(PHP 4, PHP 5, PHP 7)
Tells whether the filename is writable
bool is_writable ( string $filename )
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:
filename
The filename being checked.
Returns:
Returns TRUE if the filename exists and is writable.
Exception:
Upon failure, an E_WARNING is emitted.
Notes:
The results of this function are cached. See clearstatcache() for more details.
Examples:
is_writable() example
<?php
$filename = 'test.txt';
if (is_writable($filename)) {
echo 'The file is writable';
} else {
echo 'The file is not writable';
}
?>
See also:
fwrite() -
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