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Functions in php
- 1. Functions Declaring and CallingFunctions Passing Arguments to Functions Returning Values from Functions Understanding Variable Scope
- 2. Declaring and CallingFunctions • Declaring a function • Calling a function • Defining functions before or after calling them
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- 6. Defining functions beforeor after calling them
- 8. Passing Arguments toFunctions • Declaring a function with an argument • Specifying a default value • Defining a two-argument function • Calling a two-argument function • Multiple optional arguments • Changing argument values
- 9. Declaring a functionwith an argument
- 10. Specifying a defaultvalue
- 11. Defining a two-argumentfunction
- 12. Calling a two-argumentfunction
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- 19. Returning Values fromFunctions • Capturing a return value • Returning a value from a function • Using a return value in an if( ) statement • Returning an array from a function • Using an array returned from a function • Multiple return statements in a function • Passing a return value to another function • Using return values with if( ) • Functions that return true or false • Assignment and function call inside a test expression
- 20. Capturing a returnvalue
- 22. Returning a valuefrom a function
- 23. Using a returnvalue in an if( ) statement
- 25. Returning an arrayfrom a function
- 26. Using an arrayreturned from a function
- 28. Multiple return statementsin a function
- 29. Passing a returnvalue to another function
- 32. Using return valueswith if( )
- 34. Functions that returntrue or false
- 37. Assignment and functioncall inside a test expression
- 40. Understanding Variable Scope •Variable scope • The $GLOBALS array • Modifying a variable with $GLOBALS • The global keyword
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- 45. Modifying a variablewith $GLOBALS
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