i'm working on class names and i need to check if there is any upper camel case name and break it this way:
"UserManagement" becomes "user-management"
or
"SiteContentManagement" becomes "site-content-management"
after extensive search i only found various use of ucfirst, strtolower,strtoupper, ucword and i can't see how to use them to suit my needs any ideas?
thanks for reading ;)
You can use preg_replace to replace any instance of a lowercase letter followed with an uppercase with your lower-dash-lower variant:
$dashedName = preg_replace('/([^A-Z-])([A-Z])/', '$1-$2', $className);
Then followed by a strtolower() to take care of any remaining uppercase letters:
return strtolower($dashedName);
The full function here:
function camel2dashed($className) {
return strtolower(preg_replace('/([^A-Z-])([A-Z])/', '$1-$2', $className));
}
To explain the regular expression used:
/ Opening delimiter
( Start Capture Group 1
[^A-Z-] Character Class: Any character NOT an uppercase letter and not a dash
) End Capture Group 1
( Start Capture Group 2
[A-Z] Character Class: Any uppercase letter
) End Capture Group 2
/ Closing delimiter
As for the replacement string
$1 Insert Capture Group 1
- Literal: dash
$2 Insert Capture Group 2
Theres no built in way to do it.
This will ConvertThis into convert-this:
$str = preg_replace('/([a-z])([A-Z])/', '$1-$2', $str);
$str = strtolower($str);
You can use a regex to get each words, then add the dashes like this:
preg_match_all ('/[A-Z][a-z]+/', $className, $matches); // get each camelCase words
$newName = strtolower(implode('-', $matches[0])); // add the dashes and lowercase the result
This simply done without any capture groups -- just find the zero-width position before an uppercase letter (excluding the first letter of the string), then replace it with a hyphen, then call strtolower on the new string.
Code: (Demo)
echo strtolower(preg_replace('~(?!^)(?=[A-Z])~', '-', $string));
The lookahead (?=...) makes the match but doesn't consume any characters.
The best way to do that might be preg_replace using a pattern that replaces uppercase letters with their lowercase counterparts adding a "-" before them.
You could also go through each letter and rebuild the whole string.
