我想在其他文本字段值中添加 html 文本字段值将更改

Question

我想在其他文本字段值更改期间在 HTML 文本字段中设置 PHP 变量。<input type="text" class="form-control" name="refrence" id="refrence" onkeydown="myFunction(event)"          placeholder="Reference" autocomplete="off">脚本   <script>          function myFunction(event) {           var x = event.keyCode;             if (x == 17) {                 var name = document.getElementById("companyName");               var address = document.getElementById("address");               alert("df");               name.value = "<?php echo $invoiceValues['order_receiver_name']; ?                              >;                address.value = "<?php echo invoiceValues['order_receiver_address']; ?>;               }            }  </script>php代码public function getrefer() {   $sqlQuery = "SELECT * FROM " . $this->invoicevendortable                  . " WHERE reference = '" . $_SESSION['refrence'] . "'";   return $this->getData($sqlQuery);}

Answer 1

需要通过JS读取当前值；PHP 仅在页面加载时被解析！

var refDomElement = document.querySelector( '#reference' )

    , useDomElement = document.querySelector( '#companySomething' )

useDomElement.value = refDomElement.value