Adding custom image fields and other fields at the same time

Question

I basically want to have a custom CMS page that has pairs of images and labels for those images defined within it. I intend to use these pairs of items for populating conte

Answer 1

For Wordpress 3.5 new media uploader will open with this script change script with old one.

<script type="text/javascript">
    function add_image(obj) {

        var parent=jQuery(obj).parent().parent('div.field_row');
        var inputField = jQuery(parent).find("input.meta_image_url");
        var fileFrame = wp.media.frames.file_frame = wp.media({
            multiple: false
        });
        fileFrame.on('select', function() {
            var url = fileFrame.state().get('selection').first().toJSON();
            inputField.val(url.url);
            jQuery(parent)
            .find("div.image_wrap")
            .html('<img src="'+url.url+'" height="48" width="48" />');
        });
        fileFrame.open();
    //});
    };

    function reomove_field(obj) {
        var parent=jQuery(obj).parent().parent();
        //console.log(parent)
        parent.remove();
    }

    function add_field_row() {
        var row = jQuery('#master-row').html();
        jQuery(row).appendTo('#field_wrap');
    }
</script>

Answer 2

You don't exactly mention it, but it seems that you are dealing with Repeatable Fields.

Two plugins of interest: Advanced Custom Fields and Custom Content Type Manager.

Today, I've seen this article in one of WordPress communities at G+:
Using the WordPress 3.5 Media Uploader within plugins.

This solution was originally published here in a SO Question that has been deleted since. It is rewritten, revised and tested:

<?php
/**
 * Plugin Name: (SO) Repeatable fields demo
 * Plugin URI:  http://stackoverflow.com/a/14452453/1287812
 * Description: How to make repeatable fields in a meta box
 * Author:      brasofilo
 * License:     GPLv3
 */

add_action( 'admin_init', 'add_post_gallery_so_14445904' );
add_action( 'admin_head-post.php', 'print_scripts_so_14445904' );
add_action( 'admin_head-post-new.php', 'print_scripts_so_14445904' );
add_action( 'save_post', 'update_post_gallery_so_14445904', 10, 2 );

/**
 * Add custom Meta Box to Posts post type
 */
function add_post_gallery_so_14445904() 
{
    add_meta_box(
        'post_gallery',
        'Custom Uploader',
        'post_gallery_options_so_14445904',
        'post',
        'normal',
        'core'
    );
}

/**
 * Print the Meta Box content
 */
function post_gallery_options_so_14445904() 
{
    global $post;
    $gallery_data = get_post_meta( $post->ID, 'gallery_data', true );

    // Use nonce for verification
    wp_nonce_field( plugin_basename( __FILE__ ), 'noncename_so_14445904' );
?>

<div id="dynamic_form">

    <div id="field_wrap">
    <?php 
    if ( isset( $gallery_data['image_url'] ) ) 
    {
        for( $i = 0; $i < count( $gallery_data['image_url'] ); $i++ ) 
        {
        ?>

        <div class="field_row">

          <div class="field_left">
            <div class="form_field">
              <label>Image URL</label>
              <input type="text"
                     class="meta_image_url"
                     name="gallery[image_url][]"
                     value="<?php esc_html_e( $gallery_data['image_url'][$i] ); ?>"
              />
            </div>
            <div class="form_field">
              <label>Description</label>
              <input type="text"
                     class="meta_image_desc"
                     name="gallery[image_desc][]"
                     value="<?php esc_html_e( $gallery_data['image_desc'][$i] ); ?>"
              />
            </div>
          </div>

          <div class="field_right image_wrap">
            <img src="<?php esc_html_e( $gallery_data['image_url'][$i] ); ?>" height="48" width="48" />
          </div>

          <div class="field_right">
            <input class="button" type="button" value="Choose File" onclick="add_image(this)" /><br />
            <input class="button" type="button" value="Remove" onclick="remove_field(this)" />
          </div>

          <div class="clear" /></div> 
        </div>
        <?php
        } // endif
    } // endforeach
    ?>
    </div>

    <div style="display:none" id="master-row">
    <div class="field_row">
        <div class="field_left">
            <div class="form_field">
                <label>Image URL</label>
                <input class="meta_image_url" value="" type="text" name="gallery[image_url][]" />
            </div>
            <div class="form_field">
                <label>Image Link</label>
                <input class="meta_image_desc" value="" type="text" name="gallery[image_desc][]" />
            </div>
        </div>
        <div class="field_right image_wrap">
        </div> 
        <div class="field_right"> 
            <input type="button" class="button" value="Choose File" onclick="add_image(this)" />
            <br />
            <input class="button" type="button" value="Remove" onclick="remove_field(this)" /> 
        </div>
        <div class="clear"></div>
    </div>
    </div>

    <div id="add_field_row">
      <input class="button" type="button" value="Add Field" onclick="add_field_row();" />
    </div>

</div>

  <?php
}

/**
 * Print styles and scripts
 */
function print_scripts_so_14445904()
{
    // Check for correct post_type
    global $post;
    if( 'post' != $post->post_type )
        return;
    ?>  
    <style type="text/css">
      .field_left {
        float:left;
      }

      .field_right {
        float:left;
        margin-left:10px;
      }

      .clear {
        clear:both;
      }

      #dynamic_form {
        width:580px;
      }

      #dynamic_form input[type=text] {
        width:300px;
      }

      #dynamic_form .field_row {
        border:1px solid #999;
        margin-bottom:10px;
        padding:10px;
      }

      #dynamic_form label {
        padding:0 6px;
      }
    </style>

    <script type="text/javascript">
        function add_image(obj) {
            var parent=jQuery(obj).parent().parent('div.field_row');
            var inputField = jQuery(parent).find("input.meta_image_url");

            tb_show('', 'media-upload.php?TB_iframe=true');

            window.send_to_editor = function(html) {
                var url = jQuery(html).find('img').attr('src');
                inputField.val(url);
                jQuery(parent)
                .find("div.image_wrap")
                .html('<img src="'+url+'" height="48" width="48" />');

                // inputField.closest('p').prev('.awdMetaImage').html('<img height=120 width=120 src="'+url+'"/><p>URL: '+ url + '</p>'); 

                tb_remove();
            };

            return false;  
        }

        function remove_field(obj) {
            var parent=jQuery(obj).parent().parent();
            //console.log(parent)
            parent.remove();
        }

        function add_field_row() {
            var row = jQuery('#master-row').html();
            jQuery(row).appendTo('#field_wrap');
        }
    </script>
    <?php
}

/**
 * Save post action, process fields
 */
function update_post_gallery_so_14445904( $post_id, $post_object ) 
{
    // Doing revision, exit earlier **can be removed**
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )  
        return;

    // Doing revision, exit earlier
    if ( 'revision' == $post_object->post_type )
        return;

    // Verify authenticity
    if ( !wp_verify_nonce( $_POST['noncename_so_14445904'], plugin_basename( __FILE__ ) ) )
        return;

    // Correct post type
    if ( 'post' != $_POST['post_type'] ) 
        return;

    if ( $_POST['gallery'] ) 
    {
        // Build array for saving post meta
        $gallery_data = array();
        for ($i = 0; $i < count( $_POST['gallery']['image_url'] ); $i++ ) 
        {
            if ( '' != $_POST['gallery']['image_url'][ $i ] ) 
            {
                $gallery_data['image_url'][]  = $_POST['gallery']['image_url'][ $i ];
                $gallery_data['image_desc'][] = $_POST['gallery']['image_desc'][ $i ];
            }
        }

        if ( $gallery_data ) 
            update_post_meta( $post_id, 'gallery_data', $gallery_data );
        else 
            delete_post_meta( $post_id, 'gallery_data' );
    } 
    // Nothing received, all fields are empty, delete option
    else 
    {
        delete_post_meta( $post_id, 'gallery_data' );
    }
}

Result:

Answer 3

I used @brasofilo's answer above, however I really missed having the image ID saved as well, so I could use wp_get_attachment_imagefor example.

So here's my revised code, which also saves the image ID. I also use two arrays to define on which page templates and respectively on which post types the meta box appears. Here's the code:

<?php
/**
 * Plugin Name: Repeatable image fields
 * Plugin URI:  https://stackoverflow.com/a/36456957/4800442
 * Description: Repeatable image fields in a meta box.
 * Author:      brasofilo
 * License:     GPLv3
 */

add_action( 'admin_init', 'add_post_gallery_so_14445904' );
add_action( 'add_meta_boxes_page', 'add_page_gallery_so_14445904' );
add_action( 'admin_head-post.php', 'print_scripts_so_14445904' );
add_action( 'admin_head-post-new.php', 'print_scripts_so_14445904' );
add_action( 'save_post', 'update_post_gallery_so_14445904', 10, 2 );

// Make it work only in selected templates
$rep_fields_templates = array('page-aboutus.php');
$rep_fields_posts     = array('service',
                              'style',
                              'brand');

/**
 * Add custom Meta Box
 */

// Add meta box to custom posts 
function add_post_gallery_so_14445904() 
{
    global $rep_fields_posts;       
    add_meta_box(
        'post_gallery',
        'Slideshow Gallery',
        'post_gallery_options_so_14445904',
        $rep_fields_posts,
        'normal',
        'core'
    );
}

// Add meta box to custom page templates
function add_page_gallery_so_14445904() 
{       
    global $post, $rep_fields_templates;
    if ( in_array( get_post_meta( $post->ID, '_wp_page_template', true ), $rep_fields_templates ) ) {
        add_meta_box(
            'post_gallery',
            'Slideshow Gallery',
            'post_gallery_options_so_14445904',
            'page',
            'normal',
            'core'
        );
    }
}

/**
 * Print the Meta Box content
 */
function post_gallery_options_so_14445904() 
{
    global $post;
    $gallery_data = get_post_meta( $post->ID, 'gallery_data', true );

    // Use nonce for verification
    wp_nonce_field( plugin_basename( __FILE__ ), 'noncename_so_14445904' );
    ?>

    <div id="dynamic_form">

        <div id="field_wrap">
        <?php 
        if ( isset( $gallery_data['image_url'] ) ) 
        {
            for( $i = 0; $i < count( $gallery_data['image_url'] ); $i++ ) 
            {
            ?>

            <div class="field_row">

              <div class="field_left">
                <div class="form_field">
                  <!--<label>Image URL</label>-->
                  <input type="hidden"
                         class="meta_image_url"
                         name="gallery[image_url][]"
                         value="<?php esc_html_e( $gallery_data['image_url'][$i] ); ?>"
                  />
                  <input type="hidden"
                         class="meta_image_id"
                         name="gallery[image_id][]"
                         value="<?php esc_html_e( $gallery_data['image_id'][$i] ); ?>"
                  />
                </div>
                <div class="form_field" style="margin-bottom: 20px">
                  <label>Description</label>
                  <textarea
                         class="meta_image_desc"
                         name="gallery[image_desc][]"
                         rows="3"
                         style="width: 100%"><?php esc_html_e( $gallery_data['image_desc'][$i] ); ?></textarea>
                </div>
                <input class="button" type="button" value="Choose File" onclick="add_image(this)" />&nbsp;&nbsp;&nbsp;
                <input class="button" type="button" value="Remove" onclick="remove_field(this)" />
              </div>

              <div class="field_right image_wrap">
                <img src="<?php esc_html_e( $gallery_data['image_url'][$i] ); ?>" />
              </div>
              <div class="clear" /></div> 
            </div>
            <?php
            } // endif
        } // endforeach
        ?>
        </div>

        <div style="display:none" id="master-row">
        <div class="field_row">
            <div class="field_left">
                <div class="form_field">
                    <!--<label>Image URL</label>-->
                    <input class="meta_image_url" value=""  name="gallery[image_url][]" />
                    <input class="meta_image_id" value=""  name="gallery[image_id][]" />
                </div>
                <div class="form_field" style="margin-bottom: 20px">
                    <label>Description</label>
                    <textarea class="meta_image_desc" name="gallery[image_desc][]" rows="3" style="width: 100%"></textarea>
                </div>
                <input type="button" class="button" value="Choose Image" onclick="add_image(this)" />&nbsp;&nbsp;&nbsp;
                <input class="button" type="button" value="Remove" onclick="remove_field(this)" />
            </div>
            <div class="field_right image_wrap">
            </div>
            <div class="clear"></div>
        </div>
        </div>

        <div id="add_field_row">
          <input class="button" type="button" value="Add Image" onclick="add_field_row();" />
        </div>
        <?php if ( 'trend' == get_post_type( $post->ID ) ) { ?>
        <p style="color: #a00;">Make sure the number if images you add is a <b>multiple of 5</b>.</p>
        <?php } ?>
    </div>
    <?php
}

/**
 * Print styles and scripts
 */
function print_scripts_so_14445904()
{
    // Check for correct post_type
    global $post, $rep_fields_templates, $rep_fields_posts;
    if ( !in_array( get_post_meta( $post->ID, '_wp_page_template', true ), $rep_fields_templates ) && 
         !in_array( get_post_type( $post->ID)                           , $rep_fields_posts ) )
        return;
    ?>  
    <style type="text/css">
      .field_left {
        float:left;
        width: 75%;
        padding-right: 20px;
        box-sizing:border-box;  
      }
      .field_right {
        float:left;
        width: 25%;
      }
      .image_wrap img {
          max-width: 100%;
      }
      #dynamic_form input[type=text] {
        width:100%;
      }
      #dynamic_form .field_row {
        border:1px solid #cecece;
        margin-bottom:10px;
        padding:10px;
      }
      #dynamic_form label {
        display: block;
        margin-bottom: 5px;
      }
    </style>

    <script type="text/javascript">
        function add_image(obj) {

            var parent=jQuery(obj).parent().parent('div.field_row');
            var inputField = jQuery(parent).find("input.meta_image_url");
            var inputFieldID = jQuery(parent).find("input.meta_image_id");
            var fileFrame = wp.media.frames.file_frame = wp.media({
                multiple: false
            });
            fileFrame.on('select', function() {
                var selection = fileFrame.state().get('selection').first().toJSON();
                inputField.val(selection.url);
                inputFieldID.val(selection.id);
                jQuery(parent)
                .find("div.image_wrap")
                .html('<img src="'+selection.url+'" />');
            });
            fileFrame.open();
        //});
        };

        function remove_field(obj) {
            var parent=jQuery(obj).parent().parent();
            parent.remove();
        }

        function add_field_row() {
            var row = jQuery('#master-row').html();
            jQuery(row).appendTo('#field_wrap');
        }
    </script>
    <?php
}

/**
 * Save post action, process fields
 */
function update_post_gallery_so_14445904( $post_id, $post_object ) 
{
    // Doing revision, exit earlier **can be removed**
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )  
        return;

    // Doing revision, exit earlier
    if ( 'revision' == $post_object->post_type )
        return;

    // Verify authenticity
    if ( !wp_verify_nonce( $_POST['noncename_so_14445904'], plugin_basename( __FILE__ ) ) )
        return;

    global $rep_fields_templates, $rep_fields_posts;
    if ( !in_array( get_post_meta( $post_id, '_wp_page_template', true ), $rep_fields_templates ) && 
         !in_array( get_post_type( $post_id)                            , $rep_fields_posts ) ) 
        return;

    if ( $_POST['gallery'] ) 
    {
        // Build array for saving post meta
        $gallery_data = array();
        for ($i = 0; $i < count( $_POST['gallery']['image_url'] ); $i++ ) 
        {
            if ( '' != $_POST['gallery']['image_url'][ $i ] ) 
            {
                $gallery_data['image_url'][]  = $_POST['gallery']['image_url'][ $i ];
                $gallery_data['image_id'][]  = $_POST['gallery']['image_id'][ $i ];
                $gallery_data['image_desc'][] = $_POST['gallery']['image_desc'][ $i ];
            }
        }

        if ( $gallery_data ) 
            update_post_meta( $post_id, 'gallery_data', $gallery_data );
        else 
            delete_post_meta( $post_id, 'gallery_data' );
    } 
    // Nothing received, all fields are empty, delete option
    else 
    {
        delete_post_meta( $post_id, 'gallery_data' );
    }
}

Here's an example of how you can output the data to your theme.

<?php 
if ( '' != get_post_meta( get_the_ID(), 'gallery_data', true ) ) { $gallery = get_post_meta( get_the_ID(), 'gallery_data', true ); }

if ( isset( $gallery['image_id'] ) ) :

    for( $i = 0; $i < count( $gallery['image_id'] ); $i++ ) { 
        if ( '' != $gallery['image_id'][$i] ) {
            echo wp_get_attachment_image( $gallery['image_id'][$i], 'gallery_large' );
            if ( isset($gallery['image_desc'][$i]) ) echo $gallery['image_desc'][$i];
        }   
    }

endif; 
?>