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PHP case sensitivity issue
- 巴扎黑Original
- 2016-11-11 11:56:021346browse
1. Case sensitive
1. Variable names are case sensitive
All variables are case sensitive, including ordinary variables and $_GET,$_POST,$_REQUEST,$_COOKIE,$_SESSION,$GLOBALS,$_SERVER,$_FILES, $_ENV, etc.;
2. Magic constants are not case-sensitive, uppercase is recommended
including: __LINE__, __FILE__, __DIR__, __FUNCTION__, __CLASS__, __METHOD__, __NAMESPACE__.
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