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This article mainly introduces the method of converting all strings to uppercase or lowercase in php, involving strtolower in php For tips on using functions such as strtoupper, friends in need can refer to it
The example in this article describes how PHP converts all strings into uppercase or lowercase. Share it with everyone for your reference. The specific analysis is as follows:
In PHP, you can use the strtolower and strtoupper functions to convert all English characters in the string to lowercase or uppercase
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$string = "Learn PHP string functions at jb51.net";
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1 2 | learn php string functions at jb51.net LEARN PHP STRING FUNCTIONS AT JB51.NET |