N°5655 - Add utils::ToSnakeCase() method

application/utils.inc.php

@@ -3045,18 +3045,35 @@ HTML;
 	}
 
 	/**
-	 * Transform a snake_case $sInput into a CamelCase string
-	 *
 	 * @param string $sInput
 	 *
-	 * @return string
+	 * @return string Camel case representation of $sInput (eg. "something_new" becomes "SomethingNew")
 	 * @since 2.7.0
 	 */
-	public static function ToCamelCase($sInput)
+	public static function ToCamelCase($sInput): string
 	{
 		return str_replace(' ', '', ucwords(strtr($sInput, '_-', '  ')));
 	}
 
+	/**
+	 * @param string $sInput
+	 *
+	 * @return string Snake case representation of $sInput (eg. "SomethingNew" becomes "something_new")
+	 * @since 3.1.0
+	 * @link https://stackoverflow.com/a/19533226/2710325
+	 */
+	public static function ToSnakeCase(string $sInput): string
+	{
+		// Remove special chars to join words
+		$sOutput = preg_replace('/(\W)/', '_', $sInput);
+		// Transform camel case words to snake case
+		$sOutput = preg_replace('/[A-Z]([A-Z](?![a-z]))*/', '_$0', $sOutput);
+		// Lowercase everything
+		$sOutput = mb_strtolower($sOutput);
+		// Trim outer underscores
+		return trim($sOutput, '_');
+	}
+
 	/**
 	 * @param string $sInput
 	 *