SplStream

資源流數(shù)據(jù)操作

相關(guān)class位置

• SplStream
  • namespace: EasySwoole\Spl\SplStream

SplStream相關(guān)方法

基本使用

<?php
/**
 * Created by PhpStorm.
 * User: root
 * Date: 19-7-2
 * Time: 上午10:25
 */

require_once 'vendor/autoload.php';

//初始化資源和讀寫操作
$resource = fopen('./test.txt', 'ab+');
$stream = new \EasySwoole\Spl\SplStream($resource);
var_dump($stream->__toString());

/**
 * 輸出結(jié)果過：
 * string(10) "Easyswoole"
 */

//輸出資源
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
var_dump($stream->__toString());
/**
 * 輸出結(jié)果過：
 * string(10) "Easyswoole"
 */

//關(guān)閉一個打開的文件指針
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->close();
var_dump($stream->__toString());

/**
 * 輸出結(jié)果過：
 * string(0) ""
 */

//獲取資源并重置資源對象
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->detach();
var_dump($stream->__toString());

/**
 * 輸出結(jié)果過：
 * string(0) ""
 */

//獲取資源大小
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$size = $stream->getSize();
var_dump($size);

/**
 * 輸出結(jié)果過：
 * int(10)
 */

//返回文件指針讀/寫的位置
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$position = $stream->tell();
var_dump($position);

/**
 * 輸出結(jié)果過：
 * int(10)
 */

//文件指針是否到了文件結(jié)束的位置
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$eof = $stream->eof();
var_dump($eof);
$stream->detach();
$eof = $stream->eof();
var_dump($eof);

/**
 * 輸出結(jié)果過：
 * bool(false)
 * bool(true)
 */

//獲取是否可以在當(dāng)前流中定位
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$seekable = $stream->isSeekable();
var_dump($seekable);

/**
 * 輸出結(jié)果過：
 * bool(true)
 */

//在文件指針中定位
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->seek(2);
$position = $stream->tell();
var_dump($position);

/**
 * 輸出結(jié)果過：
 * int(2)
 */

//倒回文件指針的位置
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->rewind();
$position = $stream->tell();
var_dump($position);

/**
 * 輸出結(jié)果過：
 * int(0)
 */

//是否可寫
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$writeAble = $stream->isWritable();
var_dump($writeAble);

/**
 * 輸出結(jié)果過：
 * bool(true)
 */

//寫入內(nèi)容
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->write(', 666');
var_dump($stream->__toString());

/**
 * 輸出結(jié)果過：
 * string(15) "Easyswoole, 666"
 */

//是否可讀
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$readAble = $stream->isReadable();
var_dump($readAble);

/**
 * 輸出結(jié)果過：
 * bool(true)
 */

//讀取內(nèi)容
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->rewind();
$string = $stream->read(4);
var_dump($string);

/**
 * 輸出結(jié)果過：
 * string(4) "Easy"
 */

//讀取資源流到一個字符串
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->rewind();
$string = $stream->getContents();
var_dump($string);

/**
 * 輸出結(jié)果過：
 * string(10) "Easyswoole"
 */

//從封裝協(xié)議文件指針中取得報頭／元數(shù)據(jù)
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$meta = $stream->getMetadata();
var_dump($meta['stream_type']);

/**
 * 輸出結(jié)果過：
 * string(6) "MEMORY"
 */

//獲取資源
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$resource = $stream->getStreamResource();
fseek($resource, 0, SEEK_SET);
var_dump(stream_get_contents($resource));

/**
 * 輸出結(jié)果過：
 * string(10) "Easyswoole"
 */

//將文件截斷到給定的長度
$stream = new \EasySwoole\Spl\SplStream('Easyswoole');
$stream->truncate(4);
var_dump($stream->__toString());

/**
 * 輸出結(jié)果過：
 * string(4) "Easy"
 */