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Multi-file WordPress uploads from the front-end

View file-upload-handler.php
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<?php /* This function attaches the image to the post in the database, add it to functions.php */
function insert_attachment($file_handler,$post_id,$setthumb='false') {
// check to make sure its a successful upload
if ($_FILES[$file_handler]['error'] !== UPLOAD_ERR_OK) __return_false();
require_once(ABSPATH . "wp-admin" . '/includes/image.php');
require_once(ABSPATH . "wp-admin" . '/includes/file.php');
require_once(ABSPATH . "wp-admin" . '/includes/media.php');
$attach_id = media_handle_upload( $file_handler, $post_id );
if ($setthumb) update_post_meta($post_id,'_thumbnail_id',$attach_id);
return $attach_id;
} ?>
View file-upload-handler.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
<?php /* Also in the template file, this script processes any $_POST data and hands off the images to the insert_attachment() function. Again you may want to wrap this in a current_user_can conditional, and probably do some sanity checks on incoming $_POST data. */
global $post;
if ( $_FILES ) {
$files = $_FILES['upload_attachment'];
foreach ($files['name'] as $key => $value) {
if ($files['name'][$key]) {
$file = array(
'name' => $files['name'][$key],
'type' => $files['type'][$key],
'tmp_name' => $files['tmp_name'][$key],
'error' => $files['error'][$key],
'size' => $files['size'][$key]
);
$_FILES = array("upload_attachment" => $file);
foreach ($_FILES as $file => $array) {
$newupload = insert_attachment($file,$post->ID);
}
}
}
} ?>
View file-upload-handler.php
1 2 3
<!-- This is the form that you add to the template file. You probably want to wrap this in a current_user_can conditional. -->
 
<form action="#" method="post" enctype="multipart/form-data"><input type="file" name="upload_attachment[]" /> <input type="submit" value="Upload" /></form>

Dude you have really helped me out here, i've been scratching my head for an hour. Also i added this to check whether it's an image or not

foreach ($_FILES as $file => $array) {
    if(getimagesize($array['tmp_name'])){
        $newupload = insert_attachment($file,$pid);
    }else{
        // Wrong file type
    }
}

it's not working for me.

help to use it for my project

Thanks!!!

For show:

<?php
$attachments = get_posts(
array(
'post_type' => 'attachment',
'numberposts' => -1,
'post_status' => null,
'post_parent' => $current_post, // check you print ID post
));
if ( !$attachments )
echo "No images";
else
{
foreach ( $attachments as $attachment ) {
the_attachment_link( $attachment->ID , false );
apply_filters( 'the_title' , $attachment->post_title );
}
} ?>

Thanks a lot!!

darnin commented

Thank you for your sharing, it works!

DLHC commented

Hi,i want to use this as attach images in comment.

I put this in comments-review.php


And this into functions.php

<?php /* This function attaches the image to the post in the database, add it to functions.php */
function insert_attachment($file_handler,$post_id,$setthumb='false') {
// check to make sure its a successful upload
if ($_FILES[$file_handler]['error'] !== UPLOAD_ERR_OK) __return_false();
require_once(ABSPATH . "wp-admin" . '/includes/image.php');
require_once(ABSPATH . "wp-admin" . '/includes/file.php');
require_once(ABSPATH . "wp-admin" . '/includes/media.php');
$attach_id = media_handle_upload( $file_handler, $post_id );
if ($setthumb) update_post_meta($post_id,'_thumbnail_id',$attach_id);
return $attach_id;
} ?>


And this into comments-listing.php

<?php /* Also in the template file, this script processes any $_POST data and hands off the images to the insert_attachment() function. Again you may want to wrap this in a current_user_can conditional, and probably do some sanity checks on incoming $_POST data. */

global $post;

if ( $_FILES ) {
$files = $_FILES['upload_attachment'];
foreach ($files['name'] as $key => $value) {
if ($files['name'][$key]) {
$file = array(
'name' => $files['name'][$key],
'type' => $files['type'][$key],
'tmp_name' => $files['tmp_name'][$key],
'error' => $files['error'][$key],
'size' => $files['size'][$key]
);

        $_FILES = array("upload_attachment" => $file);

        foreach ($_FILES as $file => $array) {
            $newupload = insert_attachment($file,$post->ID);
        }
    }
}

} ?>


But how to show the images ???

nicleg commented

Great and thank's for sharing.

A question still in my mind.
Why do you use :

        ...
        $_FILES = array("upload_attachment" => $file);

        foreach ($_FILES as $file => $array) {
           $newupload = insert_attachment($file,$post->ID);
        }
        ...

And why (I've tested) just the code below is not enougth ?

        ...
        //$_FILES = array("upload_attachment" => $file);

        //foreach ($_FILES as $file => $array) {
           $newupload = insert_attachment($file,$post->ID);
        //}
        ...

To explain deeper, why do you override $_FILES variable. And why the insert_attachment($file,$post->ID); is inside a foreach ?

Is the first foreach too fast for the insert_attachment ?

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