php 版本处理类

<code><span><span><?php</span><span>/**
 * 版本处理类，提供版本与数字互相转换，方便入库后进行比较筛选
 *  Date:       2015-06-30
 *  Author:     fdipzone
 *  ver:        1.0
 *
 *  Func:
 *  public  version_to_integer  将版本转为数字
 *  public  integer_to_version  将数字转为版本
 *  public  check               检查版本格式是否正确
 *  public  compare             比较两个版本的值
 */</span><span><span>class</span><span>Version</span>{</span><span>// class start</span><span>/**
     * 将版本转为数字
     *<span> @param</span>  String $version 版本
     *<span> @return</span> Int
     */</span><span>public</span><span><span>function</span><span>version_to_integer</span><span>(<span>$version</span>)</span>{</span><span>if</span>(<span>$this</span>->check(<span>$version</span>)){
            <span>list</span>(<span>$major</span>, <span>$minor</span>, <span>$sub</span>) = explode(<span>'.'</span>, <span>$version</span>);
            <span>$integer_version</span> = <span>$major</span>*<span>10000</span> + <span>$minor</span>*<span>100</span> + <span>$sub</span>;
            <span>return</span> intval(<span>$integer_version</span>);
        }<span>else</span>{
            <span>throw</span><span>new</span> ErrorException(<span>'version Validate Error'</span>);
        }
    }

    <span>/**
     * 将数字转为版本
     *<span> @param</span>  Int     $version_code 版本的数字表示
     *<span> @return</span> String
     */</span><span>public</span><span><span>function</span><span>integer_to_version</span><span>(<span>$version_code</span>)</span>{</span><span>if</span>(is_numeric(<span>$version_code</span>) && <span>$version_code</span>>=<span>10000</span>){
            <span>$version</span> = <span>array</span>();
            <span>$version</span>[<span>0</span>] = (int)(<span>$version_code</span>/<span>10000</span>);
            <span>$version</span>[<span>1</span>] = (int)(<span>$version_code</span>%<span>10000</span>/<span>100</span>);
            <span>$version</span>[<span>2</span>] = <span>$version_code</span>%<span>100</span>;
            <span>return</span> implode(<span>'.'</span>, <span>$version</span>);
        }<span>else</span>{
            <span>throw</span><span>new</span> ErrorException(<span>'version code Validate Error'</span>);
        }
    }

    <span>/**
     * 检查版本格式是否正确
     *<span> @param</span>  String  $version 版本
     *<span> @return</span> Boolean
     */</span><span>public</span><span><span>function</span><span>check</span><span>(<span>$version</span>)</span>{</span><span>$ret</span> = preg_match(<span>'/^[0-9]{1,3}\.[0-9]{1,2}\.[0-9]{1,2}$/'</span>, <span>$version</span>);
        <span>return</span><span>$ret</span>? <span>true</span> : <span>false</span>;
    }

    <span>/**
     * 比较两个版本的值
     *<span> @param</span>  String  $version1  版本1
     *<span> @param</span>  String  $version2  版本2
     *<span> @return</span> Int                -1:1<2, 0:相等, 1:1>2
     */</span><span>public</span><span><span>function</span><span>compare</span><span>(<span>$version1</span>, <span>$version2</span>)</span>{</span><span>if</span>(<span>$this</span>->check(<span>$version1</span>) && <span>$this</span>->check(<span>$version2</span>)){
            <span>$version1_code</span> = <span>$this</span>->version_to_integer(<span>$version1</span>);
            <span>$version2_code</span> = <span>$this</span>->version_to_integer(<span>$version2</span>);

            <span>if</span>(<span>$version1_code</span>><span>$version2_code</span>){
                <span>return</span><span>1</span>;
            }<span>elseif</span>(<span>$version1_code</span><<span>$version2_code</span>){
                <span>return</span> -<span>1</span>;
            }<span>else</span>{
                <span>return</span><span>0</span>;
            }
        }<span>else</span>{
            <span>throw</span><span>new</span> ErrorException(<span>'version1 or version2 Validate Error'</span>);
        }
    }

} <span>// class end</span><span>?></span></span></code>

<code><span><?php</span><span>require</span><span>'Version.class.php'</span>;

<span>$version</span> = <span>'2.7.1'</span>;

<span>$obj</span> = <span>new</span> Version();

<span>// 版本转数字</span><span>$version_code</span> = <span>$obj</span>->version_to_integer(<span>$version</span>);
<span>echo</span><span>$version_code</span>.<span>'<br>'</span>;  <span>// 20701</span><span>// 数字转版本</span><span>$version</span> = <span>$obj</span>->integer_to_version(<span>$version_code</span>);
<span>echo</span><span>$version</span>.<span>'<br>'</span>; <span>// 2.7.1</span><span>// 检查版本</span><span>$version</span> = <span>'1.1.a'</span>;
var_dump(<span>$obj</span>->check(<span>$version</span>)); <span>// false</span><span>// 比较两个版本</span><span>$version1</span> = <span>'2.9.9'</span>;
<span>$version2</span> = <span>'10.0.1'</span>;

<span>$result</span> = <span>$obj</span>->compare(<span>$version1</span>, <span>$version2</span>);
<span>echo</span><span>$result</span>; <span>// -1</span><span>?></span></code>