Re: Seg fault when using active_symbol_table called from userspace function.

Scott MacVicar wrote:

On 1 Nov 2009, at 21:41, Mark Skilbeck wrote:

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] --

You probably want the following to build the symbol table.

    if (!EG(active_symbol_table)) {
        zend_rebuild_symbol_table(TSRMLS_C);
    }

Scott

Yes, that works. Do you know why we have to rebuild it? I'd assume that the symbol table was built automatically?