PHP: Camel Case to Spaces or Underscore

Recently while working on a project, I found I needed to convert camelcase strings to space-separated strings. This same technique will work if you want to convert camelcase to underscore separation as well.

Camel case is frequently used in programming and data storage. Here are a couple of ways to convert it. As usual, feel free to leave better methods in the comments below.

CamelCase to Underscore–

//example: parseServerInfo to parse_server_info
$string = preg_replace(‘/(?<=\\w)(?=[A-Z])/',"_$1", $string); $string = strtolower($string); CamelCase to Spaces–

//example:BachJS to Bach J S
$string = preg_replace(‘/(?<=\\w)(?=[A-Z])/'," $1", $string); $string = trim($string);


About David Kirk

David Kirk is one of the original founders of tech-recipes and is currently serving as editor-in-chief. Not only has he been crafting tutorials for over ten years, but in his other life he also enjoys taking care of critically ill patients as an ICU physician.
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  • xxx

    thank you. how can i convert from underscore to camel? camel is better.