/core/fields/radio.php

<?php 
 
class acf_field_radio extends acf_field 
{ 
  /** 
  *  __construct 
  * 
  *  Set name / label needed for actions / filters 
  * 
  *  @since    3.6 
  *  @date    23/01/13 
  */ 
   
  function __construct() 
  { 
      // vars 
      $this->name = 'radio'; 
      $this->label = __("Radio Button", 'acf'); 
      $this->category = __("Choice", 'acf'); 
      $this->defaults = array( 
          'layout' =>    'vertical',  
          'choices' =>    array(),  
          'default_value' =>    '',  
          'other_choice' =>    0,  
          'save_other_choice' =>    0,  
 ); 
       
       
      // do not delete! 
      parent::__construct(); 
 
  } 
   
       
  /** 
  *  create_field() 
  * 
  *  Create the HTML interface for your field 
  * 
  *  @param    $field - an array holding all the field's data 
  * 
  *  @type    action 
  *  @since    3.6 
  *  @date    23/01/13 
  */ 
   
  function create_field( $field ) 
  { 
      // vars 
      $i = 0; 
      $e = '<ul class="acf-radio-list ' . esc_attr($field['class']) . ' ' . esc_attr($field['layout']) . '">'; 
 
       
      // add choices 
      if( is_array($field['choices']) ) 
      { 
          foreach( $field['choices'] as $key => $value ) 
          { 
              // vars 
              $i++; 
              $atts = ''; 
               
               
              // if there is no value and this is the first of the choices, select this on by default 
              if( $field['value'] === false ) 
              { 
                  if( $i === 1 ) 
                  { 
                      $atts = 'checked="checked" data-checked="checked"'; 
                  } 
              } 
              else 
              { 
                  if( strval($key) === strval($field['value']) ) 
                  { 
                      $atts = 'checked="checked" data-checked="checked"'; 
                  } 
              } 
               
               
              // HTML 
              $e .= '<li><label><input id="' . esc_attr($field['id']) . '-' . esc_attr($key) . '" type="radio" name="' . esc_attr($field['name']) . '" value="' . esc_attr($key) . '" ' . esc_attr( $atts ) . ' />' . $value . '</label></li>'; 
          } 
      } 
       
       
      // other choice 
      if( $field['other_choice'] ) 
      { 
          // vars 
          $atts = ''; 
          $atts2 = 'name="" value="" style="display:none"'; 
           
           
          if( $field['value'] !== false ) 
          { 
              if( !isset($field['choices'][ $field['value'] ]) ) 
              { 
                  $atts = 'checked="checked" data-checked="checked"'; 
                  $atts2 = 'name="' . esc_attr($field['name']) . '" value="' . esc_attr($field['value']) . '"' ; 
              } 
          } 
           
           
          $e .= '<li><label><input id="' . esc_attr($field['id']) . '-other" type="radio" name="' . esc_attr($field['name']) . '" value="other" ' . $atts . ' />' . __("Other", 'acf') . '</label> <input type="text" ' . $atts2 . ' /></li>'; 
      } 
 
 
      $e .= '</ul>'; 
       
      echo $e; 
       
  } 
   
   
  /** 
  *  create_options() 
  * 
  *  Create extra options for your field. This is rendered when editing a field. 
  *  The value of $field['name'] can be used (like bellow) to save extra data to the $field 
  * 
  *  @type    action 
  *  @since    3.6 
  *  @date    23/01/13 
  * 
  *  @param    $field    - an array holding all the field's data 
  */ 
   
  function create_options( $field ) 
  { 
      // vars 
      $key = $field['name']; 
       
      // implode checkboxes so they work in a textarea 
      if( is_array($field['choices']) ) 
      {         
          foreach( $field['choices'] as $k => $v ) 
          { 
              $field['choices'][ $k ] = $k . ' : ' . $v; 
          } 
          $field['choices'] = implode("\n", $field['choices']); 
      } 
       
      ?> 
      <tr class="field_option field_option_<?php echo $this->name; ?>"> 
          <td class="label"> 
              <label for=""><?php _e("Choices", 'acf'); ?></label> 
              <p class="description"><?php _e("Enter your choices one per line", 'acf'); ?><br /> 
              <br /> 
              <?php _e("Red", 'acf'); ?><br /> 
              <?php _e("Blue", 'acf'); ?><br /> 
              <br /> 
              <?php _e("red : Red", 'acf'); ?><br /> 
              <?php _e("blue : Blue", 'acf'); ?><br /> 
              </p> 
          </td> 
          <td> 
              <?php 
               
              do_action('acf/create_field', array( 
                  'type' =>    'textarea',  
                  'class' =>     'textarea field_option-choices',  
                  'name' =>    'fields['.$key.'][choices]',  
                  'value' =>    $field['choices'],  
 )); 
               
              ?> 
              <div class="radio-option-other_choice"> 
              <?php 
               
              do_action('acf/create_field', array( 
                  'type' =>    'true_false',  
                  'name' =>    'fields['.$key.'][other_choice]',  
                  'value' =>    $field['other_choice'],  
                  'message' =>    __("Add 'other' choice to allow for custom values", 'acf') 
 )); 
               
              ?> 
              </div> 
              <div class="radio-option-save_other_choice" <?php if( !$field['other_choice'] ): ?>style="display:none"<?php endif; ?>> 
              <?php 
               
              do_action('acf/create_field', array( 
                  'type' =>    'true_false',  
                  'name' =>    'fields['.$key.'][save_other_choice]',  
                  'value' =>    $field['save_other_choice'],  
                  'message' =>    __("Save 'other' values to the field's choices", 'acf') 
 )); 
               
              ?> 
              </div> 
          </td> 
      </tr> 
      <tr class="field_option field_option_<?php echo $this->name; ?>"> 
          <td class="label"> 
              <label><?php _e("Default Value", 'acf'); ?></label> 
          </td> 
          <td> 
              <?php 
               
              do_action('acf/create_field', array( 
                  'type' =>    'text',  
                  'name' =>    'fields['.$key.'][default_value]',  
                  'value' =>    $field['default_value'],  
 )); 
               
              ?> 
          </td> 
      </tr> 
      <tr class="field_option field_option_<?php echo $this->name; ?>"> 
          <td class="label"> 
              <label for=""><?php _e("Layout", 'acf'); ?></label> 
          </td> 
          <td> 
              <?php 
               
              do_action('acf/create_field', array( 
                  'type' =>    'radio',  
                  'name' =>    'fields['.$key.'][layout]',  
                  'value' =>    $field['layout'],  
                  'layout' => 'horizontal',  
                  'choices' => array( 
                      'vertical' => __("Vertical", 'acf'),  
                      'horizontal' => __("Horizontal", 'acf') 
 ) 
 )); 
               
              ?> 
          </td> 
      </tr> 
      <?php 
       
  } 
   
   
  /** 
  *  update_value() 
  * 
  *  This filter is appied to the $value before it is updated in the db 
  * 
  *  @type    filter 
  *  @since    3.6 
  *  @date    23/01/13 
  * 
  *  @param    $value - the value which will be saved in the database 
  *  @param    $post_id - the $post_id of which the value will be saved 
  *  @param    $field - the field array holding all the field options 
  * 
  *  @return    $value - the modified value 
  */ 
   
  function update_value( $value, $post_id, $field ) 
  { 
      // validate 
      if( $field['save_other_choice'] ) 
      { 
          // value isn't in choices yet 
          if( !isset($field['choices'][ $value ]) ) 
          { 
              // update $field 
              $field['choices'][ $value ] = $value; 
               
               
              // can save 
              if( isset($field['field_group']) ) 
              { 
                  do_action('acf/update_field', $field, $field['field_group']); 
              } 
               
          } 
      }         
       
      return $value; 
  } 
   
} 
 
new acf_field_radio(); 
 
?>