Difference between revisions of "CSC220 UploadImages.php"

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(Created page with '--~~~~ ---- <code><pre> <?php // uploadimage.php // D. Thiebaut // // a Php program to upload images. // The images are stored in a directory ./images that is // read…')
 
 
Line 73: Line 73:
 
function displayArrays() {
 
function displayArrays() {
 
   print "<P><P><table bgcolor=\"#6699cc\"><tr><td>";
 
   print "<P><P><table bgcolor=\"#6699cc\"><tr><td>";
−
   print "<P>Session = <PRE>";
+
   print "<P>Session = &lt;PRE>";
 
   print_r( $_SESSION );
 
   print_r( $_SESSION );
 
   print "</td></tr>";
 
   print "</td></tr>";
  
−
   print "<tr><td><P>REQUEST = <PRE>";
+
   print "<tr><td><P>REQUEST = &lt;PRE>";
 
   print_r( $_FILES );
 
   print_r( $_FILES );
 
   print "</td></tr>";
 
   print "</td></tr>";
  
−
   print "<tr><td><P>REQUEST = <PRE>";
+
   print "<tr><td><P>REQUEST = &lt;PRE>";
 
   print_r( $_REQUEST );
 
   print_r( $_REQUEST );
 
   print "</td></tr>";
 
   print "</td></tr>";
  
  
−
   print "</table></PRE><P>\n";
+
   print "</table>&lt;/PRE><P>\n";
 
}
 
}
  

Latest revision as of 19:32, 31 October 2010

--D. Thiebaut 00:29, 1 November 2010 (UTC) 

<?php
  // uploadimage.php
  // D. Thiebaut
  //
  // a Php program to upload images.
  // The images are stored in a directory ./images that is
  // read/write accessible by all.
  //
  // program states:
  //
  // (S0) display form
  //  |
  //  |
  //  V
  // (S1) display result of upload
  //  | 
  //  |
  //  V
  // (S3) display all images
  //

session_start(); // to keep track of the phases

//-----------------------------------------------------------------------------
//                            G L O B A L S
//-----------------------------------------------------------------------------
$DIR = "./images/";   // the directory where the pics are stored

//-----------------------------------------------------------------------------
// openPage: opens the html tags and display the menu
//-----------------------------------------------------------------------------
function openPage() {
    ?>
    <html>
    <head>
    <title>Upload Image</title>
    <meta http-equiv="Pragma" content="no-cache">
    </head>
    <body>
    <?php
    printf( "(<a href=\"%s\">Source</a>)", str_ireplace( ".php", ".txt", $_SERVER[ 'PHP_SELF' ] ));
    print "<P><center>\n";
    print "<a href=\"$thisPage?phase=one\">Upload Pics</a> |\n";
    print "<a href=\"$thisPage?phase=three\">Show All Pics</a>\n";
    print "</center>\n";
    print "<P>";

}

//-----------------------------------------------------------------------------
// closePage: display the menu and closes the html tags
//-----------------------------------------------------------------------------
function closePage() {
    $thisPage = $_SERVER[ 'PHP_SELF'];
    print "<center>\n";
    print "<a href=\"$thisPage?phase=one\">Upload Pics</a> |\n";
    print "<a href=\"$thisPage?phase=three\">Show All Pics</a>\n";
    print "</center>\n";
    //displaySession();
    ?>
    </body>
    </html>

    <?php
}

//-----------------------------------------------------------------------------
// displayArrays: debugging function
//-----------------------------------------------------------------------------
function displayArrays() {
  print "<P><P><table bgcolor=\"#6699cc\"><tr><td>";
  print "<P>Session = <PRE>";
  print_r( $_SESSION );
  print "</td></tr>";

  print "<tr><td><P>REQUEST = <PRE>";
  print_r( $_FILES );
  print "</td></tr>";

  print "<tr><td><P>REQUEST = <PRE>";
  print_r( $_REQUEST );
  print "</td></tr>";


  print "</table></PRE><P>\n";
}

//-----------------------------------------------------------------------------
// Phase1: displays the upload form
//-----------------------------------------------------------------------------
function phase1() {
    ?>
    <h1>Upload Images</h1>
    <P><P><P><P>

      <form action="<?php echo $_SERVER['PHP_SELF']; ?>?phase=two" 
            method="POST" enctype="multipart/form-data">
      <input type="hidden" name="MAX_FILE_SIZE" value="125000"> 
      Upload Image: <input type="file" name="imgfile">
      <input type="submit" value="Upload Image">
      </form>
   <?php

   $SESSION[ 'phase' ] = "two"; // to report status of upload
}

//-----------------------------------------------------------------------------
// Phase2: reports on status of upload and display picture
//-----------------------------------------------------------------------------
function phase2() {

    global $DIR;

    print "<h1>Upload Status</h1>\n";
    print "<P><P><P><P>";

    if ( empty( $_FILES[ 'imgfile' ] ) ) {
      print "<font color=\"#ff0000\"><h2>Error uploading image</h2></font>";
      return;
    }

    //--- get the image information from the global $_FILES array ---
    $fileName = basename( $_FILES[ 'imgfile' ][ 'name' ] );
    $fileType = $_FILES[ 'imgfile' ][ 'type' ];
    $tempName = $_FILES[ 'imgfile' ][ 'tmp_name' ];
    $error    = $_FILES[ 'imgfile' ][ 'error' ];
    $fileSize = $_FILES[ 'imgfile' ][ 'size' ];

    //--- create the two image file names for the original and thumbnail ---
    $destFileName = $DIR . $fileName;

    //--- move temp file to our directory ---
    $result = move_uploaded_file( $tempName, $destFileName);

    //--- error? ---
    if( empty($result) ) {
      print(  "<font color=\"#ff0000\"><h2>Error moving the uploaded file.</h2></font>" );
      return;
    }

    //--- display file ---
    print( "<P><img src=\"$destFileName\">" );

}

//-----------------------------------------------------------------------------
// phase3: display all the pics in the directory (just the images)
//-----------------------------------------------------------------------------
function phase3() {
    global $DIR;

    //--- open the directory ---
    $dir_handle = opendir( $DIR ) or die("Unable to open $DIR");

    //--- get all the files that are thumbnails ---
    $files = array();
    while ( ($file = readdir($dir_handle)) !== false ) {
      if ( $file != "." && $file != ".." )
        $files[] = $DIR . $file;
    }
    
    //--- close the directory
    closedir($dir_handle);

    //--- display the pics ---
    print "<h1>All Uploaded Pictures</h1>\n";
    print "<P><P><P><P><table>\n";
    foreach ( $files as $file ) 
       print "<tr><td><img src=\"$file\"></td><td>$file</td></tr>\n"; 
    print "</table>\n";
}


//--------------------------------------------------------
//                  M A I N    P R O G R A M
//--------------------------------------------------------
openPage();
if ( empty( $_SESSION[ 'phase' ] ) ) {
    //print "<P>SESSION[phase] empty";
    $phase = "one";
}
else {
    //print "<P>Getting phase from SESSION";
    $phase = $_SESSION[ "phase" ];
}
if ( !empty( $_REQUEST[ 'phase' ] ) ) {
    //print "<P>Cetting phase from REQUEST";
    $phase = $_REQUEST[ "phase" ];
}


switch ( $phase ) {
    case "one": 
        //---------------------------------------------------
        //  P H A S E   #1: upload image
        //---------------------------------------------------
        phase1();
        $_SESSION[ 'phase' ] = "two";
        break;

    case "two": 
        //---------------------------------------------------
        //  P H A S E   #2: report status of upload
        //---------------------------------------------------
        phase2();
        $_SESSION[ 'phase' ] = "one";
        break;

    case "three": 
        //---------------------------------------------------
        //  P H A S E   #3: display all the uploaded pics
        //---------------------------------------------------
        phase3();
        $_SESSION[ 'phase' ] = "one";
        break;

    default:
        print "<h3><font color=\"#ff000\">Error in phase initialization</font></h3>\n";

}

closePage();
?>










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