Use FILTER_CALLBACK filter to call a user defined function to filter the value in PHP
Description
The following code shows how to use FILTER_CALLBACK filter to call a user defined function to filter the value.
Example
//from w ww . ja v a 2 s . c om
<?php
function convertSpace($string){
return str_replace(" ", "_", $string);
}
$string = "Peter is a great guy!";
echo filter_var($string, FILTER_CALLBACK,array("options"=>"convertSpace"));
//Using an existing PHP function
echo filter_var($string, FILTER_CALLBACK, array("options"=>"strtoupper"));
?>
The code above generates the following result.
