Explanation of curl-related functions in PHP

The curl-related function documentation in PHP is free to download. abstract: curl-related functions in PHP are described in curl-related functions in PHP. in PHP, you can call the following functions to use the powerful functions provided by curl. Curl_init-initialize a curl dialog and return a linked resource handle curl_exec- Explanation of curl-related functions in PHP

Explanation of curl-related functions in PHP


In PHP, you can call the following functions to use the powerful functions provided by curl.

Curl_init-initializes a curl dialog and returns a linked resource handle.

Curl_exec-run a curl dialog. if the dialog succeeds, true is returned. otherwise, false is returned. If CURLOPT_RETURNTRANSFER is set, the response content is returned successfully. otherwise, false is returned.

Curl_close-close a dialog and release resources

Curl_getinfo-get a curl connection resource handle message

Curl_copy_handle-copy a curl to connect all content and parameters of the resource
Curl_errno-returns a number containing the current dialog error message.
Curl_error-returns a char string containing the current dialog error message.

Curl_multi_add_handle-add a separate curl handle resource to the curl batch processing dialog box

Curl_multi_init-initialize a curl batch processing handle resource

Curl_multi_exec-parses a curl batch handle

Curl_multi_close-close a batch processing handle resource and release the resource
Curl_multi_getcontent-return the obtained output document stream
Curl_multi_info_read-get the transmission message of the currently resolved curl
Curl_multi_rearouse_handle-remove a handle resource from the curl batch processing handle.
Curl_multi_select-Get all the sockets associated with the cURL extension, which can then be "selected"
Curl_setopt_array-set the dialog parameters for a curl in the form of an array
Curl_setopt-set the dialog parameter for a curl
Curl_version-Get version messages related to curl



Example of related functions:

The curl_init () function initializes a curl dialog. a parameter of the curl_init () parameter is optional, indicating a url address.
The function of the curl_exec () parameter is to run a curl dialog, and a parameter is the handle returned by the curl_init () parameter.
The curl_close () parameter is used to close a curl dialog, and a parameter is the handle returned by the curl_init () parameter.

$ Ch = curl_init ("#");
Curl_exec ($ ch );
Curl_close ($ ch );
?>



The function of the curl_version () parameter is to obtain the version message related to curl. the curl_version () parameter has a parameter and it is unclear what it is.
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Print_r (curl_version ())
?>

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The curl_getinfo () parameter is used to obtain a curl connection resource handle message. the curl_getinfo () parameter has two parameters. The first parameter is the resource handle of curl, the second parameter is the following constants:

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$ Ch = curl_init ("#");
Print_r (curl_getinfo ($ ch ));
? &

Gt;

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Optional constants include:
* CURLINFO_EFFECTIVE_URL: the last valid url address.
* CURLINFO_HTTP_CODE: The last received HTTP source code.
* CURLINFO_FILETIME: the time when the document is obtained remotely. if the document cannot be obtained, "-1" is returned"
* CURLINFO_TOTAL_TIME: the time consumed by the last transmission.
* CURLINFO_NAMELOOKUP_TIME: name resolution consumed