(PHP 5 >= 5.0.3, PHP 7, PHP 8)
ReflectionParameter::isDefaultValueAvailable — Checks if a default value is available
public ReflectionParameter::isDefaultValueAvailable(): bool
Checks if a default value for the parameter is available.
This function has no parameters.
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https://www.php.net/manual/en/reflectionparameter.isdefaultvalueavailable.php