Basic items, user functions, functions, return, global, static

In terms of structure, there are strict differences between uppercase letters of C, C ++, JAVA, and Perl and lowercase letters. For example, $ I and $ I are two different variables. Basic items

In terms of structure, there are strict differences between uppercase letters of C, C ++, JAVA, and Perl and lowercase letters.

For example, $ I and $ I are two different variables.

Therefore, properly describe the upper and lower case letters of the function.

The delimiters and Perl are somewhat different in structure.

<And <are required.

Print <END_OF_HTML does not end 「;」.

Do not end with ";" at the end of END_OF_HTML 「;」.

print <<< END_OF_HTML
abcde
fghijkl
END_OF_HTML;

It is possible to place the number of delimiters into the variable.

$msg = <<< END_OF_HTML
abcde
fghijkl
END_OF_HTML;

Parameters are the same as those in C.
The address can also be transferred.

User functions

Function UserFunction ($ para1, $ para2,...) {global $ a; static $ B; $ c = 1; encoding... return returncode ;}

** Return values can be sent in return.

** The address sent to the parameter is UserFunction (& $ para1 ).

** Function UserFunction (& $ para1, & $ para2 ,...) The specified address can also be sent to functions.

Sample code verification

 Variable \ $ a = $
\ N "; print"
Variable \ $ B = $ B
\ N "; print"
Variable \ $ c = $ c
\ N "; print"
Variable \ $ d = $ d
\ N "; print"
Variable \ $ e = $ e
\ N "; /* ===================================================== ======================================== test function ========================================================== ====================== */function test ($ p) {global $ a; static $ B; $ c = 1; $ a + = 10; $ B + = 20; $ c + = 30; $ p + = 40; return (50) ;}?>

[Execution result]

Variable $ a = 110

Variable $ B = 200

Variable $ c = 300

Variable $ d = 400

Variable $ e = 50

** $ A, use the function test (), global $ a;, and declare it as 110.

** $ B, $ c, $ d, and functions become other things in test () without being affected.

The local variables and scope of common concepts of global functions are the same as those of VB.

You can refer to "VB basics (part 5) function construction (sub, function )』.