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<?php namespace foo; class MyException extends \Exception {} $class = '\\foo\\MyException'; echo "$class\n", '1) ', var_export(is_subclass_of($class, "\\Exception"), true), "\n", '2) ', var_export(is_subclass_of("\\foo\\MyException", "\\Exception"), true), "\n", '3) ', var_export(assert('is_subclass_of($class, "\\Exception")'), true), "\n", '4) ', var_export(assert('is_subclass_of("\\foo\\MyException", "\\Exception")'), true), "\n";
Output for git.master, git.master_jit, rfc.property-hooks
\foo\MyException 1) true 2) true 3) true 4) true

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