javascript - Send POST data to PHP without using an HTML form?

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javascript - Send POST data to PHP without using an HTML form?

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

Is there anyway to send post data to a php script other than having a form? (Not using GET of course).

I want javascript to reload the page after X seconds and post some data to the page at the same time. I could do it with GET but I would rather use POST, as it looks cleaner.

Thanks a lot.

EDIT: Would it be possible to do with PHP header? I'm sure it is better to use JQuery but for my current situation I could implement that a lot easier/faster : )

Cheers

I ended up doing it like so:

<script>
  function mySubmit() {
    var form = document.forms.myForm;
    form.submit();
  }
</script>

...

<body onLoad="mySubmit()";>
  <form action="script.php?GET_Value=<?php echo $GET_var ?>" name="myForm" method="post">
    <input type="hidden" name="POST_Value" value="<?php echo $POST_Var ?>">
  </form>
</body>

Seems to work fine for me, but please say if there is anything wrong with it!

Thanks everyone.

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1 Answer

深蓝 · Answer 1 · 2021-10-17T02:50:07+0000

As requested above, here is how you could dynamically add a hidden form and submit it when you want to refresh the page.

Somewhere in your HTML:

<div id="hidden_form_container" style="display:none;"></div>

And some Javascript:

function postRefreshPage () {
  var theForm, newInput1, newInput2;
  // Start by creating a <form>
  theForm = document.createElement('form');
  theForm.action = 'somepage.php';
  theForm.method = 'post';
  // Next create the <input>s in the form and give them names and values
  newInput1 = document.createElement('input');
  newInput1.type = 'hidden';
  newInput1.name = 'input_1';
  newInput1.value = 'value 1';
  newInput2 = document.createElement('input');
  newInput2.type = 'hidden';
  newInput2.name = 'input_2';
  newInput2.value = 'value 2';
  // Now put everything together...
  theForm.appendChild(newInput1);
  theForm.appendChild(newInput2);
  // ...and it to the DOM...
  document.getElementById('hidden_form_container').appendChild(theForm);
  // ...and submit it
  theForm.submit();
}

This is equivalent to submitting this HTML form:

<form action="somepage.php" method="post">
  <input type="hidden" name="input_1" value="value 1" />
  <input type="hidden" name="input_2" value="value 2" />
</form>

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