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Languages :: PHP :: just tryin' to pass some value
By: natbha U.S.A.  Date: 11/05/2003 00:00:00  English  Points: 100 Status: Answered
Quality : Excellent
In the code (garbage) below I need the html links (photos, print) to change the directory I'm reading from. It is so easy, why so hard for me?

----------------------------------

<body>

<a href="#" onClick="$imgpath='photos'">photos</a>
<a href="#" onClick="$imgpath='print'">print</a>

<?php
$imgpath = "images";
$handle = opendir( "$imgpath" );

$imgArray = array();

while($file = readdir($handle))
{
if( $file != "." && $file != ".." )
{
print("<a href='work.php?page=$imgpath&image=");
print($file);
print("'> + </a>\n</br>");
if($image == "")
$image = $file;
array_push( $imgArray, $file );
}
}
closedir( $handle );

print( "<img src=\"$imgpath/" . $image . "\">" );
?>

</body>
By: VGR Date: 11/05/2003 18:42:00 English  Type : Comment
because either you've register_globals=Off or don't use proper coding.

For instance in HTML
<a href="#" onClick="$imgpath='photos'">photos</a>
won't work at all, except if this is (it doesn't seem to be) in an echo <<<EOS...EOS; block

is this script named 'work.php' ?

if yes, then write it this way :

<body>

<?php
echo <<<EOS
<a href="#" onClick="$imgpath='photos'">photos</a>
<a href="#" onClick="$imgpath='print'">print</a>
EOS;

// get the data eventually transmitted by your links below
if (isset($_GET['imgpath'])) $imgpath=$_GET['imgpath'];
if (isset($_GET['image'])) $image=$_GET['image'];

//VGR11052003 MODified your code so that you don't crush transmitted value with default one
if (!isset($imgpath)) $imgpath = "images";

// resume normal code (didn't change anything to it)
$handle = opendir( "$imgpath" );

$imgArray = array();

while($file = readdir($handle))
{
if( $file != "." && $file != ".." )
{
print("<a href='work.php?page=$imgpath&image=");
print($file);
print("'> + </a>\n</br>");
if($image == "")
$image = $file;
array_push( $imgArray, $file );
}
}
closedir( $handle );

print( "<img src=\"$imgpath/" . $image . "\">" );
?>

</body>
By: natbha Date: 11/05/2003 19:22:00 English  Type : Comment
Maybe the onClick isn't the best way to change the $imgpath value because that didn't work for me.

If you have a suggestion, someway to use the $_GET in another way, maybe that would work.

oh, and to note, the file is called work.php.
By: VGR Date: 11/05/2003 20:01:00 English  Type : Comment
ok : what exactly do you try to achieve ?

the link with page=$imgpath&image=");
is a bit weird, no ? Is "page" supposed to be the "new path" ? And what do you mean by "change the directory I'm reading from" ?
By: VGR Date: 11/05/2003 20:05:00 English  Type : Comment
I think you try to make an output of all images present in directories, navigate through directories etc but this isn't the way I would have done it.
By: natbha Date: 11/05/2003 20:47:00 English  Type : Comment
I am trying to output links to images in certain directories. I was thinking, maybe I could use something like

$_POST(index.php) $imgpath = "dirName";

But I don't know if that'd work, and I can't find any documentation that I understand for PHP.

For all your help, I'm increasing the points to 100

thanks,
nat
By: VGR Date: 11/05/2003 21:39:00 English  Type : Answer
ok ok ok well you're on the right track. Let me see.

first I would build links to images via "normal" URIs, not with parameters (after all they are accessible) and build only links with ?newpath= for directories. Thus I would use is_dir() on $file in your loop, inside the test "not . nor .."

then perhaps you'll find enlightning those scripts I "made" (fixed) for other people :

1) this lists files having .htm extensions
<?php

// set this constant
$directories=array('.'); //,'./subdir1');

// now proceed
for ($i=0;$i<count($directories);$i++) {
$directory = $directories[$i];
if($dir_handle = opendir($directory)) {
while($file = readdir($dir_handle))
if (! is_dir($file)) // candidate ok : file
if (($file <> '.') AND ($file <> '..')) { // file OK
// check extension
if ($a=strpos($file,'.htm')) { // takes also .html but also .htm.old for example
} // else NOP, file ignored
} // if file OK
closedir($dir_handle);
} // if dir opened OK
} // for $i
?>

2) this more complex lists all files and enables to navigate up and down through directories.
<?php

$DEBUG=FALSE;

if (isset($_GET['nextdir'])) $nextdir = $_GET['nextdir'];

if (isset($_GET['userdir'])) $userdir = $_GET['userdir']; // for the first time only (session var afterwards)
// delete the above line if the $userdir may be known as a session var since the beginning of the script (better security)

if (!isset($nextdir)) $nextdir='/'; else $nextdir = urldecode($nextdir);

// GIVEN : $userdir (=user name) is somewhat transmitted, via a session variable usually.
session_start();
if (!isset($_SESSION['userdir'])) $_SESSION['userdir']=$_GET['userdir']; // first time it's in the URL...

function nextdiris($path,$file) {
GLOBAL $DEBUG;
if ($file=='..') { // let's work
if (($path=="")or($path=='/')) $poubStr='/';
else {
if ($DEBUG) echo ".. for path='$path'
";
//let's get over up level
$zar=explode('/',$path);
$j=count($zar)-1;
while ($zar[$j]=="") $j--;
$zar[$j]=""; // empty last component
// no because array count stays unchanged... $poubStr=implode('/',$zar);
$poubStr=$zar[0]; // can not be empty unless path was empty itself
for ($j=1;$j<count($zar);$j++) if ($zar[$j]<>"") $poubStr.='/'.$zar[$j];
if ($DEBUG) echo ".. for path : result '$poubStr'
";
} // if already at the top
} else $poubStr=(($path=='/')?$file:$path.'/'.$file);
return urlencode($poubStr);
} // nextdiris String Function

// dir to open ############################################################################################

$rootdir ='i:/www'; // no trailing slash // "d:/website_development/root";
$userrootdir = $rootdir.'/'.$userdir;
if ($DEBUG) echo "userrootdir='$userrootdir'
";

if (($nextdir=='/')or($nextdir=="")) {
$diropen=$userrootdir;
$curdir=$userdir;
} else {
$diropen=$userrootdir.'/'.$nextdir;
$curdir=$userdir.$nextdir;
} // selon le cas


if ($DEBUG) echo "diropen= '$diropen'
";
if ($DEBUG) echo "curdir= '$curdir'
";

// end of dir to open ######################################################################################

// set strings ################
$total=0;
$nbdir=0;
$nbfile=0;
$fdtotal=0;
// Open and read directory ###################################################################

//////////////////////////// html stuff normally
//VGR12042003 ADDed this for test display
echo "<TABLE>";

if ($handle = opendir($diropen)) { //VGR12042003 FIXed unnecessary quotes
while ($file = readdir($handle)) { //VGR12042003 FIXed (removed) silly "false !== "
if ($file != ".") { //VGR12042003 FIX parenthesing and chose clearer Boolean operator, FIXed indenting, ADDed .. case
if (!( ($file=='..') AND ($nextdir=='/') )) {
$checkdir = $diropen.'/'.$file;
$isdir = is_dir($checkdir);
// File or directory listing column ################################################################

//////////////////////////// html stuff normally
//VGR12042003 ADDed this for test display
echo "<TR><td>";

if ($isdir){
$a=nextdiris($nextdir,$file);
if ($a<>'%2F') echo "&nbsp;&nbsp;<a href='$SCRIPT_NAME?nextdir=$a'><font color=red>".(($file != "..")?$file:'UP')."</font></a></b>"; //VGR12042003 ADDed colour to better test directories found
echo "</font></font></td>";
} else {
//if ($DEBUG) echo "file '$file' : curdir= '$curdir'
";

echo "&nbsp;&nbsp;<a href='/$curdir/$file'>$file</a></b>";
echo "</font></font></td>";
}

// File or directory size ######################################################################
echo "<td height='20' width='200' align='right'>";
echo "<font face='Arial, Helvetica, sans-serif'><font size='1'>";
$openfilesize = $diropen.'/'.$file;
$fsize = filesize($openfilesize);
if (($fsize =='0') AND (! $isdir)) { //ditto on test
echo "0 bytes";
} else if($isdir) { // ditto on ==1
if ($a<>'%2F') echo "<b><u>Directory</u></b>";
} else {
echo "".round($fsize/1.024)." bytes";
} // if isdir
if ($isdir) $nbdir++; // ditto on ==1
$total += $fsize;
if (! $isdir) $nbfile++; // ditto on ==0
$fdtotal++;
} // if fsize and isdir
echo "</font></font></td>";
} // if not current root and ..
} // if not .
//VGR12042003 ADDed this for test display
echo "</tr>";
} // while
//VGR12042003 ADDed this for test display
echo "</TABLE>";
?>
By: natbha Date: 19/05/2003 07:21:00 English  Type : Comment
so, I didn't really use the code,b ut I like it, so I'll give ya the points. Thanks!

nat

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