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@ 2016-08-09T11:26:24Z

<?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
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

117.86 ms | 404 KiB | 5 Q