Richard Davey wrote:
Hi all,
Ok it's 2am, my brain has gone to mush and I am having trouble
figuring out an easy way to do this, can anyone shed some light?
Take a peek at the following code:
// START
<pre>
<?php
print_r($_POST);
$userparam = "test['sam'][]";
// How to check if $userparam exists in the $_POST array
// and get all the values from it?
// Obviously this won't work, but you get the idea:
if (isset($_POST[$userparam]))
{
echo 'yeah';
$values = $_POST[$userparam];
}
else
{
echo 'nah';
}
?>
</pre>
<form method="post">
<input type="checkbox" name="test['bob'][]" value="red">red<br>
<input type="checkbox" name="test['bob'][]" value="green">green<br>
<input type="checkbox" name="test['bob'][]" value="blue">blue<br>
<input type="checkbox" name="test['sam'][]" value="red2">red2<br>
<input type="checkbox" name="test['sam'][]" value="green2">green2<br>
<input type="checkbox" name="test['sam'][]" value="blue2">blue2<br>
<input type="submit">
</form>
// END
From the code above I'm trying to figure out how to tell if the
$userparam exists in the $_POST array. PHP automatically expands the
form element name into multi-dim arrays within $_POST, so a simple
'isset' as shown in the code above won't play because it's got a
totally useless array key passed to it.
I need a way to turn the string:
"test['sam'][]"
into something I can look into $_POST for.
Any ideas? The coffee boost is wearing off, but I want to get this
licked tonight :-\
Cheers,
Rich
taking a step back and looking a little closer at the problem. I have come up with this
Which does not require eval()
Maybe this will work for the OP
<pre>
<?php
$param = 'test[sam][colors][]';
function find_within_array($string, $source) {
$data = array();
$tmp = $source;
if ( preg_match_all('/(\[?([\w]+)\]?)/', $string, $matches, PREG_SET_ORDER) ) {
if ( count($matches) > 1 ) {
for ( $i = 0; $i<count($matches); $i++ ) {
if ( isset($tmp[$matches[$i][2]]) ) {
if ( is_array($tmp[$matches[$i][2]]) ) {
foreach ($tmp[$matches[$i][2]] AS $value ) {
if ( is_string($value) ) {
$data[] = $value;
}
}
}
$tmp = $tmp[$matches[$i][2]];
}
}
return $data;
}
}
return array();
}
$results = find_within_array($param, $_POST);
if ( count($results) > 0 ) {
echo "yeah\n";
echo join(':', $results);
} else {
echo 'nah';
}
?>
</pre>
<form method="post">
<input type="checkbox" name="test[bob][colors][]" value="red">red<br>
<input type="checkbox" name="test[bob][colors][]" value="green">green<br>
<input type="checkbox" name="test[bob][colors][]" value="blue">blue<br>
<input type="checkbox" name="test[sam][colors][]" value="red">red<br>
<input type="checkbox" name="test[sam][colors][]" value="green">green<br>
<input type="checkbox" name="test[sam][colors][]" value="blue">blue<br>
<input type="submit">
</form>
--
Jim Lucas
"Some men are born to greatness, some achieve greatness,
and some have greatness thrust upon them."
Twelfth Night, Act II, Scene V
by William Shakespeare
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