Question

I’m trying to take this to this string

**string** = 55 Banana Slush 25 Test into Fifty five Banana Slush twenty five test

Now I have the function to convert any numbers to words which is replaceNumtoWord($number)

However I need to take the string, find each number, then use the function on each number within the string rather then extract the numbers from it.

Any ideas or suggestions?

Answer 1

You can use preg_replace_callback():

$str = preg_replace_callback('/\d+/', function($match) {
    return replaceNumToWord($match[0]);
}, $str);

If you have to use an old PHP version not supporting anonymous functions:

function _num2word_cb($match) {
    return replaceNumToWord($match[0]);        
}
$str = preg_replace_callback('/\d+/', '_num2word_cb', $str);

sidenote: the pattern \d+ will match any sequence of digits, regardless where they would appear, e.g. it will match 10, 20 and 30 in “my10, 20, 30foo”. You can change the pattern to \b\d+\b if you want to match only 20.