php zip文件內(nèi)容比較類，

一個php實(shí)現(xiàn)的zip文件內(nèi)容比較類及其用法,可實(shí)現(xiàn)比較兩個zip文件的內(nèi)容,返回新增、刪除、及相同的文件列表。

php實(shí)現(xiàn)的zip文件內(nèi)容比較類。是一個非常實(shí)用的PHP類文件。
該php zip文件比較類主要實(shí)現(xiàn)比較兩個zip文件的內(nèi)容，返回新增，刪除，及相同的文件列表。暫時只支持單層。
需求：上傳一個zip文件，zip內(nèi)有很多圖片文件。需要對圖片文件進(jìn)行一系列很耗時的處理。當(dāng)用戶再更新zip文件時。判斷zip內(nèi)文件是否一致，只處理不同的文件。這樣可以節(jié)省資源與時間，因此需要編寫一個能夠比較zip內(nèi)文件的類。
ZipCompare.class.php類文件如下：

<?<span>php 
</span><span>/*</span><span>* Zip Compare class 比較兩個zip文件的內(nèi)容，返回新增，刪除，及相同的文件列表，暫時只支持單層 
* Date: 2014-05-18 
* Author: fdipzone 
* Ver: 1.0 
* www.jbxue.com
* Func: 
* public compare 比較zip文件內(nèi)容 
* private getInfo 獲取zip內(nèi)文件列表 
* private parse 分析兩個zip的文件內(nèi)容 
* private check 檢查zip文件是否正確 
* private check_handler 檢查服務(wù)器是否有安裝unzip 
</span><span>*/</span> 

<span>class</span> ZipCompare{ <span>//</span><span> class start </span>

<span>/*</span><span>* 比較zip文件內(nèi)容，列出不相同的部分 
* @param String $zipfile1 zip文件1 
* @param String $zipfile2 zip文件2 
* @return Array 
</span><span>*/</span> 
<span>public</span> <span>function</span> compare(<span>$zipfile1</span>, <span>$zipfile2</span><span>){ 

</span><span>//</span><span> 檢查是否有安裝unzip </span>
<span>if</span>(!<span>$this</span>-><span>check_handler()){ 
</span><span>throw</span> <span>new</span> <span>Exception</span>('unzip not install'<span>); 
} 

</span><span>//</span><span> 檢查zip文件 </span>
<span>if</span>(!<span>$this</span>->check(<span>$zipfile1</span>) || !<span>$this</span>->check(<span>$zipfile2</span><span>)){ 
</span><span>throw</span> <span>new</span> <span>Exception</span>('zipfile not exists or error'<span>); 
} 

</span><span>//</span><span> 獲取zip內(nèi)文件列表 </span>
<span>$zipinfo1</span> = <span>$this</span>->getInfo(<span>$zipfile1</span><span>); 
</span><span>$zipinfo2</span> = <span>$this</span>->getInfo(<span>$zipfile2</span><span>); 

</span><span>//</span><span> 分析兩個zip的文件內(nèi)容，返回相同及不同的文件列表 </span>
<span>return</span> <span>$this</span>->parse(<span>$zipinfo1</span>, <span>$zipinfo2</span><span>); 
} 

</span><span>/*</span><span>* 獲取zip內(nèi)文件列表 
* @param String $zipfile zip文件 
* @return Array zip內(nèi)文件列表 
</span><span>*/</span> 
<span>private</span> <span>function</span> getInfo(<span>$zipfile</span><span>){ 

</span><span>//</span><span> unzip -v fields </span>
<span>$fields</span> = <span>array</span>('Length','Method','Size','Cmpr','Date','Time','CRC-32','Name'<span>); 

</span><span>//</span><span> zip verbose </span>
<span>$verbose</span> = <span>shell_exec</span>(<span>sprintf</span>("unzip -v %s | sed '\$d' | sed '\$d' | sed -n '4,\$p'", <span>$zipfile</span><span>)); 

</span><span>//</span><span> zip info </span>
<span>$zipinfo</span> = <span>array</span><span>(); 

</span><span>$filelist</span> = <span>explode</span>("\n", <span>$verbose</span><span>); 

</span><span>if</span>(<span>$filelist</span><span>){ 
</span><span>foreach</span>(<span>$filelist</span> <span>as</span> <span>$rowdata</span><span>){ 
</span><span>if</span>(<span>$rowdata</span>==''<span>){ 
</span><span>continue</span><span>; 
} 
</span><span>$rowdata</span> = <span>preg_replace</span>('/[ ]{2,}/', ' ', <span>$rowdata</span>); <span>//</span><span> 將兩個或以上空格替換為一個 </span>
<span>$tmp</span> = <span>array_slice</span>(<span>explode</span>(' ', <span>$rowdata</span>), 1); <span>//</span><span> 去掉第一個空格 </span>

<span>$file</span> = <span>array_combine</span>(<span>$fields</span>, <span>$tmp</span><span>); 

</span><span>$zipinfo</span>[<span>$file</span>['Name']] = <span>$file</span>['Length'].'_'.<span>$file</span>['CRC-32']; <span>//</span><span> 文件名，長度，CRC32，用于校驗(yàn) </span>
<span>} 
} 
</span><span>return</span> <span>$zipinfo</span><span>; 
} 

</span><span>/*</span><span>* 分析兩個zip文件內(nèi)容 
* @param String $zipinfo1 
* @param String $zipinfo2 
* @return Array 
</span><span>*/</span> 
<span>private</span> <span>function</span> parse(<span>$zipinfo1</span>, <span>$zipinfo2</span><span>){ 

</span><span>$result</span> = <span>array</span><span>( 
</span>'add' => <span>array</span>(), <span>//</span><span> 新增 </span>
'del' => <span>array</span>(), <span>//</span><span> 缺少 </span>
'match' => <span>array</span>() <span>//</span><span> 匹配 </span>
<span>); 

</span><span>if</span>(<span>$zipinfo1</span> && <span>$zipinfo2</span><span>){ 

</span><span>//</span><span> 在zip1但不在zip2的文件 </span>
<span>$result</span>['add'] = <span>array_values</span>(<span>array_diff</span>(<span>array_keys</span>(<span>$zipinfo1</span>), <span>array_keys</span>(<span>$zipinfo2</span><span>))); 

</span><span>//</span><span> 在zip2但不在zip1的文件 </span>
<span>$result</span>['del'] = <span>array_values</span>(<span>array_diff</span>(<span>array_keys</span>(<span>$zipinfo2</span>), <span>array_keys</span>(<span>$zipinfo1</span><span>))); 

</span><span>//</span><span> 同時在zip1與zip2的文件 </span>
<span>$match_file</span> = <span>array_values</span>(<span>array_diff</span>(<span>array_keys</span>(<span>$zipinfo1</span>), <span>$result</span>['add'<span>])); 

</span><span>//</span><span> 檢查相同文件名的文件內(nèi)容是否匹配 </span>
<span>for</span>(<span>$i</span>=0,<span>$len</span>=<span>count</span>(<span>$match_file</span>); <span>$i</span><<span>$len</span>; <span>$i</span>++<span>){ 

</span><span>if</span>(<span>$zipinfo1</span>[<span>$match_file</span>[<span>$i</span>]]==<span>$zipinfo2</span>[<span>$match_file</span>[<span>$i</span>]]){ <span>//</span><span> match </span>
<span>array_push</span>(<span>$result</span>['match'], <span>$match_file</span>[<span>$i</span><span>]); 
}</span><span>else</span>{ <span>//</span><span> not match, change to add </span>
<span>array_push</span>(<span>$result</span>['add'], <span>$match_file</span>[<span>$i</span><span>]); 
} 
} 
} 
</span><span>return</span> <span>$result</span><span>; 
} 

</span><span>/*</span><span>* 檢查zip文件是否正確 
* @param String $zipfile zip文件 
* @return boolean 
</span><span>*/</span> 
<span>private</span> <span>function</span> check(<span>$zipfile</span><span>){ 
</span><span>//</span><span> 文件存在且能解壓 </span>
<span>return</span> <span>file_exists</span>(<span>$zipfile</span>) && <span>shell_exec</span>(<span>sprintf</span>('unzip -v %s | wc -l', <span>$zipfile</span>))>1<span>; 
} 

</span><span>/*</span><span>* 檢查服務(wù)器是否有安裝unzip 
* @return boolean 
</span><span>*/</span> 
<span>private</span> <span>function</span><span> check_handler(){ 
</span><span>return</span> <span>strstr</span>(<span>shell_exec</span>('unzip -v'), 'version')!=''<span>; 
} 
} </span><span>//</span><span> class end </span>
?>

demo示例程序如下：

<?<span>php 
</span><span>require</span> "ZipCompare.class.php"<span>;

</span><span>$obj</span> = <span>new</span><span> ZipCompare(); 
</span><span>$result</span> = <span>$obj</span>->compare('test1.zip','test2.zip'<span>);

</span><span>print_r</span>(<span>$result</span><span>);

</span>?>

執(zhí)行后輸出：

Array
(
[add] => Array
(
[0] => 9.jpg
)

[del] => Array
(
[0] => 5.jpg
[1] => 6.jpg
[2] => 7.jpg
[3] => 8.jpg
)

[match] => Array
(
[0] => 1.jpg
[1] => 10.jpg
[2] => 11.jpg
[3] => 12.jpg
[4] => 13.jpg
[5] => 14.jpg
[6] => 15.jpg
[7] => 16.jpg
[8] => 17.jpg
[9] => 18.jpg
[10] => 2.jpg
[11] => 3.jpg
[12] => 4.jpg
)
)