- var_dump: documentation ( source)
- get_defined_vars: documentation ( source)
- debug_zval_dump: documentation ( source)
<?php
$a = 'foo';
$b = & $a;
$c = 'moo';
$vars = get_defined_vars();
$vars['a'] = 'OMG';
$vars['c'] = 'Pie';
debug_zval_dump($a); debug_zval_dump($b); debug_zval_dump($c);
var_dump($a, $b, $c);