01-29-2013
Quote:
Originally Posted by
Praveen_218
The primary reason to ask this query is because of the fact that the MAN pages themselves not making me sure if the programmer needs to handle any kind of cleanup post calling strerror()? Just like the call to stat(), lstat(), fstat() which create objects of type struct stat on the heap itself (whose address is returned through the pointer struct stat *sb)
They do no such thing. Pointers do not work that way! You cannot "return an address" through a pointer you pass
into a function, any more than you can return a number through a number you pass
into a function.
You do not need to clean up after strerror -- or stat, lstat, or fstat, either.
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LSTAT(3) 1 LSTAT(3)
lstat - Gives information about a file or symbolic link
SYNOPSIS
array lstat (string $filename)
DESCRIPTION
Gathers the statistics of the file or symbolic link named by $filename.
PARAMETERS
o $filename
- Path to a file or a symbolic link.
RETURN VALUES
See the manual page for stat(3) for information on the structure of the array that lstat(3) returns. This function is identical to the
stat(3) function except that if the $filename parameter is a symbolic link, the status of the symbolic link is returned, not the status of
the file pointed to by the symbolic link.
EXAMPLES
Example #1
Comparison of stat(3) and lstat(3)
<?php
symlink('uploads.php', 'uploads');
// Contrast information for uploads.php and uploads
array_diff(stat('uploads'), lstat('uploads'));
?>
The above example will output something similar to:
Information that differs between the two files.
Array
(
[ino] => 97236376
[mode] => 33188
[size] => 34
[atime] => 1223580003
[mtime] => 1223581848
[ctime] => 1223581848
[blocks] => 8
)
ERRORS
/EXCEPTIONS
Upon failure, an E_WARNING is emitted.
NOTES
Note
The results of this function are cached. See clearstatcache(3) for more details.
Tip
As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to "Supported Protocols and Wrappers" to determine
which wrappers support stat(3) family of functionality.
SEE ALSO
stat(3).
PHP Documentation Group LSTAT(3)