What is the best way to have a text field automatically insert a hyphen after specific numbers?

Is there a way to make a text field insert hyphens automatically after certain numbers?

For example, when typing a date like 20120212, could we have the input automatically formatted with hyphens after the first 4 digits and the second two, so it displays as 2012-02-12?

Answer №1

If you're working with PHP, you can utilize the strtotime function along with date

$old_date = '20120212';
$new_date = date('Y-m-d', strtotime($old_date)); //outputs 2012-02-12

There seems to be some confusion about whether you need this functionality in PHP or JavaScript. In addition to PHP, you can achieve the same result using input masking in jQuery. Check out a great plugin: Masked Input Plugin

To format the input field, you can use:

jQuery(function($){
   $("input").mask("9999-99-99");
});

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