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text field values to php variable.......

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text field values to php variable.......

Jun 19th, 2007

This is probably a stupid question, but I am new to this stuff and need some help. I have a form with a text box and a submit button, and I want to pass the user-entered contents of the text box to a php variable ($size) when the user clicks the submit button. how do i do this??? any help is greatly appreciated. i can post my code if you think that will help just ask me.

Henry Phillips
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Adirondack Area Network, LLC

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Re: text field values to php variable.......

Jun 20th, 2007

Use $_POST['fieldname']

You said you're a beginner, so I wrote a very short description on how the whole process works. You may already be familiar with the basics of forms, but if not, read on. Don't be afraid to do Google searches, either. Remember, you're a web developer, your browser should be already RUNNING. (-:

Take this code snippet: (Which is not guaranteed to be error free, it's for example purposes only.)

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
<form action="example.php" method="POST">
<input type="text" name="input_value">
<input type="submit" name="submit">
 
<?php
if (isset($_POST['submit']))
  {
  // Execute this code if the submit button is pressed.
  $formvalue = $_POST['input_value'];
  }
?>
<form action="example.php" method="POST">
<input type="text" name="input_value">
<input type="submit" name="submit">

<?php
if (isset($_POST['submit']))
  {
  // Execute this code if the submit button is pressed.
  $formvalue = $_POST['input_value'];
  }
?>

The first several lines are a simple basic input form. We're passing variables by the POST method, which keeps them from being appended to the URL on submit. (There's also GET)

When the user clicks on "Submit" (or "Submit Query" because I didn't give the button a label), the browser will load the file indicated by action=, which for the sake of this example is the one with the form.

The script will then start executing at the if (isset($_POST['submit'])) line, as the submit button was pressed. To access form values, you'd use $_POST['name'].

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Re: text field values to php variable.......

Jun 20th, 2007

thank you this was very helpful.

Henry Phillips
Web Programmer
Adirondack Area Network, LLC

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mkmirza92

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U May Write this by writing Code in two Files

Jun 3rd, 2009

index.html

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 html Syntax (Toggle Plain Text) 
<html>
<body>
<form action="page.php" method="post">
<input type="text" name="fname" />
<input type="text" name="age" />
<input type="Submit" name="Submit">
</form>
</body>
</html>
<html>
<body>
<form action="page.php" method="post">
<input type="text" name="fname" />
<input type="text" name="age" />
<input type="Submit" name="Submit">
</form>
</body>
</html>

Page.php

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 php Syntax (Toggle Plain Text) 
<html>
<body>
<?php $name = $_POST["fname"]; ?>
<?php $age = $_POST["age"]; ?> 
Welcome <?php echo $name; ?><br />
You are <?php echo $age; ?>
 
</body>
</html>
<html>
<body>
<?php $name = $_POST["fname"]; ?>
<?php $age = $_POST["age"]; ?> 
Welcome <?php echo $name; ?><br />
You are <?php echo $age; ?>

</body>
</html>

Last edited by peter_budo; Jun 3rd, 2009 at 1:27 pm. Reason: Keep It Organized - For easy readability, always wrap programming code within posts in [code] (code blocks) and [icode] (inline code) tags.