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XXX. Filesystem FunctionsRequirements
No external libraries are needed to build this extension, but if you want
PHP to support LFS (large files) on Linux, then you need to have a recent
glibc and you need compile PHP with the following compiler flags:
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64.
InstallationThere is no installation needed to use these
functions; they are part of the PHP core. Runtime Configuration
The behaviour of these functions is affected by settings in php.ini.
Table 1. Filesystem and Streams Configuration Options Name | Default | Changeable |
---|
allow_url_fopen | "1" | PHP_INI_ALL | user_agent | NULL | PHP_INI_ALL | default_socket_timeout | "60" | PHP_INI_ALL | from | NULL | ?? | auto_detect_line_endings | "Off" | PHP_INI_ALL |
Here's a short explanation of
the configuration directives.
- allow_url_fopen
boolean
This option enables the URL-aware fopen wrappers that enable
accessing URL object like files. Default wrappers are provided for
the access of remote files
using the ftp or http protocol, some extensions like
zlib may register additional
wrappers.
Note:
This option was introduced immediately after the release of version
4.0.3. For versions up to and including 4.0.3 you can only disable this
feature at compile time by using the configuration switch
--disable-url-fopen-wrapper.
- user_agent
string
Define the user agent for PHP to send.
- default_socket_timeout
integer
Default timeout (in seconds) for socket based streams.
Note:
This configuration option was introduced in PHP 4.3.0
- from="joe@example.com"
string
Define the anonymous ftp password (your email address).
- auto_detect_line_endings
boolean
When turned on, PHP will examine the data read by
fgets() and file() to see if it
is using Unix, MS-Dos or Macintosh line-ending conventions.
This enables PHP to interoperate with Macintosh systems,
but defaults to Off, as there is a very small performance penalty
when detecting the EOL conventions for the first line, and also
because people using carriage-returns as item separators under
Unix systems would experience non-backwards-compatible behaviour.
Note:
This configuration option was introduced in PHP 4.3.0
Predefined Constants
The constants below are defined by this extension, and
will only be available when the extension has either
been compiled into PHP or dynamically loaded at runtime.
See Also
For related functions, see also the Directory
and Program Execution sections.
For a list and explanation of the various URL wrappers that can be used
as remote files, see also Appendix J.
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