Output of shell_exec gets truncated to 100 characters

问题

When run in shell the following command,

curl -F file=@filename http://192.168.0.1

produces the following output:

Accuracy = 0% (0/1) (classification)
Accuracy = 0% (0/1) (classification)
Accuracy = 0% (0/1) (classification)
Accuracy = 0% (0/1) (classification)
verdict = success!

When I run it in php, either by using shell_exec(), exec() or the backtick operator,

$verdict = `curl -F file=@$filename $url`;

I get the following output:

Accuracy = 0% (0/1) (classification)
Accuracy = 0% (0/1) (classification)
Accuracy = 0% (0/1) (class

The output gets truncated at exactly 100 characters. I cannot for the life of me figure out why this is. Why is this, and how do I get the full output in a php variable?

回答1:

You may avoid executing the cURL operation via terminal because

It is very likely that not every server will support executing the commands via code.
It is very likely that the safe-mode is enabled in production.
Not every user that executes the above command in terminal will have permission to execute.
Not every user that executes the above command without specifying the full path of the command (like /usr/bin/curl)

Consider using PHP's built-in cURL option to implement this via