PHP 接入支付宝即时到账功能

首先请到支付宝那边申请一个及时到账的接口账户，需要提交相关材料申请。然后根据即时到账的API文档进行接入。API文档提供了各种语言版本的demo,我这里是下的php版demo,然后再进行相关修改操作。你也可以将demo版本的代码重新整合，我这里暂时为了走通充值及时到账流程，就不进行代码重构了。

API文档：https://doc.open.alipay.com/docs/doc.htm?spm=a219a.7386797.0.0.eZb8FX&treeId=108&articleId=103950&docType=1

前台表单提交

<form action="/pay/alipayapi.php" class="tm-panel-small uk-form uk-form-stacked" method="post" target="_blank">                               <div class="element" style="margin-top:60px;">                                                                </div>                                                                                    <div class="uk-form-row">                                                                          <div class="uk-form-controls">                                                                            <label for="form-username" class="uk-form-label" style="display:inline-block;padding: 0 10px;vertical-align: middle;margin-left:-20px;">订单序号:</label>          <input class="uk-form-width-large" type="text" name="WIDout_trade_no" id="out_trade_no" value="<?php echo trim($_GET['orderid']);?>" >                   <br>                                                                                 </div>                                                                                    </div>                                                                                    <div class="uk-form-row">                                                                          <div class="uk-form-controls">                                                                            <label for="form-username" class="uk-form-label" style="display:inline-block;padding: 0 10px;vertical-align: middle;margin-left:-20px;">商品名称:</label>          <input class="uk-form-width-large" type="text" name="WIDsubject" value="<?php echo trim($_GET['orderid']);?>" >                               <br>                                                                                 </div>                                                                                    </div>                                                                                    <div class="uk-form-row">                                                                          <div class="uk-form-controls">                                                                            <label for="form-username" class="uk-form-label" style="display:inline-block;padding: 0 10px;vertical-align: middle;margin-left:-20px;">付款金额:</label>          <input class="uk-form-width-large" type="text" name="WIDtotal_fee" value="<?php echo trim($_GET['amt']);?>">                                 <br>                                                                                 </div>                                                                                    </div>                                                                                    <div class="uk-form-row">                                                                          <div class="uk-form-controls">                                                                            <label for="form-username" class="uk-form-label" style="display:inline-block;padding: 0 10px;vertical-align: middle;margin-left:-20px;">商品描述:</label>          <input class="uk-form-width-large" type="text" name="WIDbody" value="订单测试支付">                                             <br>                                                                                 </div>                                                                                    </div>                                                                                   <input type="hidden" name="uid" value="<?php echo $_GET['uid'];?>">                                                     <input type="hidden" name="codes" value="<?php echo $_GET['code'];?>">                                                   <input type="hidden" name="tags" value="<?php echo $_GET['tag'] ?>">                                                     <div class="uk-form-row">                                                                           <input class="uk-button uk-button-primary uk-button-large uk-width-1-1" type="submit" class="alisubmit" value ="确认支付">                      </div>                                                                                   </div>                                                                                   </form>