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The function scope chain is determined by the function definition rather than the call.

Source: Internet
Author: User
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Not much nonsense. Go to the Code:

Case 1

<!doctype html>

The output result is as follows:




The expected value is true, but the result is tragic.


Case 2


<!doctype html>

The output result is as follows:




Changes:


Put the definition of function B into the internal definition of function A, and the output result is as expected.


Summary:


The function scope is determined by the function definition.

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Related Keywords:
get the permalink function call by reference php call function by name function scope php function scope call function c function scope

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