Potential fix for code scanning alert no. 16: Use of expired stack-address

[paliwangtel]

Potential fix for https://github.com/octodevark/php-src/security/code-scanning/16

To fix the issue, we need to ensure that any stack variables used within the zend_try construct are not accessed after their scope ends. This can be achieved by allocating memory for such variables on the heap instead of the stack, ensuring their lifetime extends beyond the function scope if necessary. Additionally, proper cleanup should be implemented to avoid memory leaks.

The specific changes required are:

1. Replace the use of stack-allocated variables with heap-allocated memory where necessary.
2. Ensure that the memory allocated on the heap is properly freed after use.
3. Modify the zend_try construct to avoid accessing expired stack variables.

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