image upload in WordPress admin option page not working - wordpress

Question

i working on plugin that has in back-end to add url of of site or post and short description and in front end show then in a widget,i have button for small image of post to be uploaded but it didi't work out but same code work fine in normal php...
$upload_errors = array(
// http://www.php.net/manual/en/features.file-upload.errors.php
UPLOAD_ERR_OK => "No errors.",
UPLOAD_ERR_INI_SIZE => "Larger than upload_max_filesize.",
UPLOAD_ERR_FORM_SIZE => "Larger than form MAX_FILE_SIZE.",
UPLOAD_ERR_PARTIAL => "Partial upload.",
UPLOAD_ERR_NO_FILE => "No file.",
UPLOAD_ERR_NO_TMP_DIR => "No temporary directory.",
UPLOAD_ERR_CANT_WRITE => "Can't write to disk.",
UPLOAD_ERR_EXTENSION => "File upload stopped by extension."
);
// process the form data
$tmp_file = $_FILES['file_upload']['tmp_name'];
$target_file = basename($_FILES['file_upload']['name']);
$upload_dir = "uploads";
// You will probably want to first use file_exists() to make sure
// there isn't already a file by the same name.
// move_uploaded_file will return false if $tmp_file is not a valid upload file
// or if it cannot be moved for any other reason
if(move_uploaded_file($tmp_file, $upload_dir."/".$target_file)) {
$message = "File uploaded successfully.";
} else {
$error = $_FILES['file_upload']['error'];
$message = $upload_errors[$error];
}
this is the form used to upload image
<form action='' method='post' name="text_form" onsubmit="return Blank_TextField_Validator()" enctype="multipart/form-data">
<table class='form-table'><tr valign='top'>
<th scope='row'><lable for='new_Directory_name'>Enter the Title:</lable></th>
<td><input type='text' id='newtextchange' name='newtextchange' size="100" /></br></td>
</tr>
<tr>
<th scope='row'><lable for='new_Directory_name'>Enter the Description:</lable></th>
<td><textarea rows="4" cols="50" name='textarea1'>
</textarea></br></td>
</tr>
<tr>
<th scope='row'><lable for='new_Directory_name'>Enter the URL:</lable></th>
<td><input type='text' id='newtextchange1' name='newtextchange1' size="100" /></br></td>
</tr>
<tr>
<th scope='row'><lable for='new_Directory_name'>Upload image:</lable></th>
<td> <input type="hidden" name="MAX_FILE_SIZE" value="1000000" /><input type="file" name="file_upload" /><br><br><input id='addtobow' class='button-secondary action' type='submit' value='Add to Best of web' name='submit'/></td>
</tr>
</table>
</form>

Answer 1

You should look at wp_handle_upload for this one.
The example given there is very usefull.
To save the url you can use the following lines:
$upload_overrides = array( 'test_form' => false );
$source = wp_handle_upload( $_FILES['file'], $upload_overrides );
if ( $source )
$input = serialize( $source );
Hope it helps!

Answer 2

problem is with the file upload url and this is how i fix it..,now it is working fine...
$tmp_file = $_FILES['file_upload']['tmp_name'];
$target_file = basename($_FILES['file_upload']['name']);
//$upload_dir = "D:\softwares_installed\wamp\www\wordpress\wp-content\plugins\bestofweb\uploads";
$upload_dir =ABSPATH . "wp-content/plugins/bestofweb/uploads";
$up_urlp1="/wp-content/plugins/bestofweb/uploads";
// You will probably want to first use file_exists() to make sure
// there isn't already a file by the same name.
// move_uploaded_file will return false if $tmp_file is not a valid upload file
// or if it cannot be moved for any other reason
if(move_uploaded_file($tmp_file, $upload_dir."/".$target_file)) {
//$message = "File uploaded successfully.";
//echo $upload_dir."/".$target_file;
//echo bloginfo('wpurl');
$up_url= $up_urlp1."/".$target_file;
//echo $up_url;
//if($message == "File uploaded successfully.")
// {
// $imgpath=$upload_dir.
// }
} else {
$error = $_FILES['file_upload']['error'];
// $message = $upload_errors[$error];
}