Returns whether this parameter can be passed by value

# ReflectionParameter::canBePassedByValue

(PHP 5 >= 5.4.0, PHP 7, PHP 8)

ReflectionParameter::canBePassedByValue — Returns whether this parameter can be passed by value

### Description

public ReflectionParameter::canBePassedByValue(): bool

### Parameters

This function has no parameters.

### Return Values

Returns `true` if the parameter can be passed by value, `false` otherwise. Returns `null` in case of an error.

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