Question

I am running into a project that read a stream from a txt file, so in the CLI, i write:

cat texte.txt|php index.php

In my index.php file i read the stream:

$handle = fopen ("php://stdin","r");

Now i have a $result that contains the result of my processing file and i want to output it with STDOUT, I looked in the manual, but I don’t know how to use it, can you please make me a use example.

Answer 1

Okay, let me give you another example for the STDIN and STDOUT usage.

In PHP you use these two idioms:

 $input = fgets(STDIN);

 fwrite(STDOUT, $output);

When from the commandline you utilize them as such:

 cat "input.txt"  |  php script.php   >  "output.txt"

 php script.php  < input.txt  > output.txt

 echo "input..."  |  php script.php   |  sort  |  tee  output.txt

That’s all these things do. Piping in, or piping out. And the incoming parts will appear in STDIN, whereas your output should go to STDOUT. Never cross the streams, folks!