How to loop through this data? - wordpress

Question

I am trying to get the term id from this data returned by get_terms_by()
WP_Term Object ( [term_id] => 29 [name] => gps [slug] => gps [term_group] => 0 [term_taxonomy_id] => 29 [taxonomy] => post_tag [description] => [parent] => 0 [count] => 1 [filter] => raw )
WP_Term Object ( [term_id] => 16 [name] => joystick [slug] => joystick [term_group] => 0 [term_taxonomy_id] => 16 [taxonomy] => post_tag [description] => [parent] => 0 [count] => 3 [filter] => raw )
WP_Term Object ( [term_id] => 14 [name] => lcd [slug] => lcd [term_group] => 0 [term_taxonomy_id] => 14 [taxonomy] => post_tag [description] => [parent] => 0 [count] => 3 [filter] => raw )
but it returns the data in the form of a string
$data = get_term_by('name', $tag , 'post_tag');
print_r($data);
foreach ($data as $tag_id) {
echo $tag_id['term_id'];
}
I want this [term_id] => 29
only term_id

Answer 1

The function get_term_by has a parameter called $output. If you specify it you should get an array back:
$term = get_term_by( 'name', $tag, 'post_tag' );
if ( $term ) {
echo $term->term_id;
}
else {
echo 'Term not found';
}

Answer 2

First of all, you cant get just [term_id] => 291 because you have 3 terms in result, you can have array $term_ids = array(29, 16, 14);
$data = get_term_by('name', $tag , 'post_tag');
$term_ids = array();
foreach ($data as $term) {
$term_ids[] = $term->term_id;
}
print_r($term_ids);