Description:
------------
OCI8 calls zend_hash_find() to look up existing connection in the hash table. However, with new string compare function zend_string_equal_content(), it failed to match a hash key:

static zend_always_inline Bucket *zend_hash_find_bucket(const HashTable *ht, zend_string *key, zend_bool known_hash)
{
	...
	while (EXPECTED(idx != HT_INVALID_IDX)) {
		p = HT_HASH_TO_BUCKET_EX(arData, idx);
		if (EXPECTED(p->key == key)) { /* check for the same interned string */
			return p;
		} else if (EXPECTED(p->h == h) &&
		     EXPECTED(p->key) &&
		     EXPECTED(zend_string_equal_content(p->key, key))) {
			return p;
		}
        ...
}

Revert zend_string_equal_content() to memcmp() resolved the issue.

Test script:
---------------
Reproducible testcase: ext/oci8/tests/drcp_connection1.phpt