php check boxes and url

This is the code for the checkbox input in the page body:

<input type="checkbox" name="custname<?php echo $row_orders['ID']; ?>" id="custname<?php echo $row_orders['ID']; ?>" value="1" <?php if ($_SESSION[base64_encode($row_orders['ID'])] == 1) { ?>checked="checked"<?php } ?>/>



This is the code for generating the url:

//generate CSV link url
$custname = "unchecked";

if (isset($_GET['custname'])) {

if ($custname == '1') {
$custname = 'checked';

}

}
$csv_url2 = "p=1&";
do {
if (!empty($_SESSION[base64_encode($row_ordersb[ID])])) {
      $csv_url2 .= "cn[$row_ordersb[CustName]]&";
      }
} while ($row_ordersb = mysql_fetch_assoc($ordersb));
$csv_url2 .= $csv_url2."p=1";

What I need is to be able to uncheck the "custname" checkbox for certain customers and this will stop that name from being included in the url. At the moment ALL names are being submitted in the url.
doctorbillTechAsked:
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Ray PaseurCommented:
You might want to learn about HEREDOC notation in PHP.  It is much easier to use than something like this.

<input type="checkbox" name="custname<?php echo $row_orders['ID']; ?>" id="custname<?php echo $row_orders['ID']; ?>" value="1" <?php if ($_SESSION[base64_encode($row_orders['ID'])] == 1) { ?>checked="checked"<?php } ?>/>

The bold part of that input control is what you would want to change.  Not sure how you might determine who the "certain customer" would be, but I am guessing that you could use an if() statement, testing some variable.
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Ray PaseurCommented:
See http://www.laprbass.com/RAY_temp_doctorbill.php
Outputs
<input type="checkbox" name="custname3" id="custname3" value="1" />

Here is the man page ref about HEREDOC.  It's very useful for separating code from presentation.
http://us3.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc
<?php // RAY_temp_doctorbill.php
error_reporting(E_ALL ^ E_NOTICE);


// FROM EE
/* <input type="checkbox" name="custname<?php echo $row_orders['ID']; ?>" id="custname<?php echo $row_orders['ID']; ?>" value="1" <?php if ($_SESSION[base64_encode($row_orders['ID'])] == 1) { ?>checked="checked"<?php } ?>/> */


// SOME TEST DATA
$row_orders['ID'] = 3;


// SETTING LOCAL VARIABLES FOR USE IN HEREDOC BLOCK
$c = 'custname' . $row_orders['ID'];
$i = 'custname' . $row_orders['ID'];
$x = NULL;
if ($_SESSION[base64_encode($row_orders['ID'])] == 1) $x = ' checked="checked" ';

// USING HEREDOC TO MAKE IT CLEARER AND EASIER TO WORK WITH
$input = <<<ENDINPUT
<input type="checkbox" name="$c" id="$i" value="1" $x />
ENDINPUT;

echo htmlentities($input);

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doctorbillTechAuthor Commented:
Sorry - this:
<input type="checkbox" name="custname<?php echo $row_orders['ID']; ?>" id="custname<?php echo $row_orders['ID']; ?>" value="1" <?php if ($_SESSION[base64_encode($row_orders['ID'])] == 1) { ?>checked="checked"<?php } ?>/>

Should be this:
<input type="checkbox" name="custname<?php echo $row_orders['ID']; ?>" id="custname<?php echo $row_orders['ID']; ?>" value="1" />
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doctorbillTechAuthor Commented:
Please see my edit directly above

Also, how do I usew this to build the url I mentioned ?
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Ray PaseurCommented:
I think we need a little more explanation of the part about "build the URL"  What information do you want to put into the GET request?  Where does it come from?
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doctorbillTechAuthor Commented:
This is the checkbox input:
<input type="checkbox" name="custname<?php echo $row_orders['ID']; ?>" id="custname<?php echo $row_orders['ID']; ?>" value="1" />

This generates the url - I use the "$csv_url2 .= $csv_url2."p=1";" which works fine. What I simply need is to be able to dictate the customer name which is used in the url by the checkbox. ie if the checkbox is checked, that customer name is used in the url. Obviously the first part of the script below is not correct. It would be helpful to me if you can adapt this script rather than using a new one

//generate CSV link url
$custname = "unchecked";

if (isset($_GET['custname'])) {

if ($custname == '1') {
$custname = 'checked';

}

}
$csv_url2 = "p=1&";
do {
if (!empty($_SESSION[base64_encode($row_ordersb[ID])])) {
      $csv_url2 .= "cn[$row_ordersb[CustName]]&";
      }
} while ($row_ordersb = mysql_fetch_assoc($ordersb));
$csv_url2 .= $csv_url2."p=1";
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Ray PaseurCommented:
There is not enough of a script there to adapt, and I would only be guessing about where the data comes from and where it goes to.  Can you please post the entire script (please use the code snippet) for both the form and the action script, thanks.
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doctorbillTechAuthor Commented:
Can you simply give me an example of how to build a url from check box data - if the check box is checked, the data is put into the url, if it is unchecked, it is not put into the url.
The script above is working for me BUT it does not recognise whether the check box is checked or not. I just need to know how to tell the script that the checkbox is either checked or not checked
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Ray PaseurCommented:
Sure, that's easy.  Unchecked checkboxes do not come through in the request string.  Experiment with this and watch the URL.
http://www.laprbass.com/RAY_temp_doctorbill.php
<?php // RAY_temp_doctorbill.php
error_reporting(E_ALL);

// SHOW THE REQUEST ARGUMENTS, IF ANY
var_dump($_GET);

// PRESERVE THE STATE OF THE CHECKBOX
$checked = NULL;
if (!empty($_GET["c"])) $checked = 'checked';

// USING HEREDOC
$form = <<<ENDFORM
<form>
<input type="checkbox" name="c" value="foo" $checked /> CHECK THIS BOX TO SEE "foo" OR UNCHECK IT TO HIDE "foo"
<input type="submit" />
</form>
ENDFORM;

echo $form;

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doctorbillTechAuthor Commented:
I didn't manage to get  a working script but did learn some new methods
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