Delete double values using php inside an array (wp-query and ACF) -

i'm using advanced custom fields on website select field (type_evenement) 5 possible values (val_1, val_2, val_3, val_4, val_5)

i'm using wp query on custom template page display posts category, posts uses "select" custom field.

i'm trying display select values on page, once, i'm trying delete double values, using array_unique, it's not working.

here code wrote display values inside loop, display values, when double, example, val_1, val_3, val_4, val_2, val_1, val_1...

<?php   // args $today = date("ymd");   $args = array ( 'category' => 5, 'posts_per_page' => -1, 'meta_key'       => 'debut_date', 'orderby'       => 'meta_value_num', 'order'          => 'asc', 'meta_query' => array( array( 'key'       => 'fin_date', 'compare'   => '>=', 'value'     => $today, ) ), );  // results $the_query = new wp_query( $args );  // loop ?>  <?php if( $the_query->have_posts() ): ?>  <?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>          <?php         $input = get_field('type_evenement');         echo($input);         ?>   <?php endwhile; ?>  <?php endif; ?>  <?php wp_reset_query(); ?> 

but when using array_unique, nothing displayed anymore :

<?php $input = get_field('type_evenement'); $result = array_unique($input); echo($result); ?> 

i don't understand i'm doing wrong, know get_field returns array, guess array_unique should work no ?

if can me nice !

thanks lot

$input single value, not array. duplicates repeatedly assigned value while loop.

<?php while ( $the_query->have_posts() ) : $the_query->the_post();       $input = get_field('type_evenement');      echo($input); 

you either fix query returns duplicate, since looks wordpress, might not going work.

so fill array first, use array_unique() , echo values (or simple not add value again, if temporary array contains it):

$myarr = array();  while ( $the_query->have_posts() ) {     $the_query->the_post();     $input = get_field('type_evenement');      if (!in_array($input,$myarr)){       $myarr[] = $input;     }  }   foreach ($myarr $value){     echo $value; //unique values.  }