Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I save data which come from a form to a file. There is a row number in file. If two or more users submit the form at same time, we expect the row numbers are same. Because before the saving, I read the highest row number for decide new record row number.
How can I prevent that?
sys_getloadavg is solution?
Thanks.
You can do this with a file lock (slow but works on all platforms) or a semaphore. see this thread for details:
PHP mutual exclusion (mutex)