PHP curl_exec function gets the output information of CURL request

We learned before that the php curl_exec function is one of the PHP cURL function lists. Its function is to execute a cURL session. After executing a cURL session, we want to obtain relevant information about the executed CURL. We want to output the information, but how to do it? This article will take you through how to request information related to CURL request output.

After the curl_exec() function is executed, you can use the curl_getinfo() function to obtain the relevant information output by the CURL request

curl_getinfo is to obtain the information of a cURL connection resource handle

He The syntax

mixed curl_getinfo ( resource $ch [, int $opt = 0 ] )

obtains the relevant information of the last transmission.

Parameters

ch

The cURL handle returned by curl_init().

opt

This parameter may be one of the following constants:

CURLINFO_EFFECTIVE_URL - The last valid URL address

CURLINFO_HTTP_CODE - The 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 consumed by the last transmission

CURLINFO_NAMELOOKUP_TIME - The time consumed by name resolution

CURLINFO_CONNECT_TIME - The time taken to establish the connection

CURLINFO_PRETRANSFER_TIME - The time taken from establishing the connection to preparing for transmission

CURLINFO_STARTTRANSFER_TIME - From establishing the connection to Time taken to start the transfer

CURLINFO_REDIRECT_TIME - Time taken to redirect before the transaction starts.

CURLINFO_SIZE_UPLOAD - Total amount of data uploaded

CURLINFO_SIZE_DOWNLOAD - Amount of downloaded data The total value of

CURLINFO_SPEED_DOWNLOAD - the average download speed

CURLINFO_SPEED_UPLOAD - the average upload speed

CURLINFO_HEADER_SIZE - the size of the header part

CURLINFO_HEADER_OUT - the string to send the request

CURLINFO_REQUEST_SIZE - The size of the request in question in the HTTP request

CURLINFO_SSL_VERIFYRESULT - The result of the SSL certificate verification request returned by setting CURLOPT_SSL_VERIFYPEER

CURLINFO_CONTENT_LENGTH_DOWNLOAD - From Content-Length: The download content length read in the field

CURLINFO_CONTENT_LENGTH_UPLOAD - Description of the upload content size

CURLINFO_CONTENT_TYPE - Content-Type: value of the downloaded content, NULL means that the server did not send a valid Content-Type: header

Return value

If opt is set, return its value as a string. Otherwise, return an associative array containing the following elements (they correspond to opt respectively)For example, if $opt is set to CURLINFO_TOTAL_TIME, the curl_getinfo() function only returns total_time, which is the total transmission time. You only need to pay attention to some When transmitting information, it makes sense to set the $opt parameter.

"url"

"content_type"

"http_code"

"header_size"

"request_size"

"filetime"

"ssl_verify_result"

"redirect_count"

"total_time"

"namelookup_time"

" connect_time"

"pretransfer_time"

"size_upload"

"size_download"

"speed_download"

"speed_upload"

"download_content_length"

"upload_content_length"

"starttransfer_time"

"redirect_time"

Example

Code running results:

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