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curl_setopt

(PHP 4 >= 4.0.2, PHP 5)

curl_setopt -- Set an option for a CURL transfer

Description

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

Set an option for a CURL session identified by the ch parameter. option specifies which option to set, and value specifies the value for the option given.

value should be a bool for the following values of the option parameter:

OptionSet value toNotes
CURLOPT_BINARYTRANSFER TRUE to return the raw output when CURLOPT_RETURNTRANSFER is used.  
CURLOPT_CRLF TRUE to convert Unix newlines to CRLF newlines on transfers.  
CURLOPT_DNS_USE_GLOBAL_CACHE TRUE to use a global DNS cache. This option is not thread-safe and is enabled by default.  
CURLOPT_FAILONERROR TRUE 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_FILETIME TRUE to attempt to retrieve the modification date of the remote document. You can then retrieve this value using the CURLINFO_FILETIME option with curl_getinfo().  
CURLOPT_FOLLOWLOCATION TRUE to follow any "Location: " header that the server sends as part of the HTTP header (note this is recursive, PHP will follow as many "Location: " headers that it is sent, unless CURLOPT_MAXREDIRS is set).  
CURLOPT_FORBID_REUSE TRUE to force the connection to explicitly close when it has finished processing, and not be pooled for reuse.  
CURLOPT_FRESH_CONNECT TRUE to force the use of a new connection instead of a cached one.  
CURLOPT_FTP_USE_EPRT TRUE to use EPRT (and LPRT) when doing active FTP downloads. Use FALSE to disable EPRT and LPRT and use PORT only.  
CURLOPT_FTP_USE_EPSV TRUE to first try an EPSV command for FTP transfers before reverting back to PASV. Set to FALSE to disable EPSV.  
CURLOPT_FTPAPPEND TRUE to append to the remote file instead of overwriting it.  
CURLOPT_FTPASCII An alias of CURLOPT_TRANSFERTEXT. Use that instead.  
CURLOPT_FTPLISTONLY TRUE to only list the names of an FTP directory.  
CURLOPT_HEADER TRUE to include the header in the output.  
CURLOPT_HTTPGET TRUE to reset the HTTP request method to GET. Since GET is the default, this is only necessary if the request method has been changed.  
CURLOPT_HTTPPROXYTUNNEL TRUE to tunnel through a given HTTP proxy.  
CURLOPT_MUTE TRUE to be completely silent with regards to the CURL functions.  
CURLOPT_NETRC TRUE to scan your ~/.netrc file to find your username and password for the remote site that you're establishing a connection with.  
CURLOPT_NOBODY TRUE to exclude the body from the output.  
CURLOPT_NOPROGRESS TRUE to disable the progress meter for CURL transfers.

Note: PHP automatically sets this option to TRUE, this should only be changed for debugging purposes.

 
CURLOPT_NOSIGNAL TRUE to ignore any CURL function that causes a signal to be sent to the PHP process. This is turned on by default in multi-threaded SAPIs so timeout options can still be used. Added in CURL 7.10.
CURLOPT_POST TRUE to do a regular HTTP POST. This POST is the normal application/x-www-form-urlencoded kind, most commonly used by HTML forms.  
CURLOPT_PUT TRUE to HTTP PUT a file. The file to PUT must be set with CURLOPT_INFILE and CURLOPT_INFILESIZE.  
CURLOPT_RETURNTRANSFER TRUE to return the transfer as a string of the return value of curl_exec() instead of outputting it out directly.  
CURLOPT_SSL_VERIFYPEER FALSE to stop CURL from verifying the peer's certificate. Alternate certificates to verify against can be specified with the CURLOPT_CAINFO option or a certificate directory can be specified with the CURLOPT_CAPATH option. CURLOPT_SSL_VERIFYHOST may also need to be TRUE or FALSE if CURLOPT_SSL_VERIFYPEER is disabled (it defaults to 2). TRUE by default as of CURL 7.10. Default bundle installed as of CURL 7.10.
CURLOPT_TRANSFERTEXT TRUE to use ASCII mode for FTP transfers. For LDAP, it retrieves data in plain text instead of HTML. On Windows systems, it will not set STDOUT to binary mode.  
CURLOPT_UNRESTRICTED_AUTH TRUE to keep sending the username and password when following locations (using CURLOPT_FOLLOWLOCATION), even when the hostname has changed.  
CURLOPT_UPLOAD TRUE to prepare for an upload.  
CURLOPT_VERBOSE TRUE to output verbose information. Writes output to STDERR, or the file specified using CURLOPT_STDERR.  

value should be an integer for the following values of the option parameter:

OptionSet value toNotes
CURLOPT_BUFFERSIZE The size of the buffer to use for each read. There is no guarantee this request will be fulfilled, however. Added in CURL 7.10.
CURLOPT_CLOSEPOLICY Either CURLCLOSEPOLICY_LEAST_RECENTLY_USED or CURLCLOSEPOLICY_OLDEST. There are three other CURLCLOSEPOLICY_ constants, but CURL does not support them yet.  
CURLOPT_CONNECTTIMEOUT The number of seconds to wait whilst trying to connect. Use 0 to wait indefinitely.  
CURLOPT_DNS_CACHE_TIMEOUT The number of seconds to keep DNS entries in memory. This option is set to 120 (2 minutes) by default.  
CURLOPT_FTPSSLAUTH The FTP authentication method (when is activated): CURLFTPAUTH_SSL (try SSL first), CURLFTPAUTH_TLS (try TLS first), or CURLFTPAUTH_DEFAULT (let CURL decide). Added in CURL 7.12.2 and available since PHP 5.1.0
CURLOPT_HTTP_VERSION CURL_HTTP_VERSION_NONE (default, lets CURL decide which version to use), CURL_HTTP_VERSION_1_0 (forces HTTP/1.0), or CURL_HTTP_VERSION_1_1 (forces HTTP/1.1).  
CURLOPT_HTTPAUTH

The HTTP authentication method(s) to use. The options are: CURLAUTH_BASIC, CURLAUTH_DIGEST, CURLAUTH_GSSNEGOTIATE, CURLAUTH_NTLM, CURLAUTH_ANY, and CURLAUTH_ANYSAFE.

You can use the bitwise | (or) operator to combine more than one method. If you do this, CURL will poll the server to see what methods it supports and pick the best one.

CURLAUTH_ANY is an alias for CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_GSSNEGOTIATE | CURLAUTH_NTLM.

CURLAUTH_ANYSAFE is an alias for CURLAUTH_DIGEST | CURLAUTH_GSSNEGOTIATE | CURLAUTH_NTLM.

 
CURLOPT_INFILESIZE The expected size, in bytes, of the file when uploading a file to a remote site.  
CURLOPT_LOW_SPEED_LIMIT The transfer speed, in bytes per second, that the transfer should be below during CURLOPT_LOW_SPEED_TIME seconds for PHP to consider the transfer too slow and abort.  
CURLOPT_LOW_SPEED_TIME The number of seconds the transfer should be below CURLOPT_LOW_SPEED_LIMIT for PHP to consider the transfer too slow and abort.  
CURLOPT_MAXCONNECTS The maximum amount of persistent connections that are allowed. When the limit is reached, CURLOPT_CLOSEPOLICY is used to determine which connection to close.  
CURLOPT_MAXREDIRS The maximum amount of HTTP redirections to follow. Use this option alongside CURLOPT_FOLLOWLOCATION.  
CURLOPT_PORT An alternative port number to connect to.  
CURLOPT_PROXYAUTH The HTTP authentication method(s) to use for the proxy connection. Use the same bitmasks as described in CURLOPT_HTTPAUTH. For proxy authentication, only CURLAUTH_BASIC and CURLAUTH_NTLM are currently supported. Added in CURL 7.10.7 and PHP 5.1.0.
CURLOPT_PROXYPORT The port number of the proxy to connect to. This port number can also be set in CURLOPT_PROXY.  
CURLOPT_PROXYTYPE Either CURLPROXY_HTTP (default) or CURLPROXY_SOCKS5. Added in CURL 7.10.
CURLOPT_RESUME_FROM The offset, in bytes, to resume a transfer from.  
CURLOPT_SSL_VERIFYHOST 1 to check the existence of a common name in the SSL peer certificate. 2 to check the existence of a common name and also verify that it matches the hostname provided.  
CURLOPT_SSLVERSION The SSL version (2 or 3) to use. By default PHP will try to determine this itself, although in some cases you must set this manually.  
CURLOPT_TIMECONDITION How CURLOPT_TIMEVALUE is treated. Use CURL_TIMECOND_IFMODSINCE to return the page only if it has been modified since the time specified in CURLOPT_TIMEVALUE. If it hasn't been modified, a "304 Not Modified" header will be returned assuming CURLOPT_HEADER is TRUE. Use CURL_TIMECOND_ISUNMODSINCE for the reverse effect. CURL_TIMECOND_IFMODSINCE is the default. Added in PHP 5.1.0.
CURLOPT_TIMEOUT The maximum number of seconds to allow CURL functions to execute.  
CURLOPT_TIMEVALUE The time in seconds since January 1st, 1970. The time will be used by CURLOPT_TIMECONDITION. By default, CURL_TIMECOND_IFMODSINCE is used.  

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

OptionSet value toNotes
CURLOPT_CAINFO The name of a file holding one or more certificates to verify the peer with. This only makes sense when used in combination with CURLOPT_SSL_VERIFYPEER.  
CURLOPT_CAPATH A directory that holds multiple CA certificates. Use this option alongside CURLOPT_SSL_VERIFYPEER.  
CURLOPT_COOKIE The contents of the "Set-Cookie: " header to be used in the HTTP request.  
CURLOPT_COOKIEFILE 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_COOKIEJAR The name of a file to save all internal cookies to when the connection closes.  
CURLOPT_CUSTOMREQUEST A custom request method to use instead of "GET" or "HEAD" when doing a HTTP request. This is useful for doing "DELETE" or other, more obscure HTTP requests. Valid values are things like "GET", "POST", "CONNECT" 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.

Note: Don't do this without making sure your server supports the custom request method first.

 
CURLOPT_EGBSOCKET Like CURLOPT_RANDOM_FILE, except a filename to an Entropy Gathering Daemon socket.  
CURLOPT_ENCODING The contents of the "Accept-Encoding: " header. This enables decoding of the response. Supported encodings are "identity", "deflate", and "gzip". If an empty string, "", is set, a header containing all supported encoding types is sent.  
CURLOPT_FTPPORT 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_INTERFACE The name of the outgoing network interface to use. This can be an interface name, an IP address or a host name.  
CURLOPT_KRB4LEVEL The KRB4 (Kerberos 4) security level. Any of the following values (in order from least to most powerful) are valid: "clear", "safe", "confidential", "private".. If the string does not match one of these, "private" is used. Setting this option to NULL will disable KRB4 security. Currently KRB4 security only works with FTP transactions.  
CURLOPT_POSTFIELDS The full data to post in a HTTP "POST" operation.  
CURLOPT_PROXY The HTTP proxy to tunnel requests through.  
CURLOPT_PROXYUSERPWD A username and password formatted as "[username]:[password]" to use for the connection to the proxy.  
CURLOPT_RANDOM_FILE A filename to be used to seed the random number generator for SSL.  
CURLOPT_RANGE Range(s) of data to retrieve in the format "X-Y" where X or Y are optional. HTTP transfers also support several intervals, separated with commas in the format "X-Y,N-M".  
CURLOPT_REFERER The contents of the "Referer: " header to be used in a HTTP request.  
CURLOPT_SSL_CIPHER_LIST A list of ciphers to use for SSL. For example, RC4-SHA and TLSv1 are valid cipher lists.  
CURLOPT_SSLCERT The name of a file containing a PEM formatted certificate.  
CURLOPT_SSLCERTPASSWD The password required to use the CURLOPT_SSLCERT certificate.  
CURLOPT_SSLCERTTYPE The format of the certificate. Supported formats are "PEM" (default), "DER", and "ENG". Added in CURL 7.9.3.
CURLOPT_SSLENGINE The identifier for the crypto engine of the private SSL key specified in CURLOPT_SSLKEY.  
CURLOPT_SSLENGINE_DEFAULT The identifier for the crypto engine used for asymmetric crypto operations.  
CURLOPT_SSLKEY The name of a file containing a private SSL key.  
CURLOPT_SSLKEYPASSWD The secret password needed to use the private SSL key specified in CURLOPT_SSLKEY.

Note: Since this option contains a sensitive password, remember to keep the PHP script it is contained within safe.

 
CURLOPT_SSLKEYTYPE The key type of the private SSL key specified in CURLOPT_SSLKEY. Supported key types are "PEM" (default), "DER", and "ENG".  
CURLOPT_URL The URL to fetch. You can also set this when initializing a session with curl_init().  
CURLOPT_USERAGENT The contents of the "User-Agent: " header to be used in a HTTP request.  
CURLOPT_USERPWD A username and password formatted as "[username]:[password]" to use for the connection.  

value should be an array for the following values of the option parameter:

OptionSet value toNotes
CURLOPT_HTTP200ALIASES An array of HTTP 200 responses that will be treated as valid responses and not as errors. Added in CURL 7.10.3.
CURLOPT_HTTPHEADER An array of HTTP header fields to set.  
CURLOPT_POSTQUOTE An array of FTP commands to execute on the server after the FTP request has been performed.  
CURLOPT_QUOTE An array of FTP commands to execute on the server prior to the FTP request.  

value should be a stream resource (using fopen(), for example) for the following values of the option parameter:

OptionSet value toNotes
CURLOPT_FILE The file that the transfer should be written to. The default is STDOUT (the browser window).  
CURLOPT_INFILE The file that the transfer should be read from when uploading.  
CURLOPT_STDERR An alternative location to output errors to instead of STDERR.  
CURLOPT_WRITEHEADER The file that the header part of the transfer is written to.  

value should be a string that is the name of a valid callback function for the the following values of the option parameter:

OptionSet value toNotes
CURLOPT_HEADERFUNCTION The name of a callback function where the callback function takes two parameters. The first is the CURL resource, the second is a string with the header data to be written. Using this callback function, it becomes your responsibility to write the header data. Return the number of bytes written.  
CURLOPT_PASSWDFUNCTION The name of a callback function where the callback function takes three parameters. The first is the CURL resource, the second is a string containing a password prompt, and the third is the maximum password length. Return the string containing the password.  
CURLOPT_READFUNCTION The name of a callback function where the callback function takes two parameters. The first is the CURL resource, and the second is a string with the data to be read. Using this callback function, it becomes your responsibility to read the data. Return the number of bytes read. Return 0 to signal EOF.  
CURLOPT_WRITEFUNCTION The name of a callback function where the callback function takes two parameters. The first is the CURL resource, and the second is a string with the data to be written. Using this callback function, it becomes your responsibility to write the data. Must return the exact number of bytes written or this will fail.  

Example 1. Initializing a new CURL session and fetching a webpage

<?php
// create a new CURL resource
$ch = curl_init();

// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch, CURLOPT_HEADER, false);

// grab URL and pass it to the browser
curl_exec($ch);

// close CURL resource, and free up system resources
curl_close($ch);
?>

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