PHP funkce ob_start()
Dostupnost ve verzích:
Turn on output buffering
|Parametr||Datový typ||Výchozí hodnota||Poznámka|
| || ||null,||An optional output_callback function may be specified. This function takes a string as a parameter and should return a string. The function will be called when the output buffer is flushed (sent) or cleaned (with ob_flush, ob_clean or similar function) or when the output buffer is flushed to the browser at the end of the request. When output_callback is called, it will receive the contents of the output buffer as its parameter and is expected to return a new output buffer as a result, which will be sent to the browser. If the output_callback is not a callable function, this function will return false.|
| || ||null,||If the optional parameter chunk_size is passed, the buffer will be flushed after any output call which causes the buffer's length to equal or exceed chunk_size. Default value 0 means that the function is called only in the end, other special value 1 sets chunk_size to 4096.|
| || ||null||If the optional parameter erase is set to false, the buffer will not be deleted until the script finishes. This causes that flushing and cleaning functions would issue a notice and return false if called.|
true on success or false on failure.