Whenever a resource conflict would be caused by fulfilling the request. Duplicate entries and deleting root objects when cascade-delete is not supported are a couple of examples. Slein, J. Reliable, interoperable negotiation of Upgrade features requires an unambiguous failure signal. The Upgrade Required status code allows a server to definitively state the precise protocol extensions a given resource must be served with. Its typical use is to avoid the "lost update" problem, where a client GETs a resource's state, modifies it, and PUTs it back to the server, when meanwhile a third party has modified the state on the server, leading to a conflict. By requiring requests to be conditional, the server can assure that clients are working with the correct copies. The status code is optional; clients cannot rely upon its use to prevent "lost update" conflicts. The origin server requires the request to be conditional.
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Submit a Pull Request Report a Bug. I think the way an array of attachments works is kind of cumbersome. Usually the PHP guys are right on the money, but this is just counter-intuitive. Do not use Coreywelch or Daevid's way, because their methods can handle only within two-dimensional structure. Given the right settings and permissions php-cgi is capable of replacing even php files. Imagine if it replaced the upload post processor file itself. The next "upload" could lead to some easy exploits.
I'm not going to break up with her because of her religion, but if we can't come to some kind of understanding about what we'd do with kids After reading every page of that CES letter I am fully aware this religion is a complete fabrication. But, as soon as the marriage happened, the Mormon spouse goes full on Orthodox and expects the non Mormon to comply. Racial differences can be very trivialвthey really didn't come up much for my parents, for exampleвand are basically false differences. Unfortunately, this has led to a culture of Mormon girls who are absolutely obsessed with Disney and even as adults dream of being Disney princesses. That said, Mormons have learned to have fun without alcohol and often have to wait until drinkers are well-oiled and loosened up to join in the dopey-ness.