exchange of var between php and html

krawat

Just a little example

I want to echange between two html forms
with a little php script.

Starting the script above under IE5
with test.pbp?btnSubmit=Start

==> the array $list will be displayed
on the screen

push the button Start1 the list array is corrupt (displays parts of the textstring "Array"

Can anyone help me ?

Thanks

example script test.php

<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>

<body bgcolor="#FFFFFF">
<?php

if ($btnSubmit == "Start")
{
echo "<form name=\"formname\" action =\"test.php\" method=\"post\">";

echo "<input type=hidden name=list value=\"$list\">";
echo "<input type=hidden name=btnSubmit value=\"$btnSubmit\">";

for ($i=1;$i<=10;$i++){$list[$i]= "test" . $i;echo "list[$i]=$list[$i]<br>"; }

echo "<input type=hidden name=list value=\"$list\">";

echo"<input type=\"submit\" name=\"btnSubmit\" value=\"Start1\"> ";

echo "</form>";

}

else if ($btnSubmit == "Start1")

{
echo "<form name=\"formname\" action =\"test.php\" method=\"post\">";

echo "<input type=hidden name=list value=\"$list\">";
echo "<input type=hidden name=btnSubmit value=\"$btnSubmit\">";

for ($i=1;$i<=10;$i++){echo "list[$i]=$list[$i]<br>"; }

echo"<input type=\"submit\" name=\"btnSubmit\" value=\"Start\"> ";

echo "</form>";

}

</body>

[deleted]

you can't print an array linke this:

$myarray=array(1,2,3);

echo $myarray.

It's not possible.

Read the PHP manual about serialize and unserialize.

Anon

First of all, if u use strings, always compare them using
<?
if ( strcmp ( $s1, $s2 ) == 0 )
{
?>
The strings <?echo $s1?> and <?echo $s2?> are equal
<?
} // end if
elseif ( strcasecmp ( $s1, $2 ) == 0 )
{
?>

The strings <?echo $s1?> and <?echo $s2?> are equal, case insensitive

<?
} // end elseif
else
{
?>

The strings are not equal. <?echo $s1?> is <?echo ( strcmp ( $s1, $s2 ) > 0 ? "longer" : "shorter" )?> than <?echo $s2?>

<?
} // end else
?>

Second, if u use php4, the form variables are no longer accessible by their respective names. so u should be referring to btnSubmit
as $HTTP_POST_VARS [ "btnSubmit" ]or $HTTP_GET_VARS [ "btnSubmit" ] for post and get methods respectively

Third,
When trying to print array data, use this way:

blah blah <?echo $t [ $i ]?> yadayada

echo "blah blah " . $t [ $i ] . " yadayada";

instead of

echo "blah blah $t[$i] yadayada"; // this won't work

Last of all:
when walking trough an array, better use foreach rather than for since foreach doesn't use a variable counter, but "walks" through the array step by step:

<?
// this works fine for an associative array:
foreach ( array_keys ( $arr ) as $k )
{
echo "Key ( $k ) holds value " . $arr [ $k ] . "<br>";
}
?>

PS: I use PHP 4, and reading the source code of yours, you are probably using php3, so the second and last point will probably irrelevant. Nevertheless, i suggest u using php4, since it is much more convenient than v3.

good luck! Keep up the good work, anyways

drm

[deleted]

1st: good point.

2nd: Unless you enable register_globals, which will register all form and cookie vars as globals.

3rd: actually in php4 it does work. Wat doesn't work is "$a[$b[1]]"

4th: remember that foreach allways goes through the entire array from front to back. It does not let you go through the array in reverse or sideways.