php - Put limit on wordpress custom fields -

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i trying limit wordpress custom fields fetching through loop , want first 2 results. not familiar php.

here code below using, 

<?php    $gallery_data = get_post_meta( $post->id, 'gallery_data', true );   if ( isset( $gallery_data['image_url'] ) ) {     for(        $i = 0;        $i < count( $gallery_data['image_url'] );        $i++ ) { ?>  <div class="clearfix audio-block">   <span class="play-btn in-spa" play-url="<?php esc_html_e( $gallery_data['image_url'][$i] ); ?>">     <a href=""> <i class="glyphicon glyphicon-play"></i></a>   </span>    <span class="recite-nam in-spa">      <?php esc_html_e( $gallery_data['text_url'][$i] );  ?>   </span> </div>   <?php   } } ?>


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