RemoveCallback
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## RemoveCallback

RemoveCallback — Unregisters any callback registered for the given reason

## Synopsis

    $plot->RemoveCallback($reason)

## Description

`RemoveCallback` unregisters any callback registered for the given reason. It undoes the effect of SetCallback.

## Parameters

`$reason`

  A PHPlot-defined name for the callback. See Section 6.3, “Available Callbacks”.

## Return Value

Returns True if the given reason is valid (whether or not there was actually a callback registered for it). Returns False if reason is not a valid callback reason.

## Notes

Callbacks are an experimental feature added to PHPlot-5.0.4. Refer to Chapter 6, Callbacks for more information.

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