PHP中的共享内存文件

| 我使用openssl_pkcs7_sign和openssl_pkcs7_encrypt创建加密数据。这些功能仅接受文件名。我想将临时文件存储在共享内存中以提高性能。我了解在Linux中我可以2英镑，但Windows则不可能。 PHP中有可移植的方式来做到这一点吗？ shmop_函数在这里有帮助吗？谢谢。 PS：还是有办法使这些函数接受数据字符串？ PS2：请不要建议从PHP调用/usr/bin/openssl。它不是便携式的。

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2 个回复

赣借

从Windows 2000开始，提供了shmop（以前是shm_）方法。 shmop_open使用唯一的整数键共享存储区。 ftok可用于根据文件路径（通常是脚本文件的完整路径）生成唯一索引。共享相同密钥的任何实例都可以共享相同的内存。 http://php.net/manual/zh/ref.shmop.php 在Zend Server CE的PHP版本5.3.3上进行了测试系统Windows NT CRYPE 6.1内部版本7601（未知Windows版本Business Edition Service Pack 1）i586

<?php
$key = ftok(__FILE__, \'t\');
$memory = shmop_open($key, \"c\", 0600, 16 * 1024);
$data = array(\'data\' => \'value\');
$bytes = shmop_write($memory, serialize($data), 0);
$return = shmop_read($memory, 0, $bytes);
print_r(unserialize($return));
?>

shmop_read/shmop_write会存储字符串中的原始字节，因此您无需序列化它，但是您需要将字符串的长度写在某个地方。我的示例创建了一个16KB的共享内存区域，您当然可以调整它的大小以适合openssl文件以及存储文件大小所需的空间。

械怒等

好的，所以我建议这样做的方法是使用文件流包装器。让我举一个简单的例子：

class staticStreamWrapper {
    public $context;
    protected static $data = array();

    protected $path    = \'\';
    protected $pointer = 0;
    protected $writable = false;

    public function stream_close() {}

    public function stream_eof() {
        return $this->pointer >= strlen(static::$data[$this->path]);
    }

    public function stream_flush() {}

    public function stream_open($path, $mode, $options, &$opened_path) {
        switch ($mode[0]) {
            case \'r\':
                if (!isset(static::$data[$path])) return false;
                $this->path = $path;
                $this->writable = isset($mode[1]) && $mode[1] == \'+\';
                break;
            case \'w\':
                static::$data[$path] = \'\';
                $this->path = $path;
                $this->writable = true;
                break;
            case \'a\':
                if (!isset(static::$data[$path])) static::$data[$path] = \'\';
                $this->path = $path;
                $this->writable = true;
                $this->pointer = strlen(static::$data[$path]);
                break;
            case \'x\':
                if (isset(static::$data[$path])) return false;
                $this->path = $path;
                $this->writable = true;
                break;
            case \'c\':
                if (!isset(static::$data[$path])) static::$data[$path] = \'\';
                $this->path = $path;
                $this->writable = true;
                break;
            default:
                return false;
        }
        $opened_path = $this->path;
        return true;
    }

    public function stream_read($count) {
        $bytes = min(strlen(static::$data[$this->path]) - $this->pointer, $count);
        $data = substr(static::$data[$this->path], $this->pointer, $bytes);
        $this->pointer += $bytes;
        return $data;
    }

    public function stream_seek($offset, $whence = SEEK_SET) {
        $len = strlen(static::$data[$this->path]);
        switch ($whence) {
            case SEEK_SET:
                if ($offset <= $len) {
                    $this->pointer = $offset;
                    return true;
                }
                break;
            case SEEK_CUR:
                if ($this->pointer + $offset <= $len) {
                    $this->pointer += $offset;
                    return true;
                }
                break;
            case SEEK_END:
                if ($len + $offset <= $len) {
                    $this->pointer = $len + $offset;
                    return true;
                }
                break;
        }
        return false;
    }

    public function stream_stat() {
        $size = strlen(static::$data[$this->path]);
        $time = time();
        return array(
            0 => 0,
            \'dev\' => 0,
            1 => 0,
            \'ino\' => 0,
            2 => 0777,
            \'mode\' => 0777,
            3 => 1,
            \'nlink\' => 1,
            4 => 0,
            \'uid\' => 0,
            5 => 0,
            \'gid\' => 0,
            6 => \'\',
            \'rdev\' => \'\',
            7 => $size,
            \'size\' => $size,
            8 => $time,
            \'atime\' => $time,
            9 => $time,
            \'mtime\' => $time,
            10 => $time,
            \'ctime\' => $time,
            11 => -1,
            \'blksize\' => -1,
            12 => -1,
            \'blocks\' => -1,
        );
    }

    public function stream_tell() {
        return $this->pointer;
    }

    public function stream_write($data) {
        if (!$this->writable) return 0;
        $size = strlen($data);
        $len = strlen(static::$data[$this->path]);
        if ($this->stream_eof()) {
            static::$data[$this->path] .= $data;
        } else {
            static::$data[$this->path] = substr_replace(
                static::$data[$this->path],
                $data,
                $this->pointer
            );
        }
        $this->pointer += $size;
        return $size;
    }

    public function unlink($path) {
        if (isset(static::$data[$path])) {
            unset(static::$data[$path]);
        }
        return true;
    }

}

现在，您将需要注册包装器：

stream_wrapper_register(\'static\', \'staticStreamWrapper\');

因此，即使它实际上从未离开过PHP（它作为静态变量存储），您现在也可以将其视为文件！

file_put_contents(\'static://foo.txt\', \'this is my data\');
file_get_contents(\'static://foo.txt\'); // \"this is my data\"
$f = fopen(\'static://foo.txt\', \'r\'); // should return a resource
// etc...

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PHP中的共享内存文件

2 个回复

发起人

windows

file

shared_memory

php

问题状态

PHP中的共享内存文件

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2 个回复

发起人

windows

file

shared_memory

php

问题状态