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Herouth Maoz #1
Is fwrite atomic or not?
I've seen answers both ways in the archive of this list, and I wonder
what is true.
Suppose I open a file in append mode - like a log file. Two different
HTTP connections fire up two different PHP processes which both open
the same file. Then they both do an fwrite( $fp, "some string" ).
Is the result serializable? That is, is one write guaranteed to be
appended after the the other? Or is there a chance that one will
overwrite the other and truncate the file - in which case, I'll need
an flock() even for the simplest log file.
What if I opened the file in some other mode, like "w" or "r+"?
Herouth
(If you answer, please make sure you cc to my e-mail, as I read this
list in digest mode).
Herouth Maoz Guest
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