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Posted by The Eclectic Electric on 08/03/06 19:08
I'm a noob to PHP and by way of teaching myself I thought I'd make an
application that I could actually use. It's very simple - a page reads a
shopping list from a file (if it exists) and accepts new items as well. The
information is passed to a new page and parsed into a usable shopping list
that can be printed off. Two items are passed - an array built from a
SELECT MULTIPLE (this all works fine) and what I thought would be an array,
but turns out to be a string (I now understand why), built from a TEXTAREA.
I've been very diligently working my way through every noobish problem that
I've come across, searching forums and re-reading code a hundred times
before having a "D'OH" moment (e.g. forgetting to put a $ on the front of a
variable I referenced). I've now hit a brick wall.
My initial code "works" in terms of file i/o (as what I thought was the
first element of the array contains carriage returns and new line
characters), but on the screen the "additional" items are displayed as one
item. To get around this issue, I attempted to explode the "additional"
form element and then my original code (which expected this to be an array)
should have worked fine. BUT IT DOESN'T. In fact, when I explode the
contents of $_GET['additional', either directly or by passing to a string
first, it comes out as "Array". Most frustrating of all is that I can still
see it in the URL bar! I don't understand what's going on! Aaaaargh!
I'll put the form and the whole of the page at the bottom for reference, but
the pertinent parts of the code are here. Any help would be GREATLY
appreciated!
+e
****
This puts the contents of 'additional' on screen and writes them to file
****
IF ( array_key_exists( 'additional', $_GET ) )
{
$additional_array = $_GET['additional'];
@ $fnum = fopen("$docroot/shoplist.txt",'a+');
IF ( !$fnum )
{
ECHO 'Ooh, eck! It\'s all gone tits up </BR>';
}
ELSE
{
$loop_limiter = ( count($additional_array) );
FOR ( $looper = 0; $looper < $loop_limiter; $looper++ )
{
ECHO '[ ] '.$additional_array[$looper].'</BR>';
$writeline = $additional_array[$looper]."\n";
IF ( $looper = 0 )
{
$writeline = "\r\n".$writeline;
}
FWRITE ($fnum, $writeline, strlen($writeline));
}
FCLOSE($fnum);
}
}
****
Trying to fix this, the code success goes backwards - this puts "Array" on
screen and writes the same to file
****
IF ( array_key_exists( 'additional', $_GET ) )
{
$get_string = $_GET['additional'];
@ $fnum = fopen("$docroot/shoplist.txt",'a+');
IF ( !$fnum )
{
ECHO 'Ooh, eck! It\'s all gone tits up </BR>';
}
ELSE
{
$additional_array = explode( "\r\n", $get_string );
// This does the same -
// $additional_array = explode( "\r\n", $_GET['additional'] );
$loop_limiter = ( count($additional_array) );
FOR ( $looper = 0; $looper < $loop_limiter; $looper++ )
{
ECHO '[ ] '.$additional_array[$looper].'</BR>';
$writeline = $additional_array[$looper]."\n";
IF ( $looper = 0 )
{
$writeline = "\r\n".$writeline;
}
FWRITE ($fnum, $writeline, strlen($writeline));
}
FCLOSE($fnum);
}
}
****
The original form page - shoplist.php:
****
<HTML>
<HEAD>
<title>Mr Cakey's Shopping List Generator</title>
</HEAD>
<BODY>
<FORM ACTION="shoplist_create.php" METHOD="GET">
<?php
$docroot = $_SERVER['DOCUMENT_ROOT'];
@ $fnum = fopen("$docroot/shoplist.txt",'r');
IF ( ! $fnum )
{
ECHO 'No previous items detected.</BR>';
}
ELSE
{
ECHO '<P>Previously selected items:</P>';
ECHO '<SELECT NAME="existing[]" SIZE=20 MULTIPLE="yes">';
WHILE ( ! feof($fnum) )
{
$line = fgets($fnum, 41);
ECHO '<OPTION>'.$line.'</OPTION>';
}
FCLOSE($fnum);
ECHO '</SELECT>';
}
?>
<P>Enter additional items here (one per line):</P>
<TEXTAREA NAME="additional[]" COLS=40 ROWS=10></TEXTAREA>
<INPUT TYPE="submit" VALUE="Create shopping list">
</FORM>
</BODY>
</HTML>
****
The list parser - shoplist_create.php:
****
<HTML>
<HEAD>
<title>Your Shopping List</title>
</HEAD>
<BODY>
<H1>Your shopping list</H1>
<?php
$docroot = $_SERVER['DOCUMENT_ROOT'];
IF ( array_key_exists( 'existing', $_GET ) )
{
$existing_array = $_GET['existing'];
$loop_limiter = ( count($existing_array) );
FOR ( $looper = 0; $looper < $loop_limiter; $looper++ )
{
ECHO '[ ] '.$existing_array[$looper].'</BR>';
}
}
IF ( array_key_exists( 'additional', $_GET ) )
{
// This gets the contents of 'additional' fine
$additional_array = $_GET['additional'];
// This is used to feed the explode further down
// $get_string = $_GET['additional'];
@ $fnum = fopen("$docroot/shoplist.txt",'a+');
IF ( !$fnum )
{
ECHO 'Ooh, eck! It\'s all gone tits up </BR>';
}
ELSE
{
// This doesn't work ($get_string= line uncommented)
// $additional_array = explode( "\r\n", $get_string );
// Nor does this (")
// $additional_array = explode( "\r\n", $_GET['additional'] );
// But commenting both results in the correct information being written to
the file and to the contents of $additional_array being echoed to the screen
$loop_limiter = ( count($additional_array) );
FOR ( $looper = 0; $looper < $loop_limiter; $looper++ )
{
ECHO '[ ] '.$additional_array[$looper].'</BR>';
$writeline = $additional_array[$looper]."\n";
IF ( $looper = 0 )
{
$writeline = "\r\n".$writeline;
}
FWRITE ($fnum, $writeline, strlen($writeline));
}
FCLOSE($fnum);
}
}
IF ( !(isset($existing_array)) && !(isset($additional_array))
)
{
ECHO 'Your shopping list was empty. Do you grow your own?';
}
?>
</BODY>
</HTML>
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