仔细的研究了一下,原来用php写的解压程序效率比想象的还是高很多的,既然这么好,干脆再优化一下后用到自己后台中,虽然现在大部分空间的控制面板中有压缩和解压这个功能,但是毕竟有时候有些麻烦。
做这个之前,没有接触过php压缩这一块,网上搜了一些,大多数都是php压缩类、压缩函数,少则几百行,多的就几千行代码。这对于我这种新手来说很摸不到头脑,再说我也不用这么复杂的功能。最后参考函数手册,理清楚了几个相关的函数后,就明白了怎么去整了。
记得要开启 zip ,把 php.ini 中的 extension=php_zip.dll 前面的分号去掉。
源码范例:
复制代码 代码如下:
//需开启配置 php_zip.dll
//phpinfo();
header("Content-type:text/html;charset=utf-8");
function get_zip_originalsize($filename, $path) {
//先判断待解压的文件是否存在
if(!file_exists($filename)){
die("文件 $filename 不存在!");
}
$starttime = explode(' ',microtime()); //解压开始的时间
//将文件名和路径转成windows系统默认的gb2312编码,否则将会读取不到
$filename = iconv("utf-8","gb2312",$filename);
$path = iconv("utf-8","gb2312",$path);
//打开压缩包
$resource = zip_open($filename);
$i = 1;
//遍历读取压缩包里面的一个个文件
while ($dir_resource = zip_read($resource)) {
//如果能打开则继续
if (zip_entry_open($resource,$dir_resource)) {
//获取当前项目的名称,即压缩包里面当前对应的文件名
$file_name = $path.zip_entry_name($dir_resource);
//以最后一个“/”分割,再用字符串截取出路径部分
$file_path = substr($file_name,0,strrpos($file_name, "/"));
//如果路径不存在,则创建一个目录,true表示可以创建多级目录
if(!is_dir($file_path)){
mkdir($file_path,0777,true);
}
//如果不是目录,则写入文件
if(!is_dir($file_name)){
//读取这个文件
$file_size = zip_entry_filesize($dir_resource);
//最大读取6M,如果文件过大,跳过解压,继续下一个
if($file_size $file_content = zip_entry_read($dir_resource,$file_size);
file_put_contents($file_name,$file_content);
}else{
echo "
".$i++." 此文件已被跳过,原因:文件过大, -> ".iconv("gb2312","utf-8",$file_name)."
";}
}
//关闭当前
zip_entry_close($dir_resource);
}
}
//关闭压缩包
zip_close($resource);
$endtime = explode(' ',microtime()); //解压结束的时间
$thistime = $endtime[0]+$endtime[1]-($starttime[0]+$starttime[1]);
$thistime = round($thistime,3); //保留3为小数
echo "
解压完毕!,本次解压花费:$thistime 秒。
";}
$size = get_zip_originalsize('20131101.zip','temp/');
?>
测试解压了一个300多KB的小文件,花了0.115秒,测试解压了一个30多MB的(网页文件,小文件比较多),花了20多秒。

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

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PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.


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