PHP File handling
Syntax
- int readfile ( string $filename [, bool $use_include_path = false [, resource $context ]] )
Parameters
| Parameter | Description |
|---|---|
| filename | The filename being read. |
| use_include_path | You can use the optional second parameter and set it to TRUE, if you want to search for the file in the include_path, too. |
| context | A context stream resource. |
Remarks
Filename syntax
Most filenames passed to functions in this topic are:
- Strings in nature.
- File names can be passed directly. If values of other types are passed, they are cast to string. This is especially useful with
SplFileInfo, which is the value in the iteration ofDirectoryIterator.
- File names can be passed directly. If values of other types are passed, they are cast to string. This is especially useful with
- Relative or absolute.
- Accept protocols.
- They may begin with
scheme://to specify the protocol wrapper to manage with. For example,file_get_contents("http://example.com")retrieves content from http://example.com.
- They may begin with
- Slash-compatible.
- While the
DIRECTORY_SEPARATORon Windows is a backslash, and the system returns backslashes for paths by default, the developer can still use/as the directory separator. Therefore, for compatibility, developers can use/as directory separators on all systems, but be aware that the values returned by the functions (e.g.realpath) may contain backslashes.
- While the
