PHP implementation Zip Compressed file extract code sharing (easy to understand) _php instance

Careful research, the original use of PHP to write the decompression program efficiency than the imagination is still high many, since so good, and then optimize the use of their own backstage, although now most of the space Control Panel has compression and decompression this function, but sometimes some trouble.

Do this before, no contact with the PHP compression this piece, online search some, most are PHP compression class, compression function, less than hundreds of lines, more than thousands of lines of code. This is very confusing to my novice, and I don't need to be so complicated. The last reference to the function manual, the understanding of a number of related functions, you will understand how to complete the.

Remember to open the zip and remove the semicolon in front of the Extension=php_zip.dll in the php.ini.

Source code Example:

Copy Code code as follows:

<?php

Need to open configuration Php_zip.dll
Phpinfo ();
Header ("Content-type:text/html;charset=utf-8");

function Get_zip_originalsize ($filename, $path) {
First determine if the file you want to extract exists
if (!file_exists ($filename)) {
Die ("file $filename does not exist!") ");
}
$starttime = Explode (', microtime ()); Time to start decompression

The file name and path are converted to the Windows system default gb2312 encoding, otherwise you will not be able to read the
$filename = Iconv ("Utf-8", "gb2312", $filename);
$path = Iconv ("Utf-8", "gb2312", $path);
Open a compressed package
$resource = Zip_open ($filename);
$i = 1;
Traversal read a file inside a compressed package
while ($dir _resource = Zip_read ($resource)) {
If you can open it, continue.
if (Zip_entry_open ($resource, $dir _resource)) {
Gets the name of the current project, which is the current file name in the ZIP package
$file _name = $path. Zip_entry_name ($dir _resource);
Split the Last "/", then intercept the path part with a string
$file _path = substr ($file _name,0,strrpos ($file _name, "/"));
If the path does not exist, a directory is created, and True indicates that you can create multilevel catalogs
if (!is_dir ($file _path)) {
mkdir ($file _path,0777,true);
}
Write file if it is not a directory
if (!is_dir ($file _name)) {
Read this file
$file _size = zip_entry_filesize ($dir _resource);
Maximum read 6M, if the file is too large, skip decompression, continue to the next
if ($file _size< (1024*1024*6)) {
$file _content = Zip_entry_read ($dir _resource, $file _size);
File_put_contents ($file _name, $file _content);
}else{
echo "<p>". $i + +. "This file has been skipped because the file is too large,->". Iconv ("gb2312", "Utf-8", $file _name). "</p>";
}
}
Closes the current
Zip_entry_close ($dir _resource);
}
}
Turn off compression packs
Zip_close ($resource);
$endtime = Explode (', microtime ()); Time the decompression ended
$thistime = $endtime [0]+ $endtime [1]-($starttime [0]+ $starttime [1]);
$thistime = Round ($thistime, 3); Keep 3 as Decimal
echo "<p> decompression completed! , this decompression cost: $thistime seconds. </p> ";
}

$size = get_zip_originalsize (' 20131101.zip ', ' temp/');

?>

The test unzipped a small file of more than 300 KB and took 0.115 seconds to test the decompression of a more than 30 MB (web file, small file more) and took more than 20 seconds.