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# fflush

(PHP 4 >= 4.0.1, PHP 5)

fflush -- Flushes the output to a file

## Description

bool fflush ( resource handle)

This function forces a write of all buffered output to the resource pointed to by the file handle handle. 成功回傳`TRUE`失敗回傳`FALSE`。

The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen().

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