Save form script. Problem

I am a beginner and building a form processor script that is intended to make a backup of the submitted form, in html format. I might be using the wrong technique, but here is a simple setup of my processor script (writeform.php). My problem is the checkboxes...how can I reproduce a checked checkbox within the $stringData, which depends on if the submitted checkbox is checked?

<?php
$file = fopen("formsaved.html", "w") or exit("Unable to open file!");

$stringData =

'<head>
</head>

<form id="form1" name="form1" method="post" action="writeform.php">
<input type="text" name="1" id="1" value="'.$_POST['1'].'"/>
<br />
<input type="text" name="2" id="2"/>
<br />
<input type="checkbox" name="check" id="check" />
<br />
<input type="submit" name="button" id="button" value="Save" />
</form>

<body>
</html>
'
;
fwrite($file, $stringData);
fclose($file);

?>

PHP Code:

$ifchecked = ''; //initialize to blank if ($_POST['check'] == 1) $ifchecked = 'checked '; '.....<input type="checkbox" name="check" id="check" '.$ifchecked.'/>.....'

That will add ... checked /> to the checkbox if the value of the submitted checkbox was 1 (checked). Or, it will just leave as is.

Quote:

Originally Posted by djr33

PHP Code:

$ifchecked = ''; //initialize to blank if ($_POST['check'] == 1) $ifchecked = 'checked '; '.....<input type="checkbox" name="check" id="check" '.$ifchecked.'/>.....'

That will add ... checked /> to the checkbox if the value of the submitted checkbox was 1 (checked). Or, it will just leave as is.

Perfect thanks. Added a small adjustment so that it would work (the checked=). Next question...say I have 50 checkboxes in a form...is there an easier way to perform the check than having to setup a $ifchecked1, $ifchecked2, ... $ifchecked50?

CURRENT STATE
<?php
$file = fopen("formsaved.html", "w") or exit("Unable to open file!");

$ifchecked = ''; //initialize to blank
if ($_POST['check'] == 1) $ifchecked = 'checked ';

$stringData =

'<head>
</head>

<form id="form1" name="form1" method="post" action="writeform.php">
<input type="text" name="1" id="1" value="'.$_POST['1'].'"/>
<br />
<input type="text" name="2" id="2"/>
<br />
<input type="checkbox" name="check" id="check" checked="'.$ifchecked.'"/>
<br />
<input type="submit" name="button" id="button" value="Save" />
</form>

<body>
</html>
'

;
fwrite($file, $stringData);
fclose($file);

?>

Try this:

PHP Code:

$ifchecked = array(); $checkboxes = ''; for ($i=1; $i < 51; $i++) { if ($_POST['check'.$i] == $i) {$ifchecked[$i] = 'checked ';} else { $ifchecked[$i] = ''; } $checkboxes .= '<input type="checkbox" name="check'.$i.'" id="check'.$i.'" checked="'.$ifchecked[$i].'"/>'."\n"; } $stringData = '<head> </head> <form id="form1" name="form1" method="post" action="writeform.php"> <input type="text" name="1" id="1" value="'.$_POST['1'].'"/> <br /> <input type="text" name="2" id="2"/> <br /> '.$checkboxes.' <br /> <input type="submit" name="button" id="button" value="Save" /> </form> <body> </html> ' ; fwrite($file, $stringData); fclose($file); ?>

You could do a foreach loop using $_POST, and then check if the name is checkbox____.

PHP Code:

<?php foreach ($_POST as $key => $value) { //run through each $_POST variable, $key as the name, $value as value if (strpos($key,'checkbox')===0) { //if the name of that variable starts with checkbox... if ($value==1) { //and it is checked $$key = ' checked'; //set $$key, meaning $checkbox#, to checked } } //end ifs/foreach } //do your code below for the form, using explicit variables //like $checkbox34 ?>

PHP Code:

$$key

?

See the comments I added (edited).

$$key is the variably-named variable, such as $checkbox5, when $key == 'checkbox5'.

Can't seem to get it to work...see my code below. The regular post contents works, but not the checkbox status.

PHP Code:

<?php $file = fopen("formsaved.html", "w") or exit("Unable to open file!"); foreach ($_POST as $key => $value) { //run through each $_POST variable, $key as the name, $value as value if (strpos($key,'checkbox')===0) { //if the name of that variable starts with checkbox... if ($value==1) { //and it is checked $$key = 'checked'; //set $$key, meaning $checkbox#, to checked } } //end ifs/foreach } //do your code below for the form, using explicit variables //like $checkbox34 $stringData = '<head> </head> <form id="form1" name="form1" method="post" action="writeform.php"> <input type="text" name="1" id="1" value="'.$_POST['1'].'"/> <br /> <input type="text" name="2" id="2"/> <br /> <input type="checkbox" name="checkbox1" id="checkbox1" checked="'.$$key.'"/> <br /> <input type="submit" name="button" id="button" value="Save" /> </form> <body> </html> ' ; fwrite($file, $stringData); fclose($file); ?>

Not $$key in the form, but the explicit name of the variable, $checkbox1, then $checkbox2, etc.

$$key will have the value of $[$key], meaning $last_post_variable_checked, so, probably $button, which is not what you want.

Have you tried the one I posted?

//Me just confused at djr33's one :p

My code is easy. It loops through, uses the $_POST[VALUEHERE] as a variable, then saves that as ' checked', if the checkbox was in the form.

But either way, the code should work if you just use this line:
<input type="checkbox" name="checkbox1" id="checkbox1" checked="'.$checkbox1.'"/>

Ok status update.

Tried your script tech_support and it generates 50 checkboxes in a row. I was probably a bit unclear, I have checkboxes all around my form and the status of these needs to be written to the formsaved.html. Right now I am fiddling with the solution from djr33. The result written to the saved form regardless of if checkbox1 is checked or not is

checked=""

It seems checked="checked" is never written and that checked="" is the same as checked in html code?? Something wrong at least.

Thanks for your help guys. Php is really fun but a bit frustrating sometimes
:)

My current code is

PHP Code:

<?php $file = fopen("formsaved.html", "w") or exit("Unable to open file!"); foreach ($_POST as $key => $value) { //run through each $_POST variable, $key as the name, $value as value if (strpos($key,'checkbox')===0) { //if the name of that variable starts with checkbox... if ($value==1) { //and it is checked $$key = ' checked'; //set $$key, meaning $checkbox#, to checked } } //end ifs/foreach } //do your code below for the form, using explicit variables //like $checkbox34 $stringData = '<head> </head> <form id="form1" name="form1" method="post" action="writeform.php"> <input type="text" name="1" id="1" value="'.$_POST['1'].'"/> <br /> <input type="text" name="2" id="2"/> <br /> <input type="checkbox" name="checkbox1" id="checkbox1" checked="'.$checkbox1.'"/> <br /> <input type="submit" name="button" id="button" value="Save" /> </form> <body> </html> ' ; fwrite($file, $stringData); fclose($file); ?>

Trying a new approach on my own but there is something wrong in the code. Anyone help me?

PHP Code:

<?php $file = fopen("formsaved.html", "w") or exit("Unable to open file!"); function checkbox($checkbox) { (if $_POST[$checkbox.]==1) echo 'checked="checked"'; } //beräkningar $sumformat = number_format(round($_POST['1'] + $_POST['2']), 0, ',', ' '); //data som skrivs till htmlfil $stringData = '<head> </head> <form id="form1" name="form1" method="post" action="writeform.php"> <input type="text" name="1" id="1" value="'.$_POST['1'].'"/> <br /> <input type="text" name="2" id="2" value="'.$_POST['2'].'"/> <br /> <input type="text" name="sum" id="sum" value="'.$sumformat.'"/> <br /> <input type="checkbox" name="checkbox1" id="checkbox1"'checkbox(checkbox1);'/> <br /> <input type="submit" name="button" id="button" value="Save" /> </form> <body> </html> ' ; fwrite($file, $stringData); fclose($file); header("Location: formblank.html"); ?>

PHP Code:

function checkbox($checkbox) { (if $_POST[$checkbox.]==1) echo 'checked="checked"'; }

No need for the dot after $checkbox

PHP Code:

"'checkbox(checkbox1);'/>

checkbox1 should be just 1

But it needs to be checkbox1 because the checkbox element is called this?

There is something bad in my code since it doesn't execute the code at the bottom (forward to page). Any clues?

PHP Code:

<?php $file = fopen("formsaved.html", "w") or exit("Unable to open file!"); //öppnar filen function checkbox($checkbox) { (if $_POST[$checkbox]==1) echo 'checked="checked"'; } //beräkningar $sumformat = number_format(round($_POST['1'] + $_POST['2']), 0, ',', ' '); //data som skrivs till htmlfil $stringData = '<head> </head> <form id="form1" name="form1" method="post" action="writeform.php"> <input type="text" name="1" id="1" value="'.$_POST['1'].'"/> <br /> <input type="text" name="2" id="2" value="'.$_POST['2'].'"/> <br /> <input type="text" name="sum" id="sum" value="'.$sumformat.'"/> <br /> <input type="checkbox" name="checkbox1" id="checkbox1"'checkbox(checkbox1);'/> <br /> <input type="submit" name="button" id="button" value="Save" /> </form> <body> </html> ' ; fwrite($file, $stringData); fclose($file); header("Location: formblank.html"); ?>

if ($value==1) { //and it is checked

try changing that to
if ($value=='checked') { //and it is checked

Since you are using 'checked', rather than '1', as I am used to, with checkboxes.

Alright, now I have got a working solution (see code below). Apparently the value of a checkbox when checked is 'on'. I also changed the code since checked="" seems to be the same as checked="checked".

Thanks for all help!

PHP Code:

<?php $file = fopen("formsaved.html", "w") or exit("Unable to open file!"); //öppnar filen //script för att hantera checkboxes foreach ($_POST as $key => $value) { //run through each $_POST variable, $key as the name, $value as value if (strpos($key,'checkbox')===0) { //if the name of that variable starts with checkbox... if ($value=='on') { //and it is checked $$key = 'checked="checked"'; //set $$key, meaning $checkbox#, to checked } } //end ifs/foreach } //do your code below for the form, using explicit variables //like $checkbox34 //beräkningar $sumformat = number_format(round($_POST['1'] + $_POST['2']), 0, ',', ' '); //data som skrivs till htmlfil $stringData = '<head> </head> <form id="form1" name="form1" method="post" action="writeform.php"> <input type="text" name="1" id="1" value="'.$_POST['1'].'"/> <br /> <input type="text" name="2" id="2" value="'.$_POST['2'].'"/> <br /> <input type="text" name="sum" id="sum" value="'.$sumformat.'"/> <br /> <input type="checkbox" name="checkbox1" id="checkbox1"'.$checkbox1.'/> <input name="checkbox2" type="checkbox" id="checkbox2" '.$checkbox2.'/> <br /> <input type="submit" name="button" id="button" value="Save" /> </form> <body> </html> ' ; fwrite($file, $stringData); fclose($file); header("Location: formblank.html"); ?>