Save form script. Problem

**lindm** · 07-09-2007, 09:41 PM

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);

?>

**djr33** · 07-09-2007, 10:37 PM

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.

**lindm** · 07-10-2007, 07:39 AM

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);

?>

**tech_support** · 07-10-2007, 07:49 AM

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);

?>

**djr33** · 07-10-2007, 07:50 AM

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
?>

**tech_support** · 07-10-2007, 07:53 AM

PHP Code:


$$key

?

**djr33** · 07-10-2007, 07:54 AM

See the comments I added (edited).

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

**lindm** · 07-10-2007, 08:59 AM

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);



?>

**djr33** · 07-10-2007, 09:01 AM

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.

**tech_support** · 07-10-2007, 09:01 AM

Have you tried the one I posted?

//Me just confused at djr33's one

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