code-boxx/0-JS-CALL-PHP.MD

## 0-JS-CALL-PHP.MD

      
    Raw
  

              0-JS-CALL-PHP.MD
            
          
    CALL PHP SCRIPT IN JAVASCRIPT

https://code-boxx.com/call-php-file-from-javascript/
LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-ajax.html
<!DOCTYPE html>
<html>
  <head>
    <title>AJAX Call PHP</title>
  </head>
  <body>
    <!-- (A) HTML FORM -->
    <form id="myForm" onsubmit="return ajaxcall();">
      <input type="text" name="name" value="Jon" required>
      <input type="email" name="email" value="jon@doe.com" required>
      <input type="submit" value="Save">
    </form>

    <!-- (B) JAVASCRIPT -->
    <script>
    function ajaxcall () {
      // (B1) GET FORM DATA
      var data = new FormData(document.getElementById("myForm"));

      // (B2) AJAX CALL
      var xhr = new XMLHttpRequest();
      xhr.open("POST", "x-dummy.php");
      xhr.onload = function () {
        console.log(this.response);
      };
      xhr.send(data);
      return false;
    }
    </script>
  </body>
</html>

## 2-fetch.html
<!DOCTYPE html>
<html>
  <head>
    <title>Fetch PHP</title>
  </head>
  <body>
    <!-- (A) HTML FORM -->
    <form id="myForm" onsubmit="return fetchcall();">
      <input type="text" name="name" value="Jon" required>
      <input type="email" name="email" value="jon@doe.com" required>
      <input type="submit" value="Save">
    </form>

    <!-- (B) JAVASCRIPT -->
    <script>
    function fetchcall () {
      // (B1) GET FORM DATA
      var data = new FormData(document.getElementById("myForm"));

      // (B2) FETCH
      fetch("x-dummy.php", { method: "POST", body: data })
      .then(res => res.text())
      .then(txt => console.log(txt))
      .catch(err => console.error(err));
      return false;
    }
    </script>
  </body>
</html>

## 3-redirect.php
<!DOCTYPE html>
<html>
  <head>
    <title>Redirection with Query String</title>
  </head>
  <body>
    <!-- (A) HTML FORM -->
    <form onsubmit="return redirect();">
      <input type="number" id="numA" value="123" required>
      <input type="number" id="numB" value="456" required>
      <input type="submit" value="Go!">
    </form>

    <!-- (B) JAVASCRIPT -->
    <script>
    function redirect () {
      // (B1) URL SEARCH PARAMS (QUERY STRING)
      var params = new URLSearchParams();
      params.set("numA", document.getElementById("numA").value);
      params.set("numB", document.getElementById("numB").value);

      // (B2) REDIRECTION
      window.location.href = "3-redirect.php?" + params.toString();
      return false;
    }
    </script>

    <!-- (C) RESULTS -->
    <?php
    if (isset($_GET["numA"])) { require "x-dummy.php"; }
    ?>
  </body>
</html>

## 4-form.php
<!DOCTYPE html>
<html>
  <head>
    <title>NINJA Form Submission</title>
  </head>
  <body>
    <!-- (A) HIDDEN HTML FORM -->
    <form id="ninja" method="post" style="display:none;">
      <input type="hidden" id="numA" name="numA" required>
      <input type="hidden" id="numB" name="numB" required>
    </form>

    <!-- (B) JAVASCRIPT -->
    <input type="button" value="Go!" onclick="go()">
    <script>
    function go () {
      document.getElementById("numA").value = "123";
      document.getElementById("numB").value = "456";
      document.getElementById("ninja").submit();
    }
    </script>

    <!-- (C) RESULTS -->
    <?php
    if (isset($_POST["numA"])) { require "x-dummy.php"; }
    ?>
  </body>
</html>

## 5-unorthodox.html
<!DOCTYPE html>
<html>
  <head>
    <title>Unorthodox - Insert Script Tag</title>
  </head>
  <body>
    <!-- (A) HTML FORM -->
    <form onsubmit="return bad();">
      <input type="number" id="numA" value="123" required>
      <input type="number" id="numB" value="456" required>
      <input type="submit" value="Add">
    </form>

    <!-- (B) JAVASCRIPT -->
    <script>
    function bad () {
      // (B1) URL SEARCH PARAMS (QUERY STRING)
      var params = new URLSearchParams();
      params.set("numA", document.getElementById("numA").value);
      params.set("numB", document.getElementById("numB").value);
      params.set("BAD", 1);

      // (B2) CREATE NEW SCRIPT & INJECT INTO HEAD
      // NOT A GOOD WAY, AND NOT RECOMMENDED.
      var tag = document.createElement("script");
      tag.src = encodeURI("x-dummy.php?" + params.toString());
      document.head.appendChild(tag);
      return false;
    }
    </script>
  </body>
</html>

## x-dummy.php
<?php
if (isset($_GET["BAD"])) {
  $total = $_GET["numA"] + $_GET["numB"];
  echo "alert($total);";
} else {
  print_r($_POST);
  print_r($_GET);
}
	<!DOCTYPE html>
	<html>
	<head>
	<title>AJAX Call PHP</title>
	</head>
	<body>
	<!-- (A) HTML FORM -->
	<form id="myForm" onsubmit="return ajaxcall();">
	<input type="text" name="name" value="Jon" required>
	<input type="email" name="email" value="jon@doe.com" required>
	<input type="submit" value="Save">
	</form>

	<!-- (B) JAVASCRIPT -->
	<script>
	function ajaxcall () {
	// (B1) GET FORM DATA
	var data = new FormData(document.getElementById("myForm"));

	// (B2) AJAX CALL
	var xhr = new XMLHttpRequest();
	xhr.open("POST", "x-dummy.php");
	xhr.onload = function () {
	console.log(this.response);
	};
	xhr.send(data);
	return false;
	}
	</script>
	</body>
	</html>
	<?php
	if (isset($_GET["BAD"])) {
	$total = $_GET["numA"] + $_GET["numB"];
	echo "alert($total);";
	} else {
	print_r($_POST);
	print_r($_GET);
	}