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Subject: Re: [PHP-DEV] Seg fault when using active_symbol_table called from
 userspace function.
From: markskilbeck@gmail.com (Mark Skilbeck)

Scott MacVicar wrote:
> On 1 Nov 2009, at 21:09, Mark Skilbeck <markskilbeck@gmail.com> wrote:
> 
>> [snip]
> 
> There is no symbol table as there are no variables. You should check if 
> it's NULL before using zend_hash_exists.
> 
> Scott

Hi, Scott. I'm having trouble - I added the check to see if the symbol 
table i available, yet it returns false even if I have added variables 
within the function:

[code]
PHP_FUNCTION(sample_var_a_exists)
{
	if (!EG(active_symbol_table) ||
			!zend_hash_exists(EG(active_symbol_table), "a", sizeof("a"))) {
		RETURN_BOOL(0);
	}
	RETURN_BOOL(1);
}
[/code]

[code]
$a = '';
var_dump(sample_var_a_exists());

function x() {
	$a = ''; // Add a symbol to the hash table.
	var_dump(sample_var_a_exists()); // Shows bool(false)
}

x();
[/code]