PHP session value defined in one file, is undefined in another file -

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i have 2 php files, in first file:

    <?php         session_start();     . . .         $_session['favcolor'] = "green";         echo "ses: ".$_session['favcolor'];     ?>

and in second file:

<?php     session_start();     echo "ses: ".$_session['favcolor']; ?>

when executing first page, see correct favcolor when executing second page in same browser, {"error":"undefined index: favcolor"}. know need check existence of key before using wondering why it's not there in first place because want achieve, store/restore session value between php calls. missing?


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