<script type="text/javascript">
function onclickbutton(value) {
document.getElementByid("clicked").innerHTML = value;
}
</script>
假设此代码用于打印JavaScript函数的结果
<button class="btn btn-primary" data-toggle="modal" data-target="#myModal" onclick="onclickbutton(<?php echo($level->getPotentialEarning()); ?> )">
Recycle
<p id="clicked"></p>
<input type="text" name="amount" value="" readonly>
因为我所有让它作为相同值工作的想法都没有实现
// Gets id of <p>
var test = document.getElementById('test').id;
// Assign test to the input value
$("#test2").val(test);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p id="test"></p>
<input id="test2">