This module enables you to transparently read and write gzip (.gz) compressed files, through versions of most of the filesystem functions which work with gzip-compressed files (and uncompressed files, too, but not with sockets).
Óçìåßùóç: Version 4.0.4 introduced a fopen-wrapper for .gz-files, so that you can use a special zlib: URL to access compressed files transparently using the normal f*() file access functions if you prefix the filename or path with zlib: when calling fopen(). This feature requires a C runtime library that provides the fopencookie() function. Up to now the GNU libc seems to be the only library that provides this feature.
In PHP 4.3.0, zlib: has been changed to compress.zlib:// to prevent ambiguities with filenames containing ':' characters. The fopencookie() function is not longer required. More information is available in the section about ôï ôìÞìá ìå üíïìá Compression Streams óå ÐáñÜñôçìá M.
This module uses the functions of zlib by Jean-loup Gailly and Mark Adler. You have to use a zlib version >= 1.0.9 with this module.
Zlib support in PHP is not enabled by default. You will need to configure PHP --with-zlib[=DIR]
Η έκδοση για windows της PHP έχει ενσωματωμένη υποστήριξη για αυτή την επέκταση. Δεν χρειάζεται να φορτώσετε κάποια πρόσθετη επέκταση για να χρησιμοποιήσετε αυτές τις συναρτήσεις.
Óçìåßùóç: Builtin support for zlib on Windows is available with PHP 4.3.0.
Η συμπεριφορά αυτών των συναρτήσεων επιρεάζεται από τις ρυθμίσεις στο php.ini.
The zlib extension offers the option to transparently compress your pages on-the-fly, if the requesting browser supports this. Therefore there are three options in the configuration file php.ini.
Ðßíáêáò 1. Zlib Configuration Options
Name | Default | Changeable | Changelog |
---|---|---|---|
zlib.output_compression | "0" | PHP_INI_ALL | Available since PHP 4.0.5. |
zlib.output_compression_level | "-1" | PHP_INI_ALL | Available since PHP 4.3.0. |
zlib.output_handler | "" | PHP_INI_ALL | Available since PHP 4.3.0. |
Ακολουθεί μια μικρή επεξήγηση των directive ρυθμίσεων.
Whether to transparently compress pages. If this option is set to "On" in php.ini or the Apache configuration, pages are compressed if the browser sends an "Accept-Encoding: gzip" or "deflate" header. "Content-Encoding: gzip" (respectively "deflate") and "Vary: Accept-Encoding" headers are added to the output. In runtime, it can be set only before sending any output.
This option also accepts integer values instead of boolean "On"/"Off", using this you can set the output buffer size (default is 4KB).
Óçìåßùóç: output_handler must be empty if this is set 'On' ! Instead you must use zlib.output_handler.
Compression level used for transparent output compression.
You cannot specify additional output handlers if zlib.output_compression is activated here. This setting does the same as output_handler but in a different order.
Αυτή η επέκταση δεν έχει resource τύπους ορισμένους.
Οι σταθερές παρακάτω ορίζονται από αυτή την επέκταση, και θα είναι διαθέσιμες μόνο αν η επέκταση έχει γίνει compile μέσα στην PHP ή έχει φορτωθεί δυναμικά κατά την εκτέλεση.
This example opens a temporary file and writes a test string to it, then it prints out the content of this file twice.