... foreach() on line 5

Larucha3000 · Mon May 13, 2013 6:58 pm

I'm reading a book because I want to learn something about php. In chapter 8 teach something about the forms, then I copied and ran the sample code, but it shows an error.
This is the php code, the 'warning' error is at line 8.
I can't see what is happen.. If you ask me I can put here the html code too. Thanks!

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.wc3.org/TR/html4/loóse.dtd">
<html>
<body>
Datos introducidos:
<?php foreach ($_GET as $indice => $valor) {echo "$indice: $valor ";}
echo " GUSTOS: ";
$gustos = $_GET["gustos"];
foreach ( $gustos as $indice => $valor) {
echo "$indice : $valor ";
}

?>
</body>
</html>

pbs · Mon May 13, 2013 7:19 pm

to pass data type in foreach it must be an array, so please pass proper array in foreach on line

Code: Select all

$gustos = $_GET["gustos"];
foreach ($gustos as $indice => $valor) { // code }

Larucha3000 · Mon May 13, 2013 11:48 pm

I can´t understand what you are trying to explain me.

Larucha3000 · Tue May 14, 2013 7:37 am

sandeep605085 · Tue May 14, 2013 12:03 pm

Hi,

Refer the php manual for foreach control structure.
http://php.net/manual/en/control-structures.foreach.php

below is one example:
<?php
foreach (array(1, 2, 3, 4) as &$value) {
$value = $value * 2;
}
?>

So whatever you pass to foreach should be an array or object.

In below your code $_GET["gustos"] should be an array.
$gustos = $_GET["gustos"];
foreach ( $gustos as $indice => $valor) {
echo "$indice : $valor ";
}

you can do gettype($_GET["gustos"]); to check whether its an array or not.
you can do print_r($_GET["gustos"]); to get what are the values of this array.

Thanks,
Sandeep Agrawal
Mindfire Solutions.

johnj · Tue May 14, 2013 4:02 pm

please read and learn about arrays in php, what is an array, how to access elements within an array, how to loop through through the array etc etc

Larucha3000 · Tue May 14, 2013 5:18 pm

Thanks!
I tried these functions and they worked. Finally the code was fine when I put something in parentheses.
Finally was:

$gustos= ( $_GET ["gustos"] );

And the foreach ( ), shows:

0: checkbox 1
1: checkbox 3

While checkbox one and three were checked.

Thanks! I will come again if I found more fails in the book.
A dedicated student.

Larucha3000 · Tue May 14, 2013 5:19 pm

yeah!! That's it.

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