How do I make a loop for my simple PHP coding?

[project168]

How would I add a loop to this PHP coding? I want to make it so that after 'I AM THOMAS' it will loopback to 'HELLO WORLD' and repeat the same cycle infinitely.

 

How do I make a loop for PHP? Is this right?

 

<?PHP

require ("config.php");

exec("mode com3: BAUD=9600 PARITY=n DATA=8 STOP=1 to=off dtr=off rts=off");

$fp =fopen("com3", "w");

while (true){

fwrite($fp,"HELLO WORLD");

fwrite($fp,"I AM THOMAS");

sleep(5);

}

fclose($fp);

?>

 

[RussellReal]

How would I add a loop to this PHP coding? I want to make it so that after 'I AM THOMAS' it will loopback to 'HELLO WORLD' and repeat the same cycle infinitely.

 

How do I make a loop for PHP? Is this right?

 

<?PHP

require ("config.php");

exec("mode com3: BAUD=9600 PARITY=n DATA=8 STOP=1 to=off dtr=off rts=off");

$fp =fopen("com3", "w");

while (true){

fwrite($fp,"HELLO WORLD");

fwrite($fp,"I AM THOMAS");

sleep(5);

}

fclose($fp);

?>

 

 

$x = true;
while (true){
if ($x) fwrite($fp,"I AM THOMAS");
else fwrite($fp,"HELLO WORLD");
$x = !$x;
sleep(5);
}

[kenrbnsn]

No, that loop will write out "I AM THOMAS" & "HELLO WORLD" alternating. Use this instead

<?php
require ("config.php");
exec("mode com3: BAUD=9600 PARITY=n DATA=8 STOP=1 to=off dtr=off rts=off");
$fp =fopen("com3", "w");
fwrite($fp,"I AM THOMAS");
while (true) {
   fwrite($fp,"HELLO WORLD");
}
fclose($fp); // this line will never be executed
?>

 

This code will stop after 30 seconds, since that is the default maximum time a PHP script can run.

 

Ken

[project168]

No, that loop will write out "I AM THOMAS" & "HELLO WORLD" alternating. Use this instead

<?php
require ("config.php");
exec("mode com3: BAUD=9600 PARITY=n DATA=8 STOP=1 to=off dtr=off rts=off");
$fp =fopen("com3", "w");
fwrite($fp,"I AM THOMAS");
while (true) {
   fwrite($fp,"HELLO WORLD");
}
fclose($fp); // this line will never be executed
?>

 

This code will stop after 30 seconds, since that is the default maximum time a PHP script can run.

 

Ken

 

hey Ken, that explains why my code stops after 30 seconds. Is there anyways to maximize the default time of PHP script which it can run up to maybe 5 mins?

 

Or atleast an alternative way to repeat the cycle of my fwrite? Is there some ways to be implement this without going to the max of 30s? Thanks

[kenrbnsn]

What are you trying to do, exactly?

 

To change the maximum execution time, use the function set_time_limit()

 

Ken