PHP Case Converter

Simple PHP function that takes a string and converts it to another naming convention.

The code

/**
 * Converts a string to different naming conventions.
 *
 * @since  1.0.0
 *
 * @author Lee Anthony https://seothemes.com
 *
 * @param string $string String to convert.
 * @param string $case   Naming convention.
 *
 * @return string
 */
function convert_case( $string, $case = 'snake' ) {
	$delimiters = 'sentence' === $case ? [ ' ', '-', '_' ] : [ ' ', '-', '_', '.' ];
	$lower      = trim( str_replace( $delimiters, $delimiters[0], strtolower( $string ) ), $delimiters[0] );
	$upper      = trim( ucwords( $lower ), $delimiters[0] );
	$pieces     = explode( $delimiters[0], $lower );

	$cases = [
		'camel'    => lcfirst( str_replace( ' ', '', $upper ) ),
		'pascal'   => str_replace( ' ', '', $upper ),
		'snake'    => strtolower( implode( '_', $pieces ) ),
		'ada'      => str_replace( ' ', '_', $upper ),
		'macro'    => strtoupper( implode( '_', $pieces ) ),
		'kebab'    => strtolower( implode( '-', $pieces ) ),
		'train'    => lcfirst( str_replace( ' ', '-', $upper ) ),
		'cobol'    => strtoupper( implode( '-', $pieces ) ),
		'lower'    => strtolower( $string ),
		'upper'    => strtoupper( $string ),
		'title'    => $upper,
		'sentence' => ucfirst( $lower ),
		'dot'      => strtolower( implode( '.', $pieces ) ),
	];

	return $cases[ $case ];
}

How to use

Copy and paste the helper function into your project, then use it:

echo convert_case( 'This is_an example-string.', 'camel' ); // Outputs: thisIsAnExampleString

Available cases

Case	Example
camel	myNameIsBond
pascal	MyNameIsBond
snake	my_name_is_bond
ada	My_Name_Is_Bond
macro	MY_NAME_IS_BOND
kebab	my-name-is-bond
train	My-Name-Is-Bond
cobol	MY-NAME-IS-BOND
lower	my name is bond
upper	MY NAME IS BOND
title	My Name Is Bond
sentence	My name is bond
dot	my.name.is.bond