Case Conversion Function in PHP

ByHarish Posted on

Learn about the case conversion function in php. String-related methods are widely used during programming.

In this short tutorial, we show you some predefined string case conversion functions.

These functions are used to convert a string case to another like in uppercase letters, lowercase letter,s etc.

PHP Case Conversion Functions:

  • strtolower() – It converts string case into lowercase letters.
  • strtoupper() – It converts string case into uppercase letters.
  • ucfirst() – It converts the first letter of the string to uppercase letters.
  • ucwords() – It converts the first letter of each word in the string to uppercase letters.

String Case Conversion Function Examples

$string = "learn PHP programming";

echo $uppercase = strtoupper($string);
//Output: LEARN PHP PROGRAMMING

echo $lowercase = strtolower($string);
//Output: learn php programming

echo $uppercaseFirst = ucfirst($string);
//Output: Learn PHP programming

echo $uppercaseWord = ucwords($string);
//Output: Learn PHP Programming

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