How to print a variable using var_dump in php?

Question

<form>
    Main 
       <select name="main">
               <option value="a">A</option>
               <option value="b">B</option>
               <option value="c">C</option>
               <option value="d">D</option>
       </select>
       <br/>
       <input type="submit" name="submit" value="Order">
</form>

How do I output the user's selected option using var_dump in php? And does $_POST work?

please make the post more a bit cleaner and format the code neat and clean — Oli Soproni B., Apr 22 '15 at 03:05
it is a html form code. i want to ask how to output the option that user chose through php code. Thank you. — Siukinkin C'ck, Apr 22 '15 at 03:17

score 1 · Answer 1 · answered Apr 22 '15 at 03:28

1

Use the Below Code.You have made some mistake like the option values are set wrongly.Inside the form tag it is advisable to use the action and method attribute.

<?php
    if(isset($_POST['submit'])){
        $mainValue = $_POST['main'];//Retrieve the Option Value;
        echo var_dump($mainValue);//Use var_dump
    }
?>

<form method="post">
    Main 
    <select name="main">
        <option value="A">a</option>
        <option value="B">b</option>
        <option value="C"></option>
        <option value="D">d</option>
    </select><br/>
    <input type="submit" name="submit" value="Order">
</form>

answered Apr 22 '15 at 03:28

Pravat Kumar Sahoo

313
2
9

I used your code but it outputs some array type and values. I only want to see the result that user chosen in the form after press the submit. -_-" – Siukinkin C'ck Apr 22 '15 at 03:39
var_dump() function returns the data type and value,so it looks like.Since you want to use var_dump I have written like this. echo $mainValue; to get the submitted value. – Pravat Kumar Sahoo Apr 22 '15 at 03:48
when i press submit, it has no change. – Siukinkin C'ck Apr 22 '15 at 03:55
Inside the if write only $mainValue = $_POST['main'];echo $mainValue; – Pravat Kumar Sahoo Apr 22 '15 at 05:21

score 0 · Answer 2 · answered Apr 22 '15 at 03:30

form action attribute tag means where the form shall be submitted when submit button is press

form method attribute tag means type of server request method being requested

<form action="" method= "POST">
Main <select name="main">
  A <option value = "A">a</option>
  B <option value=="B">b</option>
  C <option value= ="C">c</option>
  D <option value ="D">d</option>
</select>

<br/>

<input type="submit" name="submit" value="Order">
</form>


<?php 

    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        // this will print information about the content of the form
        // being submitted
        var_dump($_POST);
        // or
        echo '<br/>';
        print_r($_POST);

    }

?>

How to print a variable using var_dump in php?

2 Answers2