PHP repeating output of system()

Posted: Thu Mar 04, 2004 2:36 pm (20 years, 1 month ago)

I've just noticed something odd. I have the following script to provide some stats about my pc:

Code:

<?php
print 'Uptime: ';
print system('uptime').'';
print 'Logged in Users:<blockquote><pre>';
print system('who').'</pre></blockquote>';
print 'Services:<blockquote><pre>';
print system('rc-status').'</pre></blockquote>';
print 'Disk Usage:<blockquote><pre>';
print system('df -h').'</pre></blockquote>';
?>

for some reason, it prints the last line output by system() twice, as below:

Quote:

Uptime: 14:27:44 up 4:48, 2 users, load average: 1.28, 1.92, 2.51 14:27:44 up 4:48, 2 users, load average: 1.28, 1.92, 2.51

Logged in Users:

adam :0 Mar 4 11:21
adam pts/1 Mar 4 13:06 (:0.0)
adam pts/1 Mar 4 13:06 (:0.0)

Services:

Runlevel: default
xdm [ started ]
sshd [ started ]
local [ started ]
mysql [ started ]
vixie-cron [ started ]
domainname [ started ]
esound [ started ]
net.wlan0 [ started ]
sysklogd [ started ]
netmount [ started ]
usermin [ started ]
webmin [ started ]
apache2 [ started ]
hotplug [ started ]
setiathome [ started ]
mldonkey [ started ]
pure-ftpd [ started ]
pure-ftpd [ started ]

Disk Usage:

Filesystem Size Used Avail Use% Mounted on
/dev/hdb3 8.6G 5.7G 2.9G 67% /
/dev/hda1 17G 4.6G 12G 29% /home
none 189M 0 189M 0% /dev/shm
none 189M 0 189M 0% /dev/shm

I'm pretty sure this must be a bug in php, does anyone know anything about it?

(using apache 2.0.48 and php 4.3.4)

Posted: Thu Mar 04, 2004 2:39 pm (20 years, 1 month ago)

ok, I've figured it out already Laughing

things printed to stdout by system() are sent to the browser straight away, as well as being returned by the function. *sigh*