Combining Variables in PHP

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  • sekdab
    #1

    Combining Variables in PHP

    I am a newbie at PHP and at a loss here. I need to iterate over rows
    in a database, and display them as editable fields in HTML. I can do
    this okay. However, I then need to be able to take a 'snapshot' of
    all changes made and update a DB table with a single "Submit" button.
    Can this be done? Below is a simple example of what I'm trying to do.

    I know it is bad form to try and combine two variables into one, but
    do not know what else to do. I cannot get arrays to work with this.
    The below code will error out with "$color undefined" Any way to
    'combine' two variables as can be done in Korn/Bash?

    Sorry if this sounds confusing, let me know if any more information is
    needed. Thanks for the help!

    <?php
    #------------------------------------
    # Display Form
    #------------------------------------
    echo "<html><bod y>";
    echo "<form method=\"post\" value=\"$PHP_SE LF\">";

    for ($i = 0; $i < 3; $i++) {
    echo "<input type=\"text\" name=\"color${i }\">";
    }

    echo "<input type=\"submit\" name=\"btn\" value=\"Submit\ ">";
    echo "</form></body></html>";
    #------------------------------------
    # Process Form
    #------------------------------------
    if (isset($btn)) {
    echo "You chose:\n";
    echo "${color}{$ i}";
    }
    Tags: None
    • Tony Marston
      #2
      Re: Combining Variables in PHP

      You are getting the "undefined variable" message because you are using
      $variable instead of $_POST['variable']. This is because register_global s is
      now off by default.

      --
      Tony Marston

      Tony Marston's Web Site
      http://www.tonymarston.net
      This is Tony Marston's web site, containing personal information plus pages devoted to the Uniface 4GL development language, XML and XSL, PHP and MySQL, and a bit of COBOL



      "sekdab" <seldan@lore.cc > wrote in message
      news:4b21880f.0 408111051.283ac 98c@posting.goo gle.com...[color=blue]
      >I am a newbie at PHP and at a loss here. I need to iterate over rows
      > in a database, and display them as editable fields in HTML. I can do
      > this okay. However, I then need to be able to take a 'snapshot' of
      > all changes made and update a DB table with a single "Submit" button.
      > Can this be done? Below is a simple example of what I'm trying to do.
      >
      > I know it is bad form to try and combine two variables into one, but
      > do not know what else to do. I cannot get arrays to work with this.
      > The below code will error out with "$color undefined" Any way to
      > 'combine' two variables as can be done in Korn/Bash?
      >
      > Sorry if this sounds confusing, let me know if any more information is
      > needed. Thanks for the help!
      >
      > <?php
      > #------------------------------------
      > # Display Form
      > #------------------------------------
      > echo "<html><bod y>";
      > echo "<form method=\"post\" value=\"$PHP_SE LF\">";
      >
      > for ($i = 0; $i < 3; $i++) {
      > echo "<input type=\"text\" name=\"color${i }\">";
      > }
      >
      > echo "<input type=\"submit\" name=\"btn\" value=\"Submit\ ">";
      > echo "</form></body></html>";
      > #------------------------------------
      > # Process Form
      > #------------------------------------
      > if (isset($btn)) {
      > echo "You chose:\n";
      > echo "${color}{$ i}";
      > }[/color]


        Comment

        • Matthias Esken
          #3
          Re: Combining Variables in PHP

          sekdab wrote:
          [color=blue]
          > Sorry if this sounds confusing, let me know if any more information is
          > needed. Thanks for the help![/color]

          Yes, it is confusing. :-)

          Let's start with a working example with arrays:

          <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
          "http://www.w3.org/TR/html4/loose.dtd">
          <html>
          <body>
          <?php
          #------------------------------------
          # Process Form
          #------------------------------------
          if (isset($_POST['btn'])) {
          foreach ($_POST['color'] as $key => $value) {
          echo "Color $key = $value<br>";
          }
          }

          #------------------------------------
          # Display Form
          #------------------------------------
          echo "<form method='post' value='$_SERVER[PHP_SELF]'>";
          for ($i = 0; $i < 3; $i++) {
          echo "<input type='text' name='color[$i]'>";
          }
          ?>
          <input type='submit' name='btn' value='Submit'>
          </form>
          </body>
          </html>


          Regards,
          Matthias

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