How to get rid of warnings?

[Lenard Redwood]

I have the maximum number of warnings during PHP development. How can I
get rid of these warnings without turning them off in PHP?

Here's the code I have:

<form method="POST" action="eat.php">
<select name="lunch[ ]" multiple>
<option value="pork">BBQ Pork Bun</option>
<option value="chicken">Chicken Bun</option>
<option value="lotus">Lotus Seed Bun</option>
<option value="bean">Bean Paste Bun</option>
<option value="nest">Bird-Nest Bun</option>
</select>
<input type="submit" name="submit">
</form>

Selected buns: <br/>
<?php
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br/>";
}
?>
And I get: Warning: Invalid argument supplied for foreach() in
C:\lighttpd\htdocs\index.php on line 17

Is there a way to give the 'lunch' variable a default value if
undefined?
Thank you.

[Jerry Stuckle]

Lenard Redwood wrote:

I have the maximum number of warnings during PHP development. How can I
get rid of these warnings without turning them off in PHP?

Here's the code I have:

<form method="POST" action="eat.php">
<select name="lunch[ ]" multiple>
<option value="pork">BBQ Pork Bun</option>
<option value="chicken">Chicken Bun</option>
<option value="lotus">Lotus Seed Bun</option>
<option value="bean">Bean Paste Bun</option>
<option value="nest">Bird-Nest Bun</option>
</select>
<input type="submit" name="submit">
</form>

Selected buns: <br/>
<?php
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br/>";
}
?>
And I get: Warning: Invalid argument supplied for foreach() in
C:\lighttpd\htdocs\index.php on line 17

Is there a way to give the 'lunch' variable a default value if
undefined?
Thank you.

Make sure $_POST['lunch'] is set and is an array. Check out isset() and
is_array().

And ALWAYS validate information coming from the user. NEVER assume
you're getting something.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
==================

[Gucci]

try
<?php
foreach ($lunch as $choice) {
print "You want a $choice bun. <br/>";
}
?>

[Juliette]

Gucci wrote:

try
<?php
foreach ($lunch as $choice) {
print "You want a $choice bun. <br/>";
}
?>

RED ALERT ! never work with register_globals on

[Manish]

<?php

if(is_array($_POST['lunch']) && count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br/>";
}
}

?>

[Lenard Redwood]

Manish wrote:

<?php

if(is_array($_POST['lunch']) && count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br/>";
}
}

?>

Thank you. Now I get this error:

Notice: Undefined index: lunch in C:\lighttpd\htdocs\index.php on line
17

[Jerry Stuckle]

Lenard Redwood wrote:

Manish wrote:

>><?php

if(is_array($_POST['lunch']) && count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br/>";
}
}

?>

Thank you. Now I get this error:

Notice: Undefined index: lunch in C:\lighttpd\htdocs\index.php on line
17

See my earlier suggestion. Before checking if it's an array, you should
see if it's even set:

if(isset($_POST['lunch']) && is_array($_POST['lunch']) &&
count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br>";
}
}

BTW - <br/is valid for xml but not html.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
==================

[Charles]

Jerry Stuckle wrote:

See my earlier suggestion. Before checking if it's an array, you should
see if it's even set:

if(isset($_POST['lunch']) && is_array($_POST['lunch']) &&
count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br>";
}
}

Yes! Thank you Jerry! Working great now :)

[Chuck Anderson]

Jerry Stuckle wrote:

Lenard Redwood wrote:

>Manish wrote:

>><?php

if(is_array($_POST['lunch']) && count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br/>";
}
}

?>

Thank you. Now I get this error:

Notice: Undefined index: lunch in C:\lighttpd\htdocs\index.php on line
17

See my earlier suggestion. Before checking if it's an array, you should
see if it's even set:

if(isset($_POST['lunch']) && is_array($_POST['lunch']) &&
count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br>";
}
}

BTW - <br/is valid for xml but not html.

"&& count($_POST['lunch'])" seems superfluous here. If it's an array
(empty or not), then foreach will not issue a warning.

--
*****************************
Chuck Anderson • Boulder, CO
http://www.CycleTourist.com
*****************************

[william.clarke]

Jerry Stuckle wrote:

See my earlier suggestion. Before checking if it's an array, you should
see if it's even set:

if(isset($_POST['lunch']) && is_array($_POST['lunch']) &&
count($_POST['lunch'])) {
foreach ($_POST['lunch'] as $choice) {
print "You want a $choice bun. <br>";
}
}

BTW - <br/is valid for xml but not html.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
==================

<br /for XHTML
<brfor HTML