What Does It Mean to Run PHP in Quiet Mode

What does it mean to run PHP in quiet mode?

This only concerns the PHP interpreter built against the CGI SAPI. This version sends a few basic HTTP headers before any actual output:

X-Powered-By: PHP/5.3.3-1ubuntu9.3
Content-type: text/html

"(echo) What I actually wanted to have"

So basically the -q commandline flag prevents any header() from being written to stdout.

The purpose is to use the php-cgi binary in lieu of the php CLI variant for console scripts. Usually you see following shebang in such scripts to force php-cgi to behave like the -cli version:

#!/usr/bin/php-cgi -qC

How to run PHP built-in server in quiet mode?

Try this:

php -q -S 127.0.0.1:80 -t public/

use -q option for Quiet-mode

Run PHP-CLI Without Quiet Mode

Use php-cgi instead of php:

$ php-cgi /var/www/phptest.php

Status: 302 Moved Temporarily
X-Powered-By: PHP/5.6.32
Location: http://www.something.com
Content-type: text/html; charset=UTF-8

What is the meaning of -q in the following scripts? What differences will it make running without it?

Taken from the man php command:

-q  Quiet-mode. Suppress HTTP header output (CGI only).

See also What does it mean to run PHP in quiet mode?

How to run an external PHP script silently within a PHP script?

You can use file_get_contents()

file_get_contents("server-b.com/test.php");

or Curl

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, "server-b.com/test.php"); 
curl_setopt($ch, CURLOPT_HEADER, TRUE); 
curl_setopt($ch, CURLOPT_NOBODY, TRUE); // remove body 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); 
curl_exec($ch); 

What does the -q PHP command-line option do?

The -q flag suppresses HTTP header output. As long as your script itself does not send anything to stdout, -q will prevent cron from sending you an email every time the script runs. For example, print and echo send to stdout. Avoid using these functions if you want to prevent cron from sending you email.

Php daemon -q switch

See command line options

-q | --no-header | Quiet-mode. Suppress HTTP header output (CGI only).

Laravel artisan tinker - quiet mode - don't print query results

Tinker dumps the output of the last command executed. So a hackish trick to suppress any output is to append a null statement:

>>> $threads = App\Thread::all(); '';

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