PHP Curl undefined variable error

Question

Hi im attempting to login to a website using PHP and Curl. The problem I am having is that the names of the input fields on the website I want to log into have names that the script thinks is a variable. So when I run the script I get an error saying undefined variables.

$fields = "[email protected]&ctl00$MainContent$PasswordText=xxxx";

The errors I am getting are:

Notice: Undefined variable: MainContent 

Notice: Undefined variable: EmailText

Notice: Undefined variable: PasswordText

Is there any way around this?

Menztrual · Accepted Answer · 2012-09-16 20:52:06Z

3

Use single quotes:

$fields = '[email protected]&ctl00$MainContent$PasswordText=xxxx';

answered Sep 16, 2012 at 20:52

Menztrual

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Jon · Accepted Answer · 2012-09-16 20:52:04Z

2

Yes, put the string inside single quotes instead of double.

answered Sep 16, 2012 at 20:52

Jon

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3 Comments

M9A Over a year ago

I tried that but I just get redirected to the login page instead

Jon Over a year ago

@Matt9Atkins: Don't you think that there is absolutely no information here to let anyone determine why that happens? Why didn't you mention that you tried it anyway?

M9A Over a year ago

sorry, I guess I will leave that for a new question. Thanks

Rolf Wenger · Accepted Answer · 2012-09-16 20:57:23Z

2

If you use ' instead of " of your variable-definition, php will not interpret the content inside. See: http://php.net/manual/en/language.types.string.php

Additionally, i always use the curl-option CURLOPT_POSTFIELDS for handling post-fields - because with this i can submit an array containing my values - that gives more beautiful code:

$curlhandle = curl_init();
$post_values = array(
    'ctl00$MainContent$EmailText' => '[email protected]'
    'ctl00$MainContent$PasswordText' => 'xxxx'
);
curl_setopt($curlhandle, CURLOPT_POST, true);
curl_setopt($curlhandle, CURLOPT_POSTFIELDS, $post_values);

answered Sep 16, 2012 at 20:57

Rolf Wenger

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