为什么我不能在我的PHP代码中执行此终端命令？

Question

i want to test via ApacheBenchmark a website, and,after the execution, people.txt contains just sh: 1: ab: not found

i tried full path of ApacheBenchmark

<?php
$output = shell_exec('ab -k -c 350 -n 20000 www.yahoo.com 2>&1');
$file = 'people.txt'; 
file_put_contents($file, $output);
?>

Answer 1

You don't have "ab" tool installed on your system. If you're on Debian based OS (eg Ubuntu), use apt-get install apache2-utils to install it. For RedHat systems, try yum install httpd-tools