preg_replace_callback

  • We can implement a callback for regular expression replacement by passing a block to String#gsub. Matches are passed as block arguments.

    PHP

    function func($matches)
{
    return strtoupper($matches[0]);
}
$string = 'joe@example.com; walter@example.org';
$result = preg_replace_callback('/@([a-z0-9-]+)/', 'func', $string);
 
var_export($result);
// => 'joe@EXAMPLE.com; walter@EXAMPLE.org'

    Ruby

    def my_method(match)
  match.upcase
end
 
my_string = "joe@example.com; walter@example.org"
p my_string.gsub(/@([a-z0-9-]+)/){ |match| my_method(match) }
# => "joe@EXAMPLE.com; walter@EXAMPLE.org"

    see also

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