Question

请允许我了解一下两者之间的基本差别。

$GLOBALS["test"] and global $test

并且,如果使用$GLOBALS[”test]_SESSION [ test ]/code?

Answer 1



  and, will it make sense that, if i use
  $GLOBALS["test"] instead of
  $_SESSION[ test ]?


http://www.php.net/manual/en/intro.session.php“rel=“nofollow noreferer”>session与全球现有的变量不同。

<GLOBALS


  An associative array containing
  references to all variables which are
  currently defined in the global scope
  of the script. The variable names are
  the keys of the array.


 http://php.net/manual/en/servd.variables.globals.php

<>Explanation:

<代码>GLOBALS是你整个发言稿中可使用的联系阵容,无需使用<代码>全球测试<<>。

Note: This is a superglobal , or automatic global, variable. This simply means that it is available in all scopes throughout a script. There is no need to do global $variable; to access it within functions or methods.

Answer 2

<代码>GLOBALS[”test]和global$test之间没有任何区别。两者都是纯粹的邪恶,都是 used。

Why are they evil?

Suddenly your code becomes depended on some outer environment, its portability falls head over heels. It requires some variable defined somewhere, nobody know where, with some value, nobody know what s the proper value.
Imagine that $test is supposed to store an information about something, let s say: number of balls. Everything is fine until there is such a variable and it store what it s suppose to store. However what happen if you decide to delete that variable or use it for other purpose? Bah, fatal errors pop out of nowhere! You don t know what s going on, everything worked fine, you just change a variable s value and everything is falling apart.

Why are they evil?

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