Ec (2); if you have downloaded widgets for your UNIX system, you must have encountered TAR compressed files. In UNIX systems, the tape archive file format is often used to package multiple files for kvm distribution. This format is popular not only because it exists in all UNIX systems, but also because in practical applications, it stores the directory structure, license information, user and group information of archive files, and other office buildings. PHP has a large number of built-in functions and connectable extension libraries, which can be used in almost all file formats: script ec (2); script
If you have downloaded widgets for your UNIX system, you must have encountered TAR compressed files. In UNIX systems, the tape archive file format is often used to package multiple files for kvm distribution.
This format is popular not only because it exists in all UNIX systems, but also because in practical applications, it stores the directory structure, license information, user and group information of archive files, and other office buildings.
PHP has a large number of built-in functions and connectable extension libraries, which can be used in almost all file formats. In particular, you can use the Archive_Tar class of PEAR to read and create TAR documents for notebook repairs. In this article, we will explain the behavior of this class and demonstrate how developers can use it to dynamically create, edit, and display TAR documents.
Here I will assume that you have a working database and installed PHP, And you have correctly installed PEAR's Archive_Tar class.
Note: You can directly install the PEAR Archive_Tar package from the Internet or download and install it from the Internet.
Create a TAR document
Let's start with a simple example: dynamically create TAR documents containing several files. Use the following script:
List
Include (''archive/Tar. php''); // import class
$ Obj = new archive_tar('dummy.tar '); // name of archive
$ Files = array (''mystuff/ad.gif '',
''Mystuff/alcon.doc '',
''Mystuff/alcon.xls ''); // files to store in archive
If ($ obj-> create ($ files )){
Echo ''created successfully! '';
} Else {
Echo ''error in file creation '';
}
>
This script is quite simple, but it is worth looking:
First, create an instance of the Archive_Tar class and initialize the path and file name of the created document. In this example, the file name is dummy.tar, Which is saved in the current directory of Beijing Induction Cooker.
Next, list all the archived files, including their disk addresses, and store them in a PHP array. The script (more accurately, the user who runs the script) must have the permission to access these disk addresses. Otherwise, the document creation process will fail.
Finally, the creat () method compresses all files to a single TAR file. This method accepts the input array of file names and returns a Boolean value indicating whether the document is successfully created. Remember that the script must have the permission to write files to the named disk address. Otherwise, the creat () method cannot be used, and the document creation will fail to be performed by huatai Santa Fe.
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View TAR document content
How can I view the internal information of an existing TAR file? The Archive_Tar class has a listContent () method that allows you to view the details of each component in a TAR package. List B shows how to use it:
List B
Include (''archive/Tar. php''); // import class
$ Obj = new archive_tar('dummy.tar '); // name of archive
$ Files = $ obj-> listContent (); // array of file information
Foreach ($ files as $ f ){
Foreach ($ f as $ k => $ v ){
Echo "$ k: $ vn ";
}
Echo "n ";
}
>
The output of the listContent () method is a structured array. Each array element of the Temperature Controller represents a file in the document. Typically, each element has the file name information, its license mode, owner and group user ID, status, size, and last modification time. Through a loop, you can easily extract the information, and then slightly modify the format to make it according to the expression, as mentioned in the above example. The following is an input example:
Checksum: 3872
File Name: mystuff/alcon.doc
Mode: 33206
ID: 433
ID: 106
Size: 41472
Time: 1140358031
Add a file to an existing TAR file
Because of the forgetful nature of all of us, we may sometimes forget a file. The Archive_Tar class provides
Ability to add new files to existing documents
