Quick reference to the Internet functions of PHP.
| Function | Returns | Does what |
|---|---|---|
| header(string [, replace [, http_response_code]]) | Integer | Sends the header |
| headers_sent([file [, line]]) | Boolean | Checks if headers have been sent |
| http_build_query(query_array [, num_prefix [, arg_separator [, enc_type]]]) | String | Returns URL-encoded query string from "query_array". Default enc_type: RC1738 |
| setcookie(name [, value [expire [, path [, domain [, secure [, httponly]]]]]) | Integer | Set cookie with "name" and optionally "value" etc. |
| get_browser([user_agent [, return_array]]) | Mixed | Returns browser information |
| get_html_translation_table([table [, flags [, encoding]]]) | Array | Returns the translation table used by htmlspecialchars() and htmlentities() |
| get_meta_tags(filename [, use_inc_path]) | Array | Returns meta tags from "filename" |
| get_headers(url [, format]) | Array | Returns headers for "url" (HTTP request) |
| nl2br(string [, is_xhtml]) | String | Inserts "<br>" before linebreaks in "string" |
| parse_url(string [, component]) | Mixed | Parses URL into components |
| Function | Returns | Does what |
|---|---|---|
| connection_aborted() | Integer | Shows if connection was aborted |
| connection_status() | Integer | Returns status of connection |
| connection_timeout() | Integer | Shows if script timed out |
| ignore_user_abort([value]) | Integer | Sets if disconnecting client will terminate script |
| Function | Returns | Does what |
|---|---|---|
| session_cache_limiter(string) | String | Sets or returns the cache limiter |
| session_decode(string) | Boolean | Decodes data specified by "string" |
| session_destroy() | Boolean | Destroys session data |
| session_encode() | String | Encodes current session data into string |
| session_get_cookie_params() | Array | Returns cookie data for session |
| session_id(string) | String | Sets or returns session ID |
| session_is_registered(string) | Boolean | Shows if the var "string" is in current session |
| session_module_name(string) | String | Sets or returns session module name |
| session_name(string) | String | Sets or returns session name |
| session_register(name [, ...]) | Boolean | Registers variable(s) of session |
| session_save_path(string) | String | Sets or returns session save path |
| session_set_cookie_params(lifetime [, path [, domain [, secure [, httponly]]]]) | Nothing | Sets session cookie parameters |
| session_set_save_handler(open, close, read, write, destroy, gc) | Nothing | Sets user-level session save function |
| session_start() | Boolean | Starts a session |
| session_unregister(string) | Boolean | Un-registers "string" from session |
| session_unset() | Nothing | Frees all session vaiables |
| Function | Returns | Does what |
|---|---|---|
| curl_close(handle) | Nothing | Closes CURL-session |
| curl_exec(handle) | Boolean | Executes CURL-session |
| curl_init([url]) | Integer | Set up new CURL-session, return its handle. |
| curl_setopt(handle, option, value) | Booblean | Set "option" to "value" for "handle". |
| Function | Returns | Does what |
|---|---|---|
| apache_lookup_uri(filename) | Object | Returns information about "filename" (an URI) |
| apache_note(note_name [, note_value]) | String | Get value from notes table. Set value, if "note_value" |
| getallheaders() | Array | Returns HTTP headers |
| virtual(filename) | Integer | Eg. include the CGI "filename" |
| Function | Returns | Does what |
|---|---|---|
| mail(to, subject, message [, extra_headers [, extra_parameters]]) | Boolean | Sends an email |
| Function | Returns | Does what |
|---|---|---|
| base64_decode(string [, strict]) | String | Decodes a B64-encoded string |
| base64_encode(string) | String | Encodes a string (Base 64) |
| htmlentities(string, [, flags [, charset [, double_encode]]]) | String | Converts characters to HTML-entities |
| html_entity_decode(string, [, flags [, encoding]]) | String | Converts HTML-entities to characters |
| htmlspecialchars(string, [, flags [, charset [, double_encode]]]) | String | Converts all special characters to HTML-entities |
| htmlspecialchars_decode(string, [, flags]) | String | Converts special HTML-entities to characters |
| rawurldecode(string) | String | Decodes a rawurl-encoded string |
| rawurlencode(string) | String | Encodes everything except "-", "_", "." (RFC1738) |
| urldecode(string) | String | Decodes an url-encoded string |
| urlencode(string) | String | Url-encodes a string |
| quoted_printable_encode(string) | String | Convert a 8 bit string to a quoted-printable string |
| quoted_printable_decode(string) | String | Convert a quoted-printable string to a 8 bit string |
| convert_uuencode(string) | String | Encodes Uuencoded string |
| convert_uudecode(string) | String | Decodes Uuencoded string |
| str_rot13(string) | String | Encodes/decodes "string" with ROT 13 |
| crypt(string [, salt]) | String | DES-encrypts "string" using (2-character) "salt" |
| Function | Returns | Does what |
|---|---|---|
| addcslashes(string, charlist) | String | Adds slashes before characters in "charlist" |
| stripcslashes(string) | String | Removes slashes inserted with addcslashes() |
| addslashes(string) | String | Adds slashes to DB-sensitive characters |
| stripslashes(string) | String | Removes slashes from "string" |
| quotemeta(string) | String | Escapes meta-characters in "string" |
| strip_tags(string [, allowed_tags]) | String | Removes HTML and PHP tags from "string" |
See also: PHP Network functions.
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