how to get post image from attached using id in wordpress

how to get post image in wordpress 
how to  get attached id through post id in worpress


$args = array(
    'numberposts' => 1,
    'order'=> 'DESC',
    'post_mime_type' => 'image',
    'post_parent' =>$post->id,
    'post_type' => 'attachment'
    );

$get_children_array = get_children($args,ARRAY_A);  //returns Array ( [$image_ID]...
$rekeyed_array = array_values($get_children_array);
$child_image = $rekeyed_array[0];
echo '<img src="'.wp_get_attachment_thumb_url($child_image['ID']).'" class="current">';

using post id get image form post data wordpress

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