Question

How to filter digits (numbers and floats) and + - by from a string in PHP

Answer 1

// FILTER_SANITIZE_NUMBER_FLOAT - Removes all illegal characters from a float number
// FILTER_FLAG_ALLOW_FRACTION - Allow fraction separator 

$str = "TOP17-2.1f+3.3point+4X-0.5Z";

$result = filter_var($str, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);

echo $result;




/*
run:

17-2.1+3.3+4-0.5

*/

 

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