September 2001
Intermediate to advanced
768 pages
32h 45m
English
Content preview from PHP Functions Essential Reference
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Chapter 14. Function-Handling Functions
The function-handling functions provide developers with tools to call, define, and test functions. The function-handling functions are a core part of PHP. They allow the programmer to easily do the following tasks:
Dynamically call and build functions at runtime
Create functions that accept variable-length argument lists
Call functions arbitrarily at the end of a script
Ensure that a function is defined in the current scope
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