Image basics

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  • swisscheese
    #1

    Image basics

    After reading 5 tutorials, I must be missing something basic.[color=blue]
    >From a .php web page how can I output an image?[/color]
    I created and drew the image and did:

    header("Content-type: image/png");
    imagepng($image ,"image.png" );
    ?>
    ....
    <BODY
    <img src="./image.png" height="400" width="400"></img>

    But I get the broken image icon.
    Also I don't really want to create the file - just output the image
    directly.

    Tags: None
    • swisscheese
      #2
      Re: Image basics

      .... BTW - I don't want to create a separate file for the image code as
      the code calls functions in the rest of the php code.

        Comment

        • Iván Sánchez Ortega
          #3
          Re: Image basics

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          swisscheese wrote:
          [color=blue]
          > imagepng($image ,"image.png" );[/color]
          [color=blue]
          > Also I don't really want to create the file - just output the image
          > directly.[/color]

          <?php
          imagepng($image );
          ?>

          - --
          - ----------------------------------
          Iván Sánchez Ortega -i-punto-sanchez--arroba-mirame-punto-net

          http://acm.asoc.fi.upm.es/~mr/ ; http://acm.asoc.fi.upm.es/~ivan/
          MSN:i_eat_s_p_a _m_for_breakfas t@hotmail.com
          Jabber:ivansanc hez@jabber.org ; ivansanchez@kde talk.net
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            Comment

            • swisscheese
              #4
              Re: Image basics

              Thanks but tried that also.
              And what goes in place of:
              <img src="./image.png" ...

                Comment

                • NC
                  #5
                  Re: Image basics

                  swisscheese wrote:[color=blue]
                  >
                  > After reading 5 tutorials, I must be missing something basic.[/color]

                  The key is to realize that you are going to need TWO scripts:

                  1. The script (or even a static HTML file) containing the image
                  tag. Example: <IMG SRC="image.php" >

                  2. The PHP script posing as image. Be sure that there are no
                  symbols in the script file before the first "<?" or "<?php".

                  This will ensure that the browser will render the output of
                  the script as an image.
                  [color=blue]
                  > Also I don't really want to create the file - just output the image
                  > directly.[/color]

                  You don't have to if you don't want to... In the first script (or an
                  HTML file) you write:

                  <IMG SRC="image.php" >

                  In the image.php, you write:

                  header("Content-type: image/png");
                  // Here's where you actually draw the image...
                  imagepng($im);
                  imagedestroy($i m);

                  Cheers,
                  NC

                    Comment

                    • Iván Sánchez Ortega
                      #6
                      Re: Image basics

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                      swisscheese wrote:
                      [color=blue]
                      > Thanks but tried that also.
                      > And what goes in place of:
                      > <img src="./image.png" ...[/color]

                      <img src='image.php? parameters'/>

                      Where image.php is something like:

                      <?php
                      // init and draw $image
                      imagepng($image );
                      ?>

                      - --
                      - ----------------------------------
                      Iván Sánchez Ortega -i-punto-sanchez--arroba-mirame-punto-net

                      Los experimentos deben ser análogos, todos deben fallar de la misma
                      manera.
                      -- Cuarta Regla de Finagle.

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                        Comment

                        • jimlewis@emachineshop.com
                          #7
                          Re: Image basics

                          I was afraid of that but thanks for confirming it. But the image needs
                          several functions and a lot of data from the other module. Is there a
                          way to call functions across modules?

                            Comment

                            • Oli Filth
                              #8
                              Re: Image basics

                              Note: please don't snip what you're replying to...

                              jimlewis@emachi neshop.com wrote:[color=blue]
                              > I was afraid of that but thanks for confirming it. But the image needs
                              > several functions and a lot of data from the other module. Is there a
                              > way to call functions across modules?[/color]

                              Either sessions or GET variables.

                              e.g. for GET variables, in your main script if you create your HTML as
                              such:

                              <IMG src="image.php? var1=blah">

                              Then in image.php you should have $_GET["var1"] available.

                              --
                              Oli

                                Comment

                                • jimlewis@emachineshop.com
                                  #9
                                  Re: Image basics

                                  Thanks.

                                    Comment

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