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why are arrays being dropped, and individual array elements that need to, not?

Posted on 2011-09-09
9
178 Views
Last Modified: 2012-05-12
hi. i am at my end's wits here, this one is especially for Ray_Paseur and kaufmed to toggle over.
i have used the functions developed in other php/regular expression posts - to retrieve the form and elements as an array, giving info on wether the element is disabled or not.
now the weird thing is, the array gets emptied when i wish to step through it and prepare the POST strings? 0o
the code i am talking about is as follows:
// load form
$url = "https://lmx.leads360.com/web/login.aspx";
$browser = file_get_contents($url);
$forms = getforms($browser);
$form = "form1";
// drop hidden elements and populate form
for ($i = count($forms[$form]) - 1; $i > 0; $i--) {
	if (($forms[$form][$i]["checked"]=="false" && ($forms[$form][$i]["type"] == "checkbox" || $forms[$form][$i]["type"] == "radio")) || $forms[0][$i]["disabled"]=="true") {
			unset($forms[$form][$i]);
	}
	if ($forms[$form][$i]["name"]=="usernameTextBox") {
		$forms[$form][$i]["value"]="user@domain";
	}
	if ($forms[$form][$i]["name"]=="passwordTextBox") {
		$forms[$form][$i]["value"]="P455W0rd";
	}
}
// print_r of the array here prints as expected but it's not removing the items - ergo something is wrong with the if statement around the unset function - but i cannot see what -_-
// print_r($forms);

// compile post strings
$action = $forms[$form][0]["action"];
$url = http_build_url($url,$action,HTTP_URL_JOIN_PATH);
$data = "";
for ($n = 1; $n < count($forms[$form]); $n++) {
	$data .= ($n > 0)?"&":"".$forms[$form][$n]["name"]."=".urlencode($forms[$form][$n]["value"]);
}

// print post data
echo $url."\n".
	$data;

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the root question is i guess, what the heck am i doing wrong that it does not return as expected???
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Question by:intellisource
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9 Comments
 

Author Comment

by:intellisource
ID: 36511452
ok sorted out the arrays elements being dropped, also the execution of the http_build_url function.
now the only problem is to figure out why the heck it's emptying the array after creating the post string. :(
the code has changed to follows:
// retrieve form
$url = "https://lmx.leads360.com/web/login.aspx";
$browser = file_get_contents($url);
$forms = getforms($browser);
$form = "form1";
// drop hidden elements and populate form
for ($i = count($forms[$form]) - 1; $i > 0; $i--) {
	if (($forms[$form][$i]["checked"]=="false" && ($forms[$form][$i]["type"] == "checkbox" || $forms[$form][$i]["type"] == "radio")) || $forms[$form][$i]["disabled"]=="true") {
			unset($forms[$form][$i]);
	} elseif ($forms[$form][$i]["name"]=="usernameTextBox") {
		$forms[$form][$i]["value"]="pierre@greywacke.co.za";
	} elseif ($forms[$form][$i]["name"]=="passwordTextBox") {
		$forms[$form][$i]["value"]="Wacker82118";
	}
}
// print_r of the array here prints as expected but it's not removing the items 0o
print_r($forms);
// compile post strings
$action = $forms[$form][0]["action"];
$url = http_build_url($url,array($action),HTTP_URL_JOIN_PATH);
$data = "";
for ($n = 1; $n < count($forms[$form]); $n++) {
	if (isset($forms[$form][$n])) {
		$data .= ($n > 0)?"&":"".$forms[$form][$n]["name"]."=".urlencode($forms[$form][$n]["value"]);
	}
}
// print action & post data (post data remains blank :|)
echo $url."\n".
	$data;

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0
 
LVL 22

Expert Comment

by:Kim Walker
ID: 36511476
Just perusing your code I noticed at the end of line 8 you have $forms[0][$i] where elsewhere on that line you have $forms[$form][$i]. I'm going to look a little deeper, but wondered if that was correct.
0
 
LVL 40

Expert Comment

by:Richard Quadling
ID: 36511620
Can you either supply the getforms() function or a print_r($forms) before you start processing it please.

At this stage we don't know if the issue lies outside of this code.
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LVL 22

Expert Comment

by:Kim Walker
ID: 36511626
The way I read this, your $data should be a string of ampersands "&&&&" since that's all that will be appended to $data if $n>0 which is always is since it starts with 1.
0
 
LVL 22

Accepted Solution

by:
Kim Walker earned 500 total points
ID: 36511650
I just recognized (I think) what you're trying to do. Add a couple of parentheses to line 24:

$data .= (($n > 0)?"&":"").$forms[$form][$n]["name"]."=".urlencode($forms[$form][$n]["value"]);

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0
 
LVL 40

Expert Comment

by:Richard Quadling
ID: 36511672
Try
$data .= (($n > 0) ? "&" : "") . $forms[$form][$n]["name"] . "=" . urlencode($forms[$form][$n]["value"]);

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The third expression doesn't terminate at the .

So you're current code looks like ..

if ($n >0) {
 $data .= '&';
} else {
 $data .= '' . $forms[$form][$n]["name"] . "=" . urlencode($forms[$form][$n]["value"]);
}

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rather than ...

if ($n >0) {
 $data .= '&';
} else {
 $data .= '';
}
$data .= $forms[$form][$n]["name"] . "=" . urlencode($forms[$form][$n]["value"]);

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0
 
LVL 40

Expert Comment

by:Richard Quadling
ID: 36511690
Maybe it simply easier to ...

if ($n >0) {
 $data .= '&';
}
$data .= $forms[$form][$n]["name"] . "=" . urlencode($forms[$form][$n]["value"]);

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0
 

Author Comment

by:intellisource
ID: 36516008
the current code is below the returned array, the function getforms behaves as expected and returns the following array from the print_r in line 17:
Array
(
    [form1] => Array
        (
            [0] => Array
                (
                    [type] => form
                    [action] => login.aspx
                )

            [1] => Array
                (
                    [input] => input
                    [type] => hidden
                    [name] => __VIEWSTATE
                    [value] => 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
                    [checked] => false
                    [disabled] => false
                )

            [2] => Array
                (
                    [input] => input
                    [type] => hidden
                    [name] => __EVENTVALIDATION
                    [value] => /wEWBQL7tbDVBgLw0JndDgLi/qahAwKSuuDUCwKCkfPgDOt1y12mZhJ/qB81miBJ4pLiwjLK
                    [checked] => false
                    [disabled] => false
                )

            [3] => Array
                (
                    [input] => input
                    [type] => text
                    [name] => usernameTextBox
                    [value] => pierre@greywacke.co.za
                    [checked] => false
                    [disabled] => false
                )

            [4] => Array
                (
                    [input] => input
                    [type] => password
                    [name] => passwordTextBox
                    [value] => Wacker82118
                    [checked] => false
                    [disabled] => false
                )

        )

)

Open in new window

the array always has the form as the first element in the array.
// retrieve form
$url = "https://lmx.leads360.com/web/login.aspx";
$browser = file_get_contents($url);
$forms = getforms($browser);
$form = "form1";
// drop hidden elements and populate form
for ($i = count($forms[$form]) - 1; $i > 0; $i--) {
	if (($forms[$form][$i]["checked"]=="false" && ($forms[$form][$i]["type"] == "checkbox" || $forms[$form][$i]["type"] == "radio")) || $forms[$form][$i]["disabled"]=="true") {
			unset($forms[$form][$i]);
	} elseif ($forms[$form][$i]["name"]=="usernameTextBox") {
		$forms[$form][$i]["value"]="pierre@greywacke.co.za";
	} elseif ($forms[$form][$i]["name"]=="passwordTextBox") {
		$forms[$form][$i]["value"]="Wacker82118";
	}
}
// print_r of the array here prints as expected 0o
print_r($forms);
// compile post strings
$action = $forms[$form][0]["action"];
$url = http_build_url($url,array($action),HTTP_URL_JOIN_PATH);
$data = "";
// $forms array is cleared out by here - WHY????
for ($n = 1; $n < count($forms[$form]); $n++) {
	if (isset($forms[$form][$n])) {
		$data .= (($n > 0)?"&":"").$forms[$form][$n]["name"]."=".urlencode($forms[$form][$n]["value"];
	}
}
// print action & post data (post data remains blank :|)
echo $url."\n".
	$data;

Open in new window

0
 

Author Closing Comment

by:intellisource
ID: 36516018
thanks this worked :D can't believe i missed something small like that... :o
0

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