$iPkt = “1“;

for ( $i = 1; $i < $pktSize; $i++ )
{
    $iPkt += "1";
}

[download]
You're using numerical addition rather than string concatenation. try the following instead: 
    $iPkt .= "1";

[download]
or even better, replace the whole loop with 
$iPkt = “1“ x $pktSize;

[download]
Finally, if you want to send data more complex than just a stream of ASCII "1"s, especially binary data, then you may want to check out the pack() function.

Dave.

In reply to Re: How do I create a variable length byte array for socket transmission? by dave_the_m
in thread How do I create a variable length byte array for socket transmission? by rambo2_981

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