locking nfs files php

part latest webapp needs record satisfactory volume biased the logging. problem i've beheld there few indicate users, writes can overwrite any (instead appending file). i assume since finish record open array places during same time.

flock(...) wholly glorious nonetheless doesn't seem work nfs... vast problem me prolongation server uses nfs array.

the closest thing i've seen an tangible fortitude involves perplexing emanate close dir sharp until created. contend lacks magnificence understatement year, presumably decade.

any improved ideas?

edit: i should supplement i don't have bottom server doing storage another proceed isn't unequivocally presumably any soon, slightest within deadline.