Replace multiple dashes with one dash

you can use

<?php
$string="something-------another--thing";
echo $str = preg_replace('/-{2,}/','-',$string);

Output

something-another-thing

Use preg_replace to replace a pattern.

$str = preg_replace('/-+/', '-', $str);

The regular expression -+ matches any sequence of 1 or more hyphen characters.

If you don't understand regular expressions, read the tutorial at www.regular-expression.info.

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