What is the max key size for an array in PHP?

Question

I am generating associative arrays and the key value is a string concat of 1..n columns.

Is there a max length for keys that will come back to bite me? If so, I\'ll

Answer 1

It seems to be limited only by the script's memory limit.

A quick test got me a key of 128mb no problem:

ini_set('memory_limit', '1024M');

$key = str_repeat('x', 1024 * 1024 * 128);

$foo = array($key => $key);

echo strlen(key($foo)) . "
";
echo strlen($foo[$key]) . "
";