[WordPress] Working with Associative Array Values in WordPress

00-one-dimension.php

<?php

$one_dimension = array();
foreach ( $multi_dimension as $element ) {
  
  foreach ( $element as $key => $value ) {
    $one_dimension[ $key ] = $value;
  }
}

01-process-array.php

<?php

foreach ( $one_dimension as $element ) {
  // Process $one_dimension[ $element ].
}