Description:
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From manual page: http://www.php.net/function.socket-set-nonblock%23Description
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<quote>When an operation (e.g. receive, send, connect, accept, ...) is performed on a non-blocking socket, the script not pause its execution until it receives a signal or it can perform the operation. Rather, if the operation would result in a block, the called function will fail. </quote>

The sentence isn't clear and requires some revised grammar.

Expected result:
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When an operation (e.g. receive, send, connect, accept, ...) is performed on a non-blocking socket, the script will not pause its execution until it receives a signal or it can perform the operation. If the operation results in a blocked socket the function will fail.