How to get node id in drupal 7 -

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i developing drupal 7 module. , have added 2 field "teaser" , "doc" custom content type.

when user create node using content type, he/she adds doc , save node. after saving node image created first page of doc(creating teaser doc) , saved folder using imagemagick lib.

and want node ids link images node. how can node id.

please help!

you should have used node_save($node) method save node. can node id $node object doing this:

$nid = $node->nid;


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