The parameters that can be set are:
CURLOPT_AUTOREFERER
Automatically set the referer information in the header
CURLOPT_BINARYTRANSFER
When CURLOPT_RETURNTRANSFER is enabled, the data will be returned
CURLOPT_COOKIESESSION
When enabled, curl will only pass a session cookie and ignore others cookie, default In this case curl will return all cookies to the server. Session cookies refer to cookies that are used to determine whether the server-side session is valid.
CURLOPT_CRLF
When enabled, convert Unix line feed characters into carriage return and line feed characters.
CURLOPT_DNS_USE_GLOBAL_CACHE
When enabled, a global DNS cache is enabled. This item is thread-safe and defaults to true.
CURLOPT_FAILONERROR
Displays the HTTP status code. The default behavior is to ignore HTTP information with a number less than or equal to 400.
CURLOPT_FILETIME
When enabled, it will try to modify the information in the remote document. The result information will be returned through the CURLINFO_FILETIME option of the curl_getinfo() function.
CURLOPT_FOLLOWLOCATION
When enabled, the "Location:" returned by the server will be placed in the header and returned to the server recursively. Use CURLOPT_MAXREDIRS to limit the number of recursive returns.
CURLOPT_FORBID_REUSE
Forcibly disconnect after completing the interaction and cannot be reused.
CURLOPT_FRESH_CONNECT
Force a new connection to replace the one in the cache.
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.
Added in PHP 5.0.0.
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
When enabled, the header file information will be output as a data stream.
CURLOPT_HTTPGET
When enabled, the HTTP method will be set to GET. Because GET is the default, it is only used when it is modified.
CURLOPT_HTTPPROXYTUNNEL
When enabled, it will be transmitted through HTTP proxy.
CURLOPT_MUTE
Restore all modified parameters in the curl function to their default values.
CURLOPT_NETRC
After the connection is established, access the ~/.netrc file to obtain the username and password information to connect to the remote site.
CURLOPT_NOBODY
When enabled, the body part in HTML will not be output.
CURLOPT_NOPROGRESS
Turn off the progress bar of curl transmission when enabled. The default setting of this item is true
CURLOPT_NOSIGNAL
Ignore all signals passed by curl to PHP when enabled. This item is turned on by default during SAPI multi-thread transmission.
CURLOPT_POST
When enabled, a regular POST request will be sent of type: application/x-www-form-urlencoded, just like a form submission.
CURLOPT_PUT
When enabled, HTTP is allowed to send files. CURLOPT_INFILE and CURLOPT_INFILESIZE must be set at the same time.
CURLOPT_RETURNTRANSFER
The information obtained by curl_exec() is returned in the form of a file stream instead of being output 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. in plain text instead of HTML. On Windows systems, it will not set STDOUT to binary mode.
CURLOPT_UNRESTRICTED_AUTH
Continuously append username and password information to multiple locations in the header generated using CURLOPT_FOLLOWLOCATION, even if the domain name has changed.
CURLOPT_UPLOAD
Allows file transfer when enabled
CURLOPT_VERBOSE
When enabled, all information will be reported and stored in STDERR or the specified CURLOPT_STDERR
CURLOPT_BUFFERSIZE
The size of the cache is read each time the data is obtained, and this value will be filled every time .
CURLOPT_CLOSEPOLICY
It is either CURLCLOSEPOLICY_LEAST_RECENTLY_USED or CURLCLOSEPOLICY_OLDEST. There are three others, but curl does not support them yet. .
CURLOPT_CONNECTTIMEOUT
The time to wait before initiating a connection. If set to 0, there will be no waiting.
CURLOPT_DNS_CACHE_TIMEOUT
Set the time to save DNS information in memory, the default is 120 seconds.
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).
CURLOPT_HTTP_VERSION
Set the HTTP protocol used by curl, CURL_HTTP_VERSION_NONE (let curl myself Judgment), CURL_HTTP_VERSION_1_0 (HTTP/1.0), CURL_HTTP_VERSION_1_1 (HTTP/1.1)
CURLOPT_HTTPAUTH
The HTTP verification method used, the optional values ??are: CURLAUTH_BASIC, CURLAUTH_DIGEST, CURLAUTH_GSSNEGOTIATE, CURLAUTH_NTLM, CURLAUTH_ANY, CURLAU TH_ANYSAFE, you can use the "|" operator Separate multiple values, curl lets the server choose the one with the best support, CURLAUTH_ANY is equivalent to CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_GSSNEGOTIATE | CURLAUTH_NTLM, CURLAUTH_ANYSAFE is equivalent to CURLAUTH_DIGEST | CURLAUTH_GSSNEGOTIATE | CURLAUTH_NTLM
CURLOPT_INFILESIZE
Set the size of the uploaded file
CURLOPT_LOW_SPEED_LIMIT
When the transfer speed is less than CURLOPT_LOW_SPEED_LIMIT, PHP will use CURLOPT_LOW_SPEED_TIME to determine whether to cancel the transfer because it is too slow.
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 number of connections allowed. If exceeded, CURLOPT_CLOSEPOLICY will be used to determine which connections should be stopped.
CURLOPT_MAXREDIRS
Specify the maximum number of HTTP redirects. This option is used together with CURLOPT_FOLLOWLOCATION.
CURLOPT_PORT
An optional quantity used to specify the connection port
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
CURLOPT_PROXYPORT
The port number of the proxy to connect to. (Used to resume downloading from breakpoints)
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 this must be set manually.
CURLOPT_TIMECONDITION
If edited after a certain time specified by CURLOPT_TIMEVALUE, use CURL_TIMECOND_IFMODSINCE to return If the page has not been modified and CURLOPT_HEADER is true, a "304 Not Modified" header will be returned. If CURLOPT_HEADER is false, CURL_TIMECOND_ISUNMODSINCE will be used. The default value is CURL_TIMECOND_IFMODSINCE
CURLOPT_TIMEOUT
Set the maximum number of seconds curl is allowed to execute
CURLOPT_TIMEVALUE
Set a timestamp used by CURLOPT_TIMECONDITION. By default, CURL_TIMECOND_IFMODSINCE is used.
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
Set the content of the "Set-Cookie:" part of the HTTP request.
CURLOPT_COOKIEFILE
The name of the file containing cookie information. This cookie file can be Netscape format or HTTP style header information.
CURLOPT_COOKIEJAR
The name of the file that stores cookie information after the connection is closed
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/1.0rnrn" would be incorrect.
Note: Don't do this without making sure the 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 content of the "Accept-Encoding:" part of the header. The supported encoding formats are: "identity", "deflate", "gzip".如果設(shè)置為空字符串，則表示支持所有的編碼格式
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
在外部網(wǎng)絡(luò)接口中使用的名稱，可以是一個(gè)接口名，IP或者主機(jī)名。
CURLOPT_KRB4LEVEL
KRB4(Kerberos 4)安全級(jí)別的設(shè)置，可以是一下幾個(gè)值之一："clear"，"safe"，"confidential"，"private"。默認(rèn)的值 為"private"，設(shè)置為null的時(shí)候表示禁用KRB4，現(xiàn)在KRB4安全僅能在FTP傳輸中使用。
CURLOPT_POSTFIELDS
在HTTP中的“POST”操作。如果要傳送一個(gè)文件，需要一個(gè)@開頭的文件名
CURLOPT_PROXY
設(shè)置通過的HTTP代理服務(wù)器
CURLOPT_PROXYUSERPWD
連接到代理服務(wù)器的，格式為“[username]:[password]”的用戶名和密碼。
CURLOPT_RANDOM_FILE
設(shè)定存放SSL用到的隨機(jī)數(shù)種子的文件名稱
CURLOPT_RANGE
設(shè)置HTTP傳輸范圍，可以用“X-Y”的形式設(shè)置一個(gè)傳輸區(qū)間，如果有多個(gè)HTTP傳輸，則使用逗號(hào)分隔多個(gè)值，形如："X-Y,N-M"。
CURLOPT_REFERER
設(shè)置header中"Referer: " 部分的值。
CURLOPT_SSL_CIPHER_LIST
A list of ciphers to use for SSL. For example, RC4-SHA and TLSv1 are valid cipher lists.
CURLOPT_SSLCERT
傳遞一個(gè)包含PEM格式證書的字符串。
CURLOPT_SSLCERTPASSWD
傳遞一個(gè)包含使用CURLOPT_SSLCERT證書必需的密碼。
CURLOPT_SSLCERTTYPE
The format of the certificate. Supported formats are "PEM" (default), "DER", and "ENG".
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
需要獲取的URL地址，也可以在PHP的curl_init()函數(shù)中設(shè)置。
CURLOPT_USERAGENT
在HTTP請(qǐng)求中包含一個(gè)”user-agent”頭的字符串。
CURLOPT_USERPWD
傳遞一個(gè)連接中需要的用戶名和密碼，格式為：“[username]:[password]”。
CURLOPT_HTTP200ALIASES
設(shè)置不再以error的形式來處理HTTP 200的響應(yīng)，格式為一個(gè)數(shù)組。
CURLOPT_HTTPHEADER
設(shè)置一個(gè)header中傳輸內(nèi)容的數(shù)組。
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.
CURLOPT_FILE
設(shè)置輸出文件的位置，值是一個(gè)資源類型，默認(rèn)為STDOUT (瀏覽器)。
CURLOPT_INFILE
在上傳文件的時(shí)候需要讀取的文件地址，值是一個(gè)資源類型。
CURLOPT_STDERR
設(shè)置一個(gè)錯(cuò)誤輸出地址，值是一個(gè)資源類型，取代默認(rèn)的STDERR。
CURLOPT_WRITEHEADER
設(shè)置header部分內(nèi)容的寫入的文件地址，值是一個(gè)資源類型。
CURLOPT_HEADERFUNCTION
設(shè)置一個(gè)回調(diào)函數(shù)，這個(gè)函數(shù)有兩個(gè)參數(shù)，第一個(gè)是curl的資源句柄，第二個(gè)是輸出的header數(shù)據(jù)。header數(shù)據(jù)的輸出必須依賴這個(gè)函數(shù)，返回已寫入的數(shù)據(jù)大小。
CURLOPT_PASSWDFUNCTION
設(shè)置一個(gè)回調(diào)函數(shù)，有三個(gè)參數(shù)，第一個(gè)是curl的資源句柄，第二個(gè)是一個(gè)密碼提示符，第三個(gè)參數(shù)是密碼長度允許的最大值。返回密碼的值。
CURLOPT_READFUNCTION
設(shè)置一個(gè)回調(diào)函數(shù)，有兩個(gè)參數(shù)，第一個(gè)是curl的資源句柄，第二個(gè)是讀取到的數(shù)據(jù)。數(shù)據(jù)讀取必須依賴這個(gè)函數(shù)。返回讀取數(shù)據(jù)的大小，比如0或者EOF。
CURLOPT_WRITEFUNCTION
設(shè)置一個(gè)回調(diào)函數(shù)，有兩個(gè)參數(shù)，第一個(gè)是curl的資源句柄，第二個(gè)是寫入的數(shù)據(jù)。數(shù)據(jù)寫入必須依賴這個(gè)函數(shù)。返回精確的已寫入數(shù)據(jù)的大小

curl_copy_handle()函數(shù)的作用是拷貝一個(gè)curl連接資源的所有內(nèi)容和參數(shù)