How do I echo text in capital letters?

问题

I want to know how to capitalize in PHP

回答1:

echo strtoupper('hello');

strtoupper will capitalize the whole string.

If you're only interested in capitalizing the first letter, you can use ucfirst:

echo ucfirst('hello!'); //Hello!

If you want to capitalize the first letter of each word in a string, use ucwords:

echo ucwords('hello world!'); //Hello World!

回答2:

The strtoupper() function is what you're looking for.

来源：https://stackoverflow.com/questions/1054631/how-do-i-echo-text-in-capital-letters