PHP is_writable() Function

In this chapter you will learn:

1. Definition for PHP is_writable() Function
2. Syntax for PHP is_writable() Function
3. Parameter for PHP is_writable() Function
4. Return for PHP is_writable() Function
5. Note on PHP is_writable() Function
6. Example - checks whether the specified file is writeable

Definition

The is_writable() function checks whether the specified file is writeable.

Syntax

PHP is_writable() Function has the following syntax.

Parameter

Return

This function returns TRUE if the file is writeable.

Note

The result of this function are cached. Use clearstatcache() to clear the cache.

Example

is_writeable() returns true if the string parameter is writeable.

For example, to check whether a file is writeable:

<?PHP/*from j  a  va 2s .  c  o m*/
      $filename = 'c:\boot.ini'; // Windows
     // $filename = '/etc/passwd'; // Unix

      if (is_writeable($filename)) {
             print 'File writeable!';
      } else {
             print 'File not writeable!';
      }
?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Definition for PHP link() Function
2. Syntax for PHP link() Function
3. Parameter for PHP link() Function
4. Return for
5. Note on PHP link() Function
6. Example - creates a hard link from the existing target with the specified name link

PHP basename() function

PHP chdir() function

PHP chgrp() Function

PHP chmod() Function

PHP chown() Function

PHP chroot() Function

PHP clearstatcache() Function

PHP closedir() Function

PHP copy() Function

PHP delete() function

PHP dir() Function

PHP dirname() Function

PHP disk_free_space() Function

PHP disk_total_space() Function

PHP diskfreespace() Function

PHP fclose() Function

PHP feof() Function

PHP fflush() Function

PHP fgetc() Function

PHP fgets() Function

PHP fgetss() Function

PHP file() Function

PHP file_exists() Function

PHP file_get_contents() Function

PHP file_put_contents() Function

PHP fileatime() Function

PHP filectime() Function

PHP filegroup() Function

PHP fileinode() Function

PHP filemtime() Function

PHP fileowner() Function

PHP fileperms() Function

PHP filesize() Function

PHP filetype() Function

PHP flock() Function

PHP fnmatch() Function

PHP fopen() Function

PHP fpassthru() Function

PHP fprintf() Function

PHP fputcsv() Function

PHP fputs() Function

PHP fread() Function

PHP fscanf() Function

PHP fseek() Function

PHP fstat() Function

PHP ftell() Function

PHP ftruncate() Function

PHP fwrite() Function

PHP getcwd() function

PHP glob() Function

PHP is_dir() Function

PHP is_executable() Function

PHP is_file() Function

PHP is_link() Function

PHP is_readable() Function

PHP is_uploaded_file() Function

PHP is_writable() Function

PHP link() Function

PHP linkinfo() Function

PHP lstat() Function

PHP md5_file() Function

PHP mkdir() Function

PHP move_uploaded_file() Function

PHP opendir() Function

PHP parse_ini_file() Function

PHP pathinfo() Function

PHP pclose() Function

PHP popen() Function

PHP readdir() Function

PHP readfile() Function

PHP readlink() Function

PHP realpath() Function

PHP rename() Function

PHP rewind() Function

PHP rewinddir() Function

PHP rmdir() Function

PHP scandir() Function

PHP set_file_buffer() Function

PHP sha1_file() Function

PHP stat() Function

PHP symlink() Function

PHP tempnam() Function

PHP tmpfile() Function

PHP touch() Function

PHP umask() Function

PHP unlink() Function

PHP vfprintf() Function