'$ ch'和'-F'在$ ch中代表什么= curl_init（）;

Question

I'm using cURL in php. Noticed each time a curl case is initiated, people always put：

$ch=curl_init(); 

WHat does '$ch' mean?

curl -F template_invoke_name='sendcloud_template' 

What does '-F' mean?

I've googled around with no answers so hoping to get some here. Thanks!

Answer 1

When you call curl_init() it initializes a new session and returns a cURL handle. $ch is a variable to store the handle (I'm guessing in this instance that $ch is a shortened version of curl handle ). Functions such as curl_setopt require a curl handle to be passed in as an argument.

Reference: http://se2.php.net/manual/en/function.curl-init.php

Answer 2

$ch is just some variable that holds the cURL handle returned by curl_init() , and -F refers to form content see, -F, --form . This lets curl emulate a filled-in form in which a user has pressed the submit button. This causes curl to POST data using the Content-Type multipart/form-data