Web Reference: Aug 4, 2020 · preg_replace () returns an array if the subject parameter is an array, or a string otherwise. If matches are found, the new subject will be returned, otherwise subject will be returned unchanged or null if an error occurred. The preg_replace() function returns a string or array of strings where all matches of a pattern or list of patterns found in the input are replaced with substrings. Note that if your page is encoded with UTF-8 then you must add the unicode modifier to the end of the regular expression, so it becomes preg_replace ('/\s+/u', '_', $id); Failure to add this could cause invalid characters in your UTF-8 encoded text.
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Replacing Text Preg Replace Net Worth 2026: Salary, Income & Wealth Net Worth & Biography
Estimated Worth: $8M - $20M
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Last Updated: April 12, 2026
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