Re: how to lock a block of php codes


Hi Kelvin,

I generally use a text file as a lock so:

$fp = @fopen("lock.txt", "w+"); //open lock file
if ($fp && (flock($fp, LOCK_EX))) {//place an exclusive lock on the file
//do stuff
@fclose($fp); //release Lock

cheers
ED

In all honesty in this instance it maybe better to keep a log of the
transaction id's (paypal creates a unique transaction ID for each 1). Simply
store this id in a database of some kind and if it already exists do not
process it again.


.

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