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I'd like a regexp or other string which can replace everything except alphanumeric chars (a-z and 0-9) from a string. All things such as ,@#$(@*810 should be stripped. Any ideas?
Edit: I now need this to strip everything but allow dots, so everything but a-z, 1-9, .. Ideas?
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A common solution to remove all non-alphanumeric characters from a String is with regular expressions. The idea is to use the regular expression [^A-Za-z0-9] to retain only alphanumeric characters in the string. You can also use [^\w] regular expression, which is equivalent to [^a-zA-Z_0-9] .
Non-alphanumeric characters can be remove by using preg_replace() function. This function perform regular expression search and replace. The function preg_replace() searches for string specified by pattern and replaces pattern with replacement if found.
Using str_ireplace() Method: The str_ireplace() method is used to remove all the special characters from the given string str by replacing these characters with the white space (” “).
You can use preg_replace in this case; $res = preg_replace("/[^0-9]/", "", "Every 6 Months" );
$string = preg_replace("/[^a-z0-9.]+/i", "", $string); Matches one or more characters not a-z 0-9 [case-insensitive], or "." and replaces with ""
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