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<?php function ref( &$ref ) { var_dump( $ref ); } $func = 'ref'; $foo = 'native'; ref( $foo ); $foo = 'variable'; $func( $foo ); $foo = 'call_user_func_array'; call_user_func_array( $func, array( &$foo ) ); $foo = 'call_user_func'; call_user_func( $func, $foo );
Output for git.master, git.master_jit, rfc.property-hooks
string(6) "native" string(8) "variable" string(20) "call_user_func_array" Warning: ref(): Argument #1 ($ref) must be passed by reference, value given in /in/fESuN on line 16 string(14) "call_user_func"

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