Restrict characters used in a string

Posted by Jeremy Rudd on Stack Overflow See other posts from Stack Overflow or by Jeremy Rudd
Published on 2010-06-15T14:25:24Z Indexed on 2010/06/15 14:42 UTC
Read the original article Hit count: 175

Filed under:

php

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scripting

|

strings

How do I restrict a string to whitelisted characters?

// "HOW am I to understand; this is, BAD"

$str = restrictTo($str,"0-9a-z,. ");

// " am I to understand this is, "

Is there an inbuilt function in PHP that does something close? I can't formulate a regular expression for this though :(

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