Currently the most comprehensive Chinese description of CURL under adobe acrobat 7.0 professional php

CURL function library (Client URL Library Function) in PHP
curl_close — close a curl session
curl_copy_handle — copy all contents and parameters of a curl connection resource
curl_errno — return a numeric number containing error information of the current session
curl_error — return a A string containing error information for the current session
curl_exec — Execute a curl session
curl_getinfo — Get information about a curl connection resource handle
curl_init — Initialize a curl session
curl_multi_add_handle — Add a separate curl handle resource to a curl batch session
curl_multi_close — Close a batch handle resource
curl_multi_exec — Parse a curl batch handle
curl_multi_getcontent — Return the text stream of the obtained output
curl_multi_info_read — Get the relevant transmission information of the currently parsed curl
curl_multi_init — Initialize a curl batch handle resource
curl_multi_remove_handle — Remove a handle resource in the curl batch handle resource
curl_multi_select — Get all the sockets associated with the cURL extension, which can then be "selected"
curl_setopt_array — Set session parameters for a curl in the form of an array
curl_setopt — Set session parameters for a curl
curl_version — Get curl-related version information
The role of the curl_init() function is to initialize a curl session. The only parameter of the curl_init() function is optional and represents a URL address.
The curl_exec() function is used to execute a curl session. The only parameter is the handle returned by the curl_init() function.
The curl_close() function is used to close a curl session. The only parameter is the handle returned by the curl_init() function.
$ch = curl_init("http://www.baidu.com/");
curl_exec($ch);
curl_close($ch);
?>
curl_version() function It is to obtain curl-related version information. The curl_version() function has a parameter. It is not clear what it does.
print_r(curl_version())
?>
curl_getinfo() function is to obtain a curl connection. Resource handle information, the curl_getinfo() function has two parameters. The first parameter is the resource handle of curl, and the second parameter is the following constants:
$ch = curl_init("http://www .baidu.com/");
print_r(curl_getinfo($ch));
?>
Optional constants include:
CURLINFO_EFFECTIVE_URL
Last valid url address
CURLINFO_HTTP_CODE
Last received HTTP code
CURLINFO_FILETIME
The time to obtain the document remotely, if it cannot be obtained, the return value is "-1"
CURLINFO_TOTAL_TIME
The time spent on the last transmission
CURLINFO_NAMELOOKUP_TIME
The time spent on name resolution
CURLINFO_CONNECT_TIME
The time spent establishing the connection
CURLINFO_PRETRANSFER_TIME
Time from establishing connection to preparation transmission
Curlinfo_Starttransfer_time
The time to use from the beginning of the connection to transmission
Curlinfo_Redirect_time
Reinstance time to Curlinfo_SIZE_UPLOAD
The total value of the data Rlinfo_size_download
Download Total value of data volume
CURLINFO_SPEED_DOWNLOAD
Average download speed
CURLINFO_SPEED_UPLOAD
Average upload speed
CURLINFO_HEADER_SIZE
Size of header part
CURLINFO_HEADER_OUT
String to send request
CURLINFO_REQUEST_SIZE
The size of the request in question in the HTTP request
CURLINFO_SSL_VERIFYRESULT
Result of SSL certification verification requested by setting CURLOPT_SSL_VERIFYPEER
CURLINFO_CONTENT_LENGTH_DOWNLOAD
Download content length read from Content-Length: field
CURLINFO_CONTENT_LENGTH_UPLOAD
Description of upload content size
CURLINFO_CONTENT_TYPE
"Content-type" value of download content, NULL indicates that the server did not send a valid The "Content-Type: header"
curl_setopt() function is used to set session parameters for a curl. The curl_setopt_array() function is used to set session parameters for a curl in the form of an array.
$ch = curl_init();
$fp = fopen("example_homepage.txt", "w");
curl_setopt($ch, CURLOPT_FILE, $fp);
$options = array(
CURLOPT_URL => 'http://www.baidu.com/',
CURLOPT_HEADER => false
);
curl_setopt_array($ch, $options);
curl_exec($ch);
curl_close($ch);
fclose($fp);
?>
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 Just pass a session cookie , ignoring other cookies, curl will return all cookies to the server by default. 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 to obtain a new connection to replace the connection 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. 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. 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
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
Allow 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 into the data obtained each time, 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 itself Judgment), CURL_HTTP_VERSION_1_0 (HTTP/1.0), CURL_HTTP_VERSION_1_1 (HTTP/1.1)
CURLOPT_HTTPAUTH
HTTP verification method used, optional values ​​are: CURLAUTH_BASIC, CURLAUTH_DIGEST, CURLAUTH_GSSNEGOTIATE, CURLAUTH_NTLM, CURLAUTH_ANY, CURL AUTH_ANYSAFE, you can use the "|" operator Separate multiple values, curl lets the server choose the best supported value, 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_INFILESIZ E
Set the size of uploaded files
CURLOPT_LOW_SPEED_LIMIT
When When the transmission speed is less than CURLOPT_LOW_SPEED_LIMIT, PHP will use CURLOPT_LOW_SPEED_TIME to determine whether to cancel the transmission 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 supported.
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.
CURLOPT_RESUME_FROM
Passed when resuming transfer a byte offset (Used to resume downloads 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
"Accept-Encoding:" in the header For some content, the supported encoding formats are: "identity", "deflate", "gzip". If set to an empty string, it means that all encoding formats are supported
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
Use in external network interface The name can be an interface name, IP or host name.
CURLOPT_KRB4LEVEL
KRB4 (Kerberos 4) security level setting can be one of the following values: "clear", "safe", "confidential", "private". The default value is "private". When set to null, KRB4 is disabled. Now KRB4 security can only be used in FTP transmission.
CURLOPT_POSTFIELDS
The "POST" operation in HTTP. If you want to transfer a file, you need a file name starting with @
CURLOPT_PROXY
Set the HTTP proxy server passed
CURLOPT_PROXYUSERPWD
Username and password in the format of "[username]:[password]" to connect to the proxy server.
CURLOPT_RANDOM_FILE
Set the file name to store the random number seeds used by SSL
CURLOPT_RANGE
Set the HTTP transmission range. You can set a transmission range in the form of "X-Y". If there are multiple HTTP transmissions, use commas to separate multiple values. , in the form: "X-Y,N-M".
CURLOPT_REFERER
Set the value of the "Referer: " part in the header.
CURLOPT_SSL_CIPHER_LIST
A list of ciphers to use for SSL. For example, RC4-SHA and TLSv1 are valid cipher lists.
CURLOPT_SSLCERT
Pass a string containing the certificate in PEM format.
CURLOPT_SSLCERTPASSWD
传递一个包含使用CURLOPT_SSLCERT证书必需的密码。
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
需要获取的URL地址，也可以在PHP的curl_init()函数中设置。
CURLOPT_USERAGENT
在HTTP请求中包含一个”user-agent”头的字符串。
CURLOPT_USERPWD
传递一个连接中需要的用户名和密码，格式为：“[username]:[password]”。
CURLOPT_HTTP200ALIASES
Set to no longer handle HTTP 200 responses in the form of error, the format is an array.
CURLOPT_HTTPHEADER
Set an array of transmission content in the header.
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
Set the location and value of the output file Is a resource type, defaults to STDOUT (browser).
CURLOPT_INFILE
The file address that needs to be read when uploading files. The value is a resource type.
CURLOPT_STDERR
Set an error output address, the value is a resource type, replacing the default STDERR.
CURLOPT_WRITEHEADER
Set the file address where the header part is written. The value is a resource type.
CURLOPT_HEADERFUNCTION
Set a callback function. This function has two parameters. The first is the resource handle of curl, and the second is the output header data. The output of header data must rely on this function, which returns the size of the written data.
CURLOPT_PASSWDFUNCTION
Set a callback function with three parameters. The first is the resource handle of curl, the second is a password prompt, and the third parameter is the maximum allowed password length. Returns the value of the password.
CURLOPT_READFUNCTION
Set a callback function with two parameters. The first is the resource handle of curl, and the second is the read data. Data reading must rely on this function. Returns the size of the read data, such as 0 or EOF.
CURLOPT_WRITEFUNCTION
Set a callback function with two parameters, the first is the curl resource handle, and the second is the written data. Data writing must rely on this function. Returns the exact size of the written data
The function of curl_copy_handle() is to copy all the contents and parameters of a curl connection resource
$ch = curl_init("http://www.baidu.com/" );
$another = curl_copy_handle($ch);
curl_exec($another);
curl_close($another);
?> The
curl_error() function is to return a string containing the current session error information. The
curl_errno() function is used to return a numeric number containing the error information of the current session.
The curl_multi_init() function is used to initialize a curl batch handle resource.
The curl_multi_add_handle() function is used to add individual curl handle resources to the curl batch session. The curl_multi_add_handle() function has two parameters. The first parameter represents a curl batch handle resource, and the second parameter represents a separate curl handle resource.
The function of curl_multi_exec() is to parse a curl batch handle. The curl_multi_exec() function has two parameters. The first parameter represents a batch handle resource, and the second parameter is a reference value parameter, indicating that the remaining needs to be processed. The number of individual curl handle resources.
The curl_multi_remove_handle() function represents the removal of a handle resource in the curl batch handle resource. The curl_multi_remove_handle() function has two parameters. The first parameter represents a curl batch handle resource, and the second parameter represents a separate curl. Handle resource.
The curl_multi_close() function is used to close a batch handle resource.
$ch1 = curl_init();
$ch2 = curl_init();
curl_setopt($ch1, CURLOPT_URL, "http://www.baidu.com/");
curl_setopt($ch1, CURLOPT_HEADER , 0);
curl_setopt($ch2, CURLOPT_URL, "http://www.google.com/");
curl_setopt($ch2, CURLOPT_HEADER, 0);
$mh = curl_multi_init();
curl_multi_add_handle($mh ,$ch1);
curl_multi_add_handle($mh,$ch2);
do {
curl_multi_exec($mh,$flag);
} while ($flag > 0);
curl_multi_remove_handle($mh,$ch1);
curl_multi_remove_handle($mh,$ch2);
curl_multi_close($mh);
?>
curl_multi_getcontent() function is to return the text stream of the obtained output when CURLOPT_RETURNTRANSFER is set.
The curl_multi_info_read() function is used to obtain the relevant transmission information of the currently parsed curl.
curl_multi_select()
Get all the sockets associated with the cURL extension, which can then be "selected"

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