How to declare a specific snippet in textmate {MAC}

i don't know if this is the r开发者_StackOverflowight place, but i would know how to declare a new macro/snippet in textmate to do this :

I select the text

Sample Text

I use whatever combinaison of key and it transforms it into :

<?php echo __('Sample Text') ?>

Thank you ;)

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ok, i manage to get this working :

by adding a new snipppet :D