Processing fields

process_field.php

<?php

//NEEDED TO MAKE FIELD PROCESSING POSSIBLE PER FIELD
function mytheme_process_field(&$variables) {
  $function = 'mytheme_process_field__'. $variables['element']['#field_name'];
  if(function_exists($function)) {
    $variables = $function($variables);
  }
}

//EXAMPLE 1: WRAP A GOOGLE MAPS AROUND A CITY FIELD
function mytheme_process_field__field_city (&$variables) {
  //IFRAME WITH ZOOM AND PAN CONTROLS
  // $variables["items"][0]["#markup"] = '<iframe style="background-color: #f6f6f6;" width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://maps.google.be/maps?f=q&amp;source=s_q&amp;hnear=' . $variables["items"][0]["#markup"] . '&amp;z=11&amp;hl=nl&amp;geocode=&amp;q=' . $variables["items"][0]["#markup"] . '&amp;t=v&amp;ie=UTF8&amp;hq=&amp;output=embed"></iframe>';

  //STATIC MAP WITHOUT CONTROLS -> IMG
  $variables["items"][0]["#markup"] = '<img src="http://maps.googleapis.com/maps/api/staticmap?center=' . $variables["items"][0]["#markup"] . '&zoom=11&format=png&sensor=false&size=640x320&maptype=roadmap" />';
  
  return $variables;
}

//EXAMPLE 2: WRAP A YOUTUBE IFRAME PLAYER AROUND A YOUTUBE URL FIELD
function mytheme_process_field__field_youtube (&$variables) {
  if($variables["items"][0]["#markup"]){
    $variables["items"][0]["#markup"] = '<iframe width="560" height="315" src="http://www.youtube.com/embed/' . $variables["items"][0]["#markup"] . '" frameborder="0" allowfullscreen></iframe>';
  }

  return $variables;
}

//EXAMPLE 3: WRAP A GOOGLE MAPS AROUND AN ADDRESS FIELD
function mytheme_process_field__field_address (&$variables) {
  $variables["items"][0]["#markup"] = '<iframe style="background-color: #f6f6f6;" width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://maps.google.be/maps?f=q&amp;source=s_q&amp;hnear=' . $variables["items"][0]["#markup"] . '&amp;z=14&amp;hl=nl&amp;geocode=&amp;q=' . $variables["items"][0]["#markup"] . '&amp;t=v&amp;ie=UTF8&amp;hq=&amp;output=embed"></iframe>';
  
  return $variables;
}