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PHP English letter case conversion function

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WBOYOriginal
2016-07-25 09:13:101008browse

Example 1, convert the first letter of each word to uppercase: ucwords()

  1. $foo = 'hello world!';
  2. $foo = ucwords($foo); // Hello World!
  3. $bar = 'HELLO WORLD!';
  4. $bar = ucwords ($bar); // HELLO WORLD!
  5. $bar = ucwords(strtolower($bar)); // Hello World!
  6. ?>
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Example 2, the first letter of the first word changes Uppercase: ucfirst()

  1. $foo = 'hello world!';
  2. $foo = ucfirst($foo); // Hello world!
  3. $bar = 'HELLO WORLD!';
  4. $bar = ucfirst ($bar); // HELLO WORLD!
  5. $bar = ucfirst(strtolower($bar)); // Hello world!
  6. ?>
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Example 3, the first letter of the first word changes Lowercase: lcfirst()

  1. $foo = 'HelloWorld';
  2. $foo = lcfirst($foo); // helloWorld
  3. $bar = 'HELLO WORLD!';
  4. $bar = lcfirst($bar) ; // hELLO WORLD!
  5. $bar = lcfirst(strtoupper($bar)); // hELLO WORLD!
  6. ?>
  7. Change all letters to uppercase: strtoupper()
  8. Change all letters to lowercase: strtolower()
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The above introduces a total of five English letter case conversion functions, namely ucwords, ucfirst, lcfirst, strtoupper, and strtolower, each with its own use.



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