CODEWITHSUNDEEP
php
Phil Tune
Phil Tune

Reputation: 3325

How to split camel-cased string by capitals but ignore acronyms

I want to sluggify a camel-cased string by breaking up the words by their capitals, like so:

<?php
$classname = "MyBigClass";
$classname_arr = preg_split('/(?=[A-Z])/', $classname);
$slug = strtolower(implode("-",$classname_arr)); // outputs "my-big-class"
?>

But I don't want it to break up acronyms:

<?php
$classname = "FAQList";
... // outputs "f-a-q-list", I want it to be "faq-list"

How do I accomplish this? I can't find any relavant SO question-answers.

Upvotes: 0

Views: 114

Answers (2)

Jeff
Jeff

Reputation: 6953

although @Wee Zel's answer is allready accepted (and for good reason) I wanna give an extention, that also works for cases like MyFAQ:

<?php
$classname = "MyFAQ";
$classname_arr = preg_split('/(?=[A-Z][^A-Z])|(?<![A-Z])(?=[A-Z])/', $classname);
$slug = strtolower(implode("-", array_filter($classname_arr))); // outputs "my-faq"
echo $slug;

I just combined my first try in comments (a negative lookbehind) with Wee Zel's lookahead.

EDIT:

here's with some test cases. only the last one might not be what we want.

<?php
$classnames = Array("MyFAQ", "myFAQ", "FAQList","myClassName", "youHaveAProblem", "MyClassNNName");

function splitCamelCase($classname) {
   $classname_arr = preg_split('/(?=[A-Z][^A-Z])|(?<![A-Z])(?=[A-Z])/', $classname);
   $slug = strtolower(implode("-", array_filter($classname_arr))); // outputs "my-faq"
   return $slug;
}


foreach($classnames as $classname) {
    echo splitCamelCase($classname)."<br>\n";
}

// output:
// my-faq
// my-faq
// faq-list
// my-class-name
// you-have-a-problem
// my-class-nn-name

Upvotes: 3

Wee Zel
Wee Zel

Reputation: 1324

this checks for the next letter not being uppercase 

$classname_arr = preg_split('/(?=[A-Z][^A-Z])/', $classname);
$slug = strtolower(implode("-", array_filter($classname_arr))); // outputs "my-big-class"
echo $slug;

note: using array_filter() to remove empty elements

Upvotes: 3

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