- Every stream has a scheme and a target:
|Stream Resource||The data provider consisting of the |
Streams are essentially a transfer of data between an origin and a destination, to paraphrase Josh Lockhart in his book Modern PHP.
The origin and the destination can be
- a file
- a command-line process
- a network connection
- a ZIP or TAR archive
- temporary memory
- standard input/output
or any other resource available via PHP's stream wrappers.
Examples of available stream wrappers (
- file:// — Accessing local filesystem
- http:// — Accessing HTTP(s) URLs
- ftp:// — Accessing FTP(s) URLs
- php:// — Accessing various I/O streams
- phar:// — PHP Archive
- ssh2:// — Secure Shell 2
- ogg:// — Audio streams
The scheme (origin) is the identifier of the stream's wrapper. For example, for the file system this is
file://. The target is the stream's data source, for example the file name.
Registering a stream wrapper
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