is_writable
Determine whether the given file name is writable
English
English
is_writable() function determines whether the specified file is writable.
<?php
$file = "test.txt";
if(is_writable($file))
{
echo ("$file is writeable");
}
else
{
echo ("$file is not writeable");
}
?>
输出：
test.txt is writeable
is_writable ( file )
| parameter | describe |
|---|---|
| file | Required. Specify documents to be inspected. |
Return true if the file exists and is writable. The file parameter can be a directory name that allows for writable checks.
