09-15-2009
Wich values you will pass to filename ?
while filename in "$(ls -1t)"
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LEARN ABOUT PHP
is_writable
IS_WRITABLE(3) 1 IS_WRITABLE(3)
is_writable - Tells whether the filename is writable
SYNOPSIS
bool is_writable (string $filename)
DESCRIPTION
Returns TRUE if the $filename exists and is writable. The filename argument may be a directory name allowing you to check if a directory
is writable.
Keep in mind that PHP may be accessing the file as the user id that the web server runs as (often 'nobody'). Safe mode limitations are not
taken into account.
PARAMETERS
o $filename
- The filename being checked.
RETURN VALUES
Returns TRUE if the $filename exists and is writable.
EXAMPLES
Example #1
is_writable(3) example
<?php
$filename = 'test.txt';
if (is_writable($filename)) {
echo 'The file is writable';
} else {
echo 'The file is not writable';
}
?>
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
is_readable(3), file_exists(3), fwrite(3).
PHP Documentation Group IS_WRITABLE(3)