upload image in ajax php script code example

Example 1: upload image ajax demo

$(document).ready(function(){

    $("#but_upload").click(function(){

        var fd = new FormData();
        var files = $('#file')[0].files[0];
        fd.append('file',files);

        $.ajax({
            url: 'upload.php',
            type: 'post',
            data: fd,
            contentType: false,
            processData: false,
            success: function(response){
                if(response != 0){
                    $("#img").attr("src",response); 
                    $(".preview img").show(); // Display image element
                }else{
                    alert('file not uploaded');
                }
            },
        });
    });
});

Example 2: file upload in php through ajax

<?
$data = array();
    //check with your logic
    if (isset($_FILES)) {
        $error = false;
        $files = array();

        $uploaddir = $target_dir;
        foreach ($_FILES as $file) {
            if (move_uploaded_file($file['tmp_name'], $uploaddir . basename( $file['name']))) {
                $files[] = $uploaddir . $file['name'];
            } else {
                $error = true;
            }
        }
        $data = ($error) ? array('error' => 'There was an error uploading your files') : array('files' => $files);
    } else {
        $data = array('success' => 'NO FILES ARE SENT','formData' => $_REQUEST);
    }

    echo json_encode($data);
?>