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# PHP is_writable() Function * * Complete PHP Filesystem Reference](#) * * * ## Definition and Usage The is_writable() function checks whether a specified file is writable. If the file is writable, the function returns TRUE. ## Syntax is_writable(file) | Parameter | Description | | :--- | :--- | | file | Required. Specifies the file to check. | * * * ## Tips and Notes **Note:** The result of this function is cached. Use clearstatcache() to clear the cache. * * * ## Example The above code will output: test.txt is writeable * * Complete PHP Filesystem Reference](#)