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If you are new to PHP or just need to refresh your skills, this is the place to start. This series of tutorials will give you the basic knowledge you will need to create a simple PHP website.
PHP is a reflective programming language originally designed for producing dynamic web pages.[1] PHP is used mainly in server-side scripting, but can be used from a command line interface or in standalone graphical applications. Textual User Interfaces can also be created using ncurses.
PHP 3, PHP 4, PHP 5. ftps:// since PHP 4.3.0
ftp://example.com/pub/file.txt
ftp://user:password@example.com/pub/file.txt
ftps://example.com/pub/file.txt
ftps://user:password@example.com/pub/file.txt
Allows read access to existing files and creation of new files via FTP. If the server does not support passive mode ftp, the connection will fail.
You can open files for either reading or writing, but not both simultaneously. If the remote file already exists on the ftp server and you attempt to open it for writing but have not specified the context option overwrite, the connection will fail. If you need to overwrite existing files over ftp, specify the overwrite option in the context and open the file for writing. Alternatively, you can use the FTP extension.
Appending: As of PHP 5.0.0 files may be appended via the ftp:// URL wrapper. In prior versions, attempting to append to a file via ftp:// will result in failure.
ftps:// was introduced in PHP 4.3.0. It is the same as ftp://, but attempts to negotiate a secure connection with the ftp server. If the server does not support SSL, then the connection falls back to regular unencrypted ftp.
Note: FTPS is supported starting from PHP 4.3.0, if you have compiled in support for OpenSSL.
Table N-4. Wrapper Summary
| Attribute | PHP 4 | PHP 5 |
|---|---|---|
| Restricted by allow_url_fopen | Yes | Yes |
| Allows Reading | Yes | Yes |
| Allows Writing | Yes (new files only) | Yes (new files/existing files with overwrite) |
| Allows Appending | No | Yes |
| Allows Simultaneous Reading and Writing | No | No |
| Supports stat() | No | As of PHP 5.0.0: filesize(), filetype(), file_exists(), is_file(), and is_dir() elements only. As of PHP 5.1.0: filemtime(). |
| Supports unlink() | No | Yes |
| Supports rename() | No | Yes |
| Supports mkdir() | No | Yes |
| Supports rmdir() | No | Yes |
Table N-5. Context options (as of PHP 5.0.0)
| Name | Usage | Default |
|---|---|---|
| overwrite | Allow overwriting of already existing files on remote server. Applies to write mode (uploading) only. | FALSE (Disabled) |
| resume_pos | File offset at which to begin transfer. Applies to read mode (downloading) only. | 0 (Beginning of File) |
| proxy (PHP 5.1.0 or greater) | Proxy FTP request via http proxy server. Applies to file read operations only. Ex: tcp://squid.example.com:8000 |
Underlying socket stream context options: Additional context options may be supported by the underlying transport For ftp:// streams, refer to context options for the tcp:// transport. For ftps:// streams, refer to context options for the ssl:// transport.
Another Useful functions:
wrappers.ftp | ref.ftp | function.ssh2-sftp | function.ssh2-sftp-unlink | function.ssh2-sftp-symlink | function.ssh2-sftp-stat | function.ssh2-sftp-rmdir | function.ssh2-sftp-rename | function.ssh2-sftp-realpath | function.ssh2-sftp-readlink | function.ssh2-sftp-mkdir | function.ssh2-sftp-lstat | function.ftp-systype | function.ftp-ssl-connect | function.ftp-size | function.ftp-site | function.ftp-set-option | function.ftp-rmdir | function.ftp-rename | function.ftp-rawlist | function.ftp-raw | function.ftp-quit | function.ftp-pwd | function.ftp-put | function.ftp-pasv | function.ftp-nlist | function.ftp-nb-put | function.ftp-nb-get | function.ftp-nb-fput | function.ftp-nb-fget | function.ftp-nb-continue | function.ftp-mkdir | function.ftp-mdtm | function.ftp-login | function.ftp-get | function.ftp-get-option | function.ftp-fput | function.ftp-fget | function.ftp-exec | function.ftp-delete | function.ftp-connect | function.ftp-close | function.ftp-chmod | function.ftp-chdir | function.ftp-cdup | function.ftp-alloc |
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. If you are new to PHP and want to get some idea of how it works, try the introductory tutorial. After that, check out the online manual, and the example archive sites and some of the other resources available in the links section.