Hi all,
Please take a look at following very simple script;
#!/usr/bin/php -q
<?
echo "Hello, world!\n";
if (!$tty) {
$tty = fopen('php://stdin', 'r');
}
print "Hello: ";
$ch = fgets($tty, 1024);
print "$ch\n";
?>
I tested it on many servers. Here is how it running (you can
figure out yourself): Firstly it displays "Hello, world!", then
displays "Hello: " at second line and waits for user input;
You input a "yes" and it displays the "yes"; then end. So, on
the screen you will see:
Hello, world!
Hello: yes
yes
However, on one of the servers, it doesn't run like above,
but in a reversed way: Firstly, it displays nothing but waits
for your input; you input a "yes", then it displays the "yes",
then "Hello, world!", then "Hello: yes". So, on the screen it
looks like this:
yes
Hello, world!
Hello: yes
Weird? To me IT IS! I really don't understand why all the
echos/prints did not function until the script got data from
tty, even they are before fgets..
I found this issue during an unsuccessfull pear installation.
The pear installer stopped and waited for my input without
any prompt - there is prompt message but not displayed!
Can anyone let me know how this can happen? Thanks
in advance!
Alex
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