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php method to convert English lowercase to uppercase: first create a new "test.php" file; then create the code "$str = strtoupper($str)" in the file; finally run " localhost/test.php".
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##php Method to convert English primary school to uppercase:
The function of php to convert lowercase to uppercase is: strtoupper()First create a new test.php file and add the following content:<?php $str = "www.php.cn"; $str = strtoupper($str); echo $str; ?>Then run the file in the browser
Function introduction:
Related functions:Syntax:lcfirst() - Convert the first character in the string to lowercase
strtolower() - Convert the string to lowercase
ucfirst() - Convert the string to lowercase Convert the first character in the string to uppercase
ucwords() - Convert the first character of each word in the string to uppercase
strtoupper(string)Parameters
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