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# curl_setopt

(PHP 4 >= 4.0.2)

curl_setopt -- Set an option for a CURL transfer

## Description

bool curl_setopt ( resource ch, string option, mixed value)

The curl_setopt() function will set options for a CURL session identified by the `ch` parameter. The `option` parameter is the option you want to set, and the `value` is the value of the option given by the `option`.

The `value` should be a long for the following options (specified in the `option` parameter):

- `CURLOPT_INFILESIZE`: When you are uploading a file to a remote site, this option should be used to tell PHP what the expected size of the infile will be.

- `CURLOPT_VERBOSE`: Set this option to a non-zero value if you want CURL to report everything that is happening.

- `CURLOPT_HEADER`: Set this option to a non-zero value if you want the header to be included in the output.

- `CURLOPT_NOPROGRESS`: Set this option to a non-zero value if you don't want PHP to display a progress meter for CURL transfers.

  > Anmerkung: PHP automatically sets this option to a non-zero parameter, this should only be changed for debugging purposes.

- `CURLOPT_NOBODY`: Set this option to a non-zero value if you don't want the body included with the output.

- `CURLOPT_FAILONERROR`: Set this option to a non-zero value if you want PHP to fail silently if the HTTP code returned is greater than 300. The default behavior is to return the page normally, ignoring the code.

- `CURLOPT_UPLOAD`: Set this option to a non-zero value if you want PHP to prepare for an upload.

- `CURLOPT_POST`: Set this option to a non-zero value if you want PHP to do a regular HTTP POST. This POST is a normal `application/x-www-form-urlencoded` kind, most commonly used by HTML forms.

- `CURLOPT_FTPLISTONLY`: Set this option to a non-zero value and PHP will just list the names of an FTP directory.

- `CURLOPT_FTPAPPEND`: Set this option to a non-zero value and PHP will append to the remote file instead of overwriting it.

- `CURLOPT_NETRC`: Set this option to a non-zero value and PHP will scan your `~./netrc` file to find your username and password for the remote site that you're establishing a connection with.

- `CURLOPT_FOLLOWLOCATION`: Set this option to a non-zero value to follow any "Location: " header that the server sends as a part of the HTTP header (note this is recursive, PHP will follow as many "Location: " headers that it is sent.)

- `CURLOPT_PUT`: Set this option to a non-zero value to HTTP PUT a file. The file to PUT must be set with the CURLOPT_INFILE and CURLOPT_INFILESIZE.

- `CURLOPT_MUTE`: Set this option to a non-zero value and PHP will be completely silent with regards to the CURL functions.

- `CURLOPT_TIMEOUT`: Pass a long as a parameter that contains the maximum time, in seconds, that you'll allow the CURL functions to take.

- `CURLOPT_LOW_SPEED_LIMIT`: Pass a long as a parameter that contains the transfer speed in bytes per second that the transfer should be below during CURLOPT_LOW_SPEED_TIME seconds for PHP to consider it too slow and abort.

- `CURLOPT_LOW_SPEED_TIME`: Pass a long as a parameter that contains the time in seconds that the transfer should be below the CURLOPT_LOW_SPEED_LIMIT for PHP to consider it too slow and abort.

- `CURLOPT_RESUME_FROM`: Pass a long as a parameter that contains the offset, in bytes, that you want the transfer to start from.

- `CURLOPT_SSLVERSION`: Pass a long as a parameter that contains the SSL version (2 or 3) to use. By default PHP will try and determine this by itself, although, in some cases you must set this manually.

- `CURLOPT_SSL_VERIFYHOST`: Pass a long if CURL should verify the Common name of the peer certificate in the SSL handshake. A value of 1 denotes that we should check for the existence of the common name, a value of 2 denotes that we should make sure it matches the provided hostname.

- `CURLOPT_TIMECONDITION`: Pass a long as a parameter that defines how the CURLOPT_TIMEVALUE is treated. You can set this parameter to TIMECOND_IFMODSINCE or TIMECOND_ISUNMODSINCE. This is a HTTP-only feature.

- `CURLOPT_TIMEVALUE`: Pass a long as a parameter that is the time in seconds since January 1st, 1970. The time will be used as specified by the CURLOPT_TIMEVALUE option, or by default the TIMECOND_IFMODSINCE will be used.

- `CURLOPT_RETURNTRANSFER`: Pass a non-zero value if you want CURL to directly return the transfer instead of printing it out directly.

The `value` parameter should be a string for the following values of the `option` parameter:

- `CURLOPT_URL`: This is the URL that you want PHP to fetch. You can also set this option when initializing a session with the curl_init() function.

- `CURLOPT_USERPWD`: Pass a string formatted in the [username]:[password] manner, for PHP to use for the connection.

- `CURLOPT_PROXYUSERPWD`: Pass a string formatted in the [username]:[password] format for connection to the HTTP proxy.

- `CURLOPT_RANGE`: Pass the specified range you want. It should be in the "X-Y" format, where X or Y may be left out. The HTTP transfers also support several intervals, separated with commas as in X-Y,N-M.

- `CURLOPT_POSTFIELDS`: Pass a string containing the full data to post in an HTTP "POST" operation.

- `CURLOPT_REFERER`: Pass a string containing the "referer" header to be used in an HTTP request.

- `CURLOPT_USERAGENT`: Pass a string containing the "user-agent" header to be used in an HTTP request.

- `CURLOPT_FTPPORT`: Pass a string containing the value which will be used to get the IP address to use for the ftp "POST" instruction. The POST instruction tells the remote server to connect to our specified IP address. The string may be a plain IP address, a hostname, a network interface name (under UNIX), or just a plain '-' to use the systems default IP address.

- `CURLOPT_COOKIE`: Pass a string containing the content of the cookie to be set in the HTTP header.

- `CURLOPT_SSLCERT`: Pass a string containing the filename of PEM formatted certificate.

- `CURLOPT_SSLCERTPASSWD`: Pass a string containing the password required to use the CURLOPT_SSLCERT certificate.

- `CURLOPT_COOKIEFILE`: Pass a string containing the name of the file containing the cookie data. The cookie file can be in Netscape format, or just plain HTTP-style headers dumped into a file.

- `CURLOPT_CUSTOMREQUEST`: Pass a string to be used instead of `GET` or `HEAD` when doing an HTTP request. This is useful for doing `DELETE` or other, more obscure, HTTP requests. Valid values are things like `GET`, `POST`, and so on; i.e. do not enter a whole HTTP request line here. For instance, entering 'GET /index.html HTTP/1.0\r\n\r\n' would be incorrect.

  > Anmerkung: Don't do this without making sure your server supports the command first.

- `CURLOPT_PROXY`: Give the name of the HTTP proxy to tunnel requests through.

- `CURLOPT_INTERFACE`: Pass the name of the outgoing network interface to use. This can be an interface name, an IP address or a host name.

- `CURLOPT_KRB4LEVEL`: Pass the KRB4 (Kerberos 4) security level. Anyone of the following strings (in order from least powerful, to most powerful): 'clear', 'safe', 'confidential', 'private'. If the string does not match one of these, then 'private' is used. If you set this to NULL, this disables KRB4 security. KRB4 security only works with FTP transactions currently.

- `CURLOPT_HTTPHEADER`: Pass an array of HTTP header fields to set.

- `CURLOPT_QUOTE`: Pass an array of FTP commands to perform on the server prior to the FTP request.

- `CURLOPT_POSTQUOTE`: Pass an array of FTP commands to execute on the server, after the FTP request has been performed.

The following options expect a file descriptor that is obtained by using the fopen() function:

- `CURLOPT_FILE`: The file where the output of your transfer should be placed, the default is STDOUT.

- `CURLOPT_INFILE`: The file where the input of your transfer comes from.

- `CURLOPT_WRITEHEADER`: The file to write the header part of the output into.

- `CURLOPT_STDERR`: The file to write errors to instead of stderr.

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