如何在每个单词后加减号？ [重复]

Question

This question already has an answer here:

• Remove all special characters from a string [duplicate] 3 answers

I am working on youtube video feed, and I want to transform each video title to seotitle.

I have a string like so: 'Kings Of Leon - Use Somebody'

and I want it to be like this: 'Kings-Of-Leon-Use-Somebody'.

I have try this code:

$seotitle=str_replace(' ','-',$video['title']['$t']);

but I get this 'Kings-Of-Leon-Use---Somebody'

What is a good way to handle with extra spaces and minus?

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Answer 1

Try this one:

$string = 'Kings Of Leon - Use Somebody';

// first replace anything but letters with space
$string = preg_replace('/[^a-zA-Z]/', ' ', $string);

// then replace consecutive spaces with hypen
$string = preg_replace('/[ ]+/', '-', trim($string));

See inline comments for detail.