Example that shows the effect of scream
Introduction
Affecting PHP's Behaviour
PHP Manual

# uopz

- Introduction
- Installing/Configuring
  - Requirements
  - Installation
  - Runtime Configuration
  - Resource Types
- Predefined Constants
- Uopz Functions
  - uopz_backup — Backup a function
  - uopz_compose — Compose a class
  - uopz_copy — Copy a function
  - uopz_delete — Delete a function
  - uopz_extend — Extend a class at runtime
  - uopz_flags — Get or set flags on function or class
  - uopz_function — Creates a function at runtime
  - uopz_implement — Implements an interface at runtime
  - uopz_overload — Overload a VM opcode
  - uopz_redefine — Redefine a constant
  - uopz_rename — Rename a function at runtime
  - uopz_restore — Restore a previously backed up function
  - uopz_undefine — Undefine a constant

Example that shows the effect of scream
Introduction
Affecting PHP's Behaviour
PHP Manual