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Show Markers on Google Maps According to Post ID in the WordPress
add_filter('wpgmp_markers','wpgmp_markers',1,3 );
function wpgmp_markers($places,$map) {
global $post;
if( $post->ID == 1 ) {
$places = array_slice($places, 1,10);
} else if ($post->ID == 2) {
$places = array_slice($places, 10,10);
} else {
$places = array_slice($places, 20,10);
}
return $places;
}
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