在项目中,碰到一个解析流的操作,php里面没有现成的类.
那没办法,只能用二进制模式打开文件,再和java的datainputstream对比着打开文件,一个一个的实现流读取和解析.
废话不多说,代码贴出,其实很简单很简单.
DataInputStream.php
<?php /** * 流解析 * --------------------------------------------- * @Author: Simon 夏向红 sanwkj@163.com * @Date: 2012-02-22 * @package cn.com.nearme.gostore.theme * @name :DataInputStream.php * @version v1.0 * */ class DataInputStream { private $stream = null; /** * 构造函数 * * @param stream of fopen .. $in */ public function __construct( $in ){ $this->stream = $in; } /** * 析构函数 * */ public function __destruct(){ @fclose( $this->stream ); } /** * 读取字节 * * @param int sizeof you want to read $len * @return string */ private function read( $len=1 ){ $len = intval( $len ); if( $len>0 ) { if( !feof( $this->stream ) ) { $read = @fread($this->stream,$len); if( strlen($read)!=$len ){ throw new Exception('流文件已经到末尾,读取错误',222); } else { return $read; } } else { throw new Exception('流文件已经到末尾,读取错误',222); } } else { return ''; } } /** * 读取一个字节,并转换成int * * @return int */ public function readByte(){ return hexdec(bin2hex($this->read(1))); } /** * 短整形 * * @return int */ public function readShort(){ return hexdec(bin2hex($this->read(2))); } /** * 整形数据 * * @return int */ public function readInt(){ return hexdec(bin2hex($this->read(4))); } /** * 读取一个字符串 * * @return string */ public function readUTF(){ $len = $this->readShort(); return $this->read($len); } /** * 读取指定长度的数据,并作为字符串返回,图片等二进制文件,可能需要这样读取. * * @param int $len * @return unknown */ public function readFully( $len ) { return $this->read( $len ); } /** * readUTF的别名 * * @return unknown */ public function readString(){ return $this->readUTF(); } /** * 长整形. * * @return unknown */ public function readLong(){ return hexdec(bin2hex($this->read(8))); } } ?>

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