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<?php namespace Foo\Space { class Foo { const SOME_CONSTANT = 'Works!'; } } namespace Other\Space { $class = \Foo\Space\Foo::class; $constant = 'SOME_CONSTANT'; var_dump(constant("{$class}::{$constant}")); }
Output for 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(6) "Works!"
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/TEMlq on line 13
Process exited with code 255.
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184.51 ms | 401 KiB | 230 Q