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<?php namespace Bar { const BAR_E_ERROR = 42; function foo($value = E_ERROR) {} function bar($value = \E_ERROR) {} function baz($value = BAR_E_ERROR) {} } namespace { function foo($value = E_ERROR) {} $list = array('foo', 'Bar\foo', 'Bar\bar', 'Bar\baz'); foreach ($list as $functionName) { $ref = (new ReflectionParameter($functionName, 'value')); var_dump($functionName, $ref->getDefaultValueConstantName(), $ref->getDefaulValue()); } }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined method ReflectionParameter::getDefaulValue() in /in/9EqVs:17 Stack trace: #0 {main} thrown in /in/9EqVs on line 17
Process exited with code 255.

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