See Python PEP 8: Function and Variable Names: Function names should be lowercase, with words separated by underscores as necessary to improve readability. Variable names follow the same convention as function names. mixedCase is allowed only in contexts where that’s already the prevailing style (e.g. threading.py), to retain backwards compatibility.
A shorter solution: Similar to the editor’s one with a simplified regular expression and fixing the “trailing-underscore” problem: $output = strtolower(preg_replace(‘/(?<!^)[A-Z]/’, ‘_$0’, $input)); PHP Demo | Regex Demo Note that cases like SimpleXML will be converted to simple_x_m_l using the above solution. That can also be considered a wrong usage of camel case notation (correct … Read more
In this document Google JSON Style Guide (recommendations for building JSON APIs at Google), It recommends that: Property names must be camelCased, ASCII strings. The first character must be a letter, an underscore (_), or a dollar sign ($). Example: { “thisPropertyIsAnIdentifier”: “identifier value” } My team consistently follows this convention when building REST APIs. … Read more