Question

I want to check user input in the textbox. If the first character is a zero, it will be replaced with +63. But it should not replace all the zeroes in the string. I had search through sites but most are about replacing all of the occurrences. Thanks a lot!

Answer 1

In PHP:

<?php 
$ptn = "/^0/";  // Regex
$str = "01234"; //Your input, perhaps $_POST['textbox'] or whatever
$rpltxt = "+63";  // Replacement string
echo preg_replace($ptn, $rpltxt, $str);
?>

Would echo out:

+631234

Of course, you’ll want to validate the input and everything, but that’s how you’d replace it after it’s been submitted.