifoPath, 'w');
        if ($this->w_pipe == NULL) {
            error("open pipe {$this->fifoPath} for write error.");
            return false;
        }
        return true;
    }
 
    function write($data)
    {
        return fwrite($this->w_pipe, $data);
    }

    function write_all($data)
    {
        $w_pipe = fopen($this->fifoPath, 'w');
        fwrite($w_pipe, $data);
        fclose($w_pipe);
    }

    function close_write()
    {
        return fclose($this->w_pipe);
    }
/// 读管道相关函数开始
function open_read()
    {
        $this->r_pipe = fopen($this->fifoPath, 'r');
        if ($this->r_pipe == NULL) {
            error("open pipe {$this->fifoPath} for read error.");
            return false;
        }
        return true;
    }

    function read($byte = 1024)
    {
        return fread($this->r_pipe, $byte);
    }

    function read_all()
    {
        $r_pipe = fopen($this->fifoPath, 'r');
        $data = '';
        while (!feof($r_pipe)) {
            //echo "read one K\n";
            $data .= fread($r_pipe, 1024);
        }
        fclose($r_pipe);
        return $data;
    }

    function close_read()
    {
        return fclose($this->r_pipe);
    }
    /**
     * 删除管道
     *
     * @return boolean is success
     */
    function rm_pipe()
    {
        return unlink($this->fifoPath);
    }
}
/*
此类实现简单的管道通信*/
?>

For the implementation method of multi-threading in php, please refer to the following article: Understand the wonderful use of php multi-threading php code sharing for multi-threaded web crawling php multi-threading (without fork) example sharing php multi-threaded code sharing Example of php supporting multi-threaded download