PHP CURL Chinese Description

1.CURL is an open source file Transfer tool that works with URL syntax in the command line mode.

2. It is widely used in Unix, multiple Linux distributions, and has a ported version of DOS and Win32, Win64.

3. It supports many protocols: FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE, and LDAP.

4.CURL was developed by the Swedish Curll organization and you can visit: Http://curl.haxx. SE gets its source code and related instructions.

5.PHP Curl Function List:

Function

Describe

Curl_close ()	Closes a curl session.
Curl_copy_handle ()	Copy a curl handle and all of its options.
Curl_errno ()	Returns the last error number.
Curl_error ()	Returns a string that secures the most recent error in the current session.
Curl_escape ()	Returns an escaped string that is URL-encoded for the given string.
Curl_exec ()	Performs a curl session.
Curl_file_create ()	Creates a Curlfile object.
Curl_getinfo ()	Gets the information for a Curl connection resource handle.
Curl_init ()	Initializes a curl session.
Curl_multi_add_handle ()	Adds a separate curl handle to the curl batch session.
Curl_multi_close ()	Closes a set of curl handles.
Curl_multi_exec ()	The child connection that runs the current CURL handle.
Curl_multi_getcontent ()	If Curlopt_returntransfer is set, the text stream of the obtained output is returned.
Curl_multi_info_read ()	Gets the related transport information for the currently resolved curl.
Curl_multi_init ()	Returns a new curl batch handle.
Curl_multi_remove_handle ()	Removes a handle resource from the Curl batch handle resource.
Curl_multi_select ()	Wait for active connections in all Curl batches.
Curl_multi_setopt ()	Set up a batch curl transfer option.
Curl_multi_strerror ()	Returns a string literal that describes the error code.
Curl_pause ()	Pause and resume the connection.
Curl_reset ()	Resets all options for the Libcurl session handle.
Curl_setopt_array ()	Bulk setup options for the Curl transfer session.
curl_setopt ()	Set a curl transfer option.
Curl_share_close ()	Close the curl shared handle.
Curl_share_init ()	Initializes a curl shared handle.
Curl_share_setopt ()	Sets the curl Transfer option for a shared handle.
Curl_strerror ()	Returns a string description of the error code.
Curl_unescape ()	Decodes a URL-encoded string.
Curl_version ()	Gets the Curl version information.

Basic Steps for 6.CURL development

(1) Initialization: Curl_init ()

(2) Set Variable: curl_setopt () or Curl_setopt_array ()

(3) Execute and get results: curl_exec ()

(4) Release curl handle: Curl_close ()

7.CURLOPT Parameter Summary:

Curlopt_autoreferer
Automatically set the Referer information in the header

Curlopt_binarytransfer
Gets the data back when Curlopt_returntransfer is enabled

Curlopt_cookiesession
When enabled, Curl simply passes a session cookie, ignoring other cookies, and by default, curl returns all cookies to the server. Session cookies are cookies that are used to determine if the session on the server is valid.

Curlopt_crlf
Converts a Unix newline character to a carriage return line break when enabled.

Curlopt_dns_use_global_cache
When enabled, a global DNS cache is enabled, which is thread-safe and is true by default.

Curlopt_failonerror
Displays the HTTP status code, with the default behavior of ignoring HTTP messages with numbers less than or equal to 400

Curlopt_filetime
When enabled, attempts to modify the information in the remote document. The resulting information is returned through the curlinfo_filetime option of the Curl_getinfo () function.

Curlopt_followlocation
When enabled, the "location:" returned by the server server is returned to the server recursively in the header, using Curlopt_maxredirs to limit the number of recursive returns.

Curlopt_forbid_reuse
Forced disconnection after completion of the interaction, cannot be reused.

Curlopt_fresh_connect
Forces a new connection to be taken in place of the connection in the cache.

Curlopt_ftp_use_eprt

Curlopt_ftp_use_epsv

Curlopt_ftpappend

Curlopt_ftpascii

Curlopt_ftplistonly

Curlopt_header
When enabled, the information for the header file is output as a data stream.

Curlopt_httpget
When enabled, the method for HTTP is set to get, because get is the default, so it is used only if it is modified.

Curlopt_httpproxytunnel
When enabled, it is transmitted over an HTTP proxy.

Curlopt_mute
Restores the default values for all modified parameters in the Curl function.

Curlopt_netrc
After the connection is established, access the ~/.NETRC file to get the user name and password information to connect to the remote site.

Curlopt_nobody
When enabled, the body portion of the HTML is not output.

Curlopt_noprogress
Turns off the progress bar of the curl transfer when enabled, and the default setting for this item is true

Curlopt_nosignal
When enabled, ignores all the signals that curl passes to PHP. This entry is turned on by default when SAPI multi-threaded transmissions.

Curlopt_post
When enabled, a regular post request is sent with the type: application/x-www-form-urlencoded, just as the form was submitted.

Curlopt_put
Allow HTTP to send files when enabled, you must set both Curlopt_infile and Curlopt_infilesize

Curlopt_returntransfer
The information obtained by CURL_EXEC () is returned in the form of a file stream, rather than as a direct output.

Curlopt_ssl_verifypeer

Curlopt_transfertext

Curlopt_unrestricted_auth
The user name and password information is continuously appended to multiple locations in the header generated by using curlopt_followlocation, even if the domain name has changed.

Curlopt_upload
Allow file transfer when enabled

Curlopt_verbose
All information is reported when enabled and stored in stderr or specified curlopt_stderr

Curlopt_buffersize
Each time the retrieved data is read into the cache size, the value is filled every time.

Curlopt_closepolicy
Not curlclosepolicy_least_recently_used is curlclosepolicy_oldest, there are three other, but Curl is not supported for the time being.

Curlopt_connecttimeout
The time to wait before initiating the connection, and if set to 0, do not wait.

Curlopt_dns_cache_timeout
Sets the time to save DNS information in memory by default of 120 seconds.

Curlopt_ftpsslauth

Curlopt_http_version
Set Curl to use the HTTP protocol, Curl_http_version_none (let CURL himself judge), Curl_http_version_1_0 (http/1.0), Curl_http_version_1_1 (http/ 1.1)

Curlopt_httpauth
The optional values for the HTTP authentication method used are: Curlauth_basic,curlauth_digest,curlauth_gssnegotiate,curlauth_ntlm,curlauth_any,curlauth_ Anysafe, you can use the "|" operator to separate multiple values, curl allows the server to select one of the best supported values, Curlauth_any equivalent to Curlauth_basic | Curlauth_digest | Curlauth_gssnegotiate | Curlauth_ntlm,curlauth_anysafe equivalent to Curlauth_digest | Curlauth_gssnegotiate | Curlauth_ntlm

Curlopt_infilesize
Set the size of the upload file

Curlopt_low_speed_limit
When the transfer speed is less than Curlopt_low_speed_limit, PHP determines whether the transmission is canceled because it is too slow, depending on the curlopt_low_speed_time.

Curlopt_low_speed_time
The number of seconds the transfer should is below Curlopt_low_speed_limit for PHP to consider the transfer too slow and a Bort.
When the transfer speed is less than Curlopt_low_speed_limit, PHP determines whether the transmission is canceled because it is too slow, depending on the curlopt_low_speed_time.

Curlopt_maxconnects
The maximum number of connections allowed, over the Curlopt_closepolicy, determines which connections should be stopped

Curlopt_maxredirs
Specify the maximum number of HTTP redirects that are used with curlopt_followlocation.

Curlopt_port
An optional amount to specify the connection port

Curlopt_proxyauth

Curlopt_proxyport

Curlopt_proxytype

Curlopt_resume_from
Pass a byte offset (used to resume a breakpoint) when the transfer is resumed

Curlopt_ssl_verifyhost

Curlopt_sslversion

Curlopt_timecondition
If edited after a time specified by Curlopt_timevalue, returns a page using Curl_timecond_ifmodsince, if it has not been modified, and Curlopt_header is true, returns a 304 not Modified "Header,curlopt_header is false, the curl_timecond_isunmodsince is used, and the default value is Curl_timecond_ifmodsince

Curlopt_timeout
Set the maximum number of seconds that curl is allowed to execute

Curlopt_timevalue
Set the timestamp used by a curlopt_timecondition, using curl_timecond_ifmodsince in the default state

Curlopt_cainfo

Curlopt_capath

Curlopt_cookie
Set the contents of the "Set-cookie:" section of the HTTP request.

Curlopt_cookiefile
The name of the file containing the cookie information, which can be the header information in Netscape format or HTTP style.

Curlopt_cookiejar
The name of the file holding the cookie information after the connection is closed

Curlopt_customrequest

Curlopt_egbsocket

Curlopt_encoding
The contents of the "Accept-encoding:" section of the header are supported in the following encoding formats: "Identity", "deflate", "gzip". If set to an empty string, it means that all encoding formats are supported

Curlopt_ftpport

Curlopt_interface
The name used in the external network interface, which can be an interface name, IP, or host name.

Curlopt_krb4level
KRB4 (Kerberos 4) Security level setting, can be one of several values: "Clear", "safe", "confidential", "private". The default value is "Private", which is set to NULL when KRB4 is disabled, and now KRB4 security can only be used in FTP transport.

Curlopt_postfields
The "POST" operation in HTTP. If you want to transfer a file, you need a filename at the start of the @

Curlopt_proxy
Setting up an HTTP proxy server through

Curlopt_proxyuserpwd
The user name and password in the format "[Username]:[password]" connected to the proxy server.

Curlopt_random_file
Set the file name of the random number seed used to hold SSL

Curlopt_range
Set the HTTP transmission range, you can set a transmission interval in the form of "X-y", if there are multiple HTTP transmissions, use commas to separate multiple values, such as: "X-y,n-m".

Curlopt_referer
Sets the value of the "Referer:" section in the header.

Curlopt_ssl_cipher_list

Curlopt_sslcert
Pass a string containing a certificate in PEM format.

curlopt_sslcertpasswd
Pass a password that contains the required use of the Curlopt_sslcert certificate.

Curlopt_sslcerttype

Curlopt_sslengine

Curlopt_sslengine_default

Curlopt_sslkey

curlopt_sslkeypasswd

Curlopt_sslkeytype

Curlopt_url
The URL address you need to get, or you can set it in PHP's Curl_init () function.

Curlopt_useragent
A string that contains a "user-agent" header in the HTTP request.

Curlopt_userpwd
Pass in a connection the user name and password required in the format: "[Username]:[password]".

Curlopt_http200aliases
Sets the response to HTTP 200, which is no longer handled as error, in the form of an array.

Curlopt_httpheader
Sets an array of contents to transfer in a header.

Curlopt_postquote

Curlopt_quote

Curlopt_file
Sets the location of the output file, the value is a resource type, and the default is stdout (browser).

Curlopt_infile
The file address to be read when uploading the file, the value is a resource type.

Curlopt_stderr
Sets an error output address, which is a resource type that supersedes the default stderr.

Curlopt_writeheader
Sets the file address to write the header portion of the content, and the value is a resource type.

Curlopt_headerfunction
Set a callback function that has two parameters, the first is the resource handle for curl, and the second is the header data for the output. The output of the header data must rely on this function to return the size of the data that has been written.

Curlopt_passwdfunction
Set a callback function with three parameters, the first one is the resource handle for curl, the second is a password prompt, and the third parameter is the maximum allowed for the password length. Returns the value of the password.

Curlopt_readfunction
Set a callback function with two parameters, the first is the resource handle for curl, and the second is the data to be read. Data reads must depend 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 resource handle for curl, and the second is the data to be written. Data writes must depend on this function. Returns the exact size of the written data

8.CURLINFO Parameter Summary:

Curlinfo_effective_url
The last valid URL address

Curlinfo_http_code
The last HTTP code received

Curlinfo_filetime
The time that the document was retrieved remotely, and the return value is "1" if it cannot be obtained

Curlinfo_total_time
Time spent on the last transmission

Curlinfo_namelookup_time
Time consumed by name resolution

Curlinfo_connect_time
Time spent establishing a connection

Curlinfo_pretransfer_time
The time to use from establishing a connection to preparing the transfer

Curlinfo_starttransfer_time
The time used to start the connection to the transfer

Curlinfo_redirect_time
The time that the redirect was used before the transaction transfer started

Curlinfo_size_upload
Total amount of uploaded data

Curlinfo_size_download
Total amount of downloaded data

Curlinfo_speed_download
Average download speed

Curlinfo_speed_upload
Average upload speed

Curlinfo_header_size
The size of the header section

Curlinfo_header_out
Send the requested string

Curlinfo_request_size
The size of the request that has the problem in the HTTP request

Curlinfo_ssl_verifyresult

Curlinfo_content_length_download
Download content length read from Content-length:field

Curlinfo_content_length_upload
Description of upload content size

Curlinfo_content_type
Download the "Content-type" value of the content, NULL indicates that the server did not send a valid "Content-type:header"

