Wordpress Deleting downloaded images on metabox with file - wordpress

Question

require_once(ABSPATH . '/wp-load.php');
require_once(ABSPATH . '/wp-admin/includes/file.php');
require_once(ABSPATH . '/wp-admin/includes/image.php');
$upload_overrides = array( 'test_form' => FALSE );
$count_files = count( $_FILES['my_files'] );
$uploads = wp_upload_dir();
foreach ( range( 0, $count_files ) as $i ) {
// create an array of the $_FILES for each file
$file_array = array(
'name' => $_FILES['files']['name'][$i],
'type' => $_FILES['files']['type'][$i],
'tmp_name' => $_FILES['files']['tmp_name'][$i],
'error' => $_FILES['files']['error'][$i],
'size' => $_FILES['files']['size'][$i],
);
// check to see if the file name is not empty
if ( !empty( $file_array['name'] ) ) {
// upload the file to the server
$uploaded_file = wp_handle_upload( $file_array, $upload_overrides );
// checks the file type and stores in in a variable
$wp_filetype = wp_check_filetype( basename( $uploaded_file['file'] ), null );
if ( $uploaded_file && !isset( $uploaded_file['error'] ) ) {
$ufiles = get_post_meta( $post_id, 'my_files', true );
if( empty( $ufiles ) ) $ufiles = array();
$ufiles[] = $uploaded_file;
update_post_meta( $post_id, 'my_files', $ufiles );
}
}
}
I am able to download files to metabox thanks to this code.
Output of the database is looks like what i show in the below
a:2:{i:0;a:3:{s:4:"file";s:48:"D:xampphtdocswp/wp-content/uploads/2016/08/2.jpg";s:3:"url";s:52:"http://localhost/wp/wp-content/uploads/2016/08/2.jpg";s:4:"type";s:10:"image/jpeg";}i:1;a:3:{s:4:"file";s:59:"D:xampphtdocswp/wp-content/uploads/2016/08/2da83a4s-960.jpg";s:3:"url";s:63:"http://localhost/wp/wp-content/uploads/2016/08/2da83a4s-960.jpg";s:4:"type";s:10:"image/jpeg";}}
I want to delete the images that i dont want with delete_post_meta method while i am selecting checkboxes on my update page.
$galleri = get_post_meta($id,'my_files',true);
<div class="galeri">
<?php
foreach($galleri as $galeri){
echo "<div style='margin:10px;display:inline-block;'><input type='checkbox' name='car_image_delete[]' value='".$galeri['url']."' /><img src='".$galeri['url']."' width='150' height='150'/></div>";
}
?>
</div>
I appreciate if you help me

Answer 1

Try this:
Use update_post_meta() function instead of delete_post_meta().
While using delete_post_meta(), it will delete custom fields.
So if you want to delete particular one file. You need to use update_post_meta().
$string = 'a:2:{i:0;a:3:{s:4:"file";s:48:"D:xampphtdocswp/wp-content/uploads/2016/08/2.jpg";s:3:"url";s:52:"http://localhost/wp/wp-content/uploads/2016/08/2.jpg";s:4:"type";s:10:"image/jpeg";}i:1;a:3:{s:4:"file";s:59:"D:xampphtdocswp/wp-content/uploads/2016/08/2da83a4s-960.jpg";s:3:"url";s:63:"http://localhost/wp/wp-content/uploads/2016/08/2da83a4s-960.jpg";s:4:"type";s:10:"image/jpeg";}}';
$arr = unserialize($string); //USE get_post_meta() function instead of
$index = array_search('http://localhost/wp/wp-content/uploads/2016/08/2da83a4s-960.jpg',array_column( $arr, 'url')); //search index
echo $index;
if (array_key_exists($index,$arr))
{
unset($arr[$index]); //remove array index
}
print_r($arr); //array with only value.
//use array_values() to reindex
update_post_meta($post_id, 'my_files', $arr); //update post meta