echo selected value of chekbox group after submit

Hello

I tried to find and figure our how to echo the selected value of checkbox group after submit but failed to figure it out, pls help me.

the checkbox code is as below;


<?php
$wa_startindex = 0;
while(!$booksList->atEnd()) {
$wa_startindex = $booksList->Index;
?>
<label class="form-check-label pl-3">
<input name="book[]" type="checkbox" class="form-check-input" value="<?php echo($booksList->getColumnVal("BookID")); ?>"><?php echo($booksList->getColumnVal("BookNameBD")); ?>

</label>


<?php
$booksList->moveNext();
}
$booksList->moveFirst(); //return RS to first record
unset($wa_startindex);
unset($wa_repeatcount);
?>

I need context. How do you get the value of an input element after submit? Is the submit a $_GET or $_POST? Is this on the action page of the form?

Originally Said By: Ray Borduin

  I need context. How do you get the value of an input element after submit? Is the submit a $_GET or $_POST? Is this on the action page of the form?  

This is on $_GET on the action page form

<form name="searchForm" action="/hadith/search/filter/" method="GET" accept-charset="UTF-8">
<div class="form-row">
<div class="col-md-6 col-sm-12 my-1">
<input class="form-control" type="text" name="q" value="<?php echo ((isset($_GET["q"]))?$_GET["q"]:""); ?>" placeholder="যে শব্দ দিয়ে খুঁজতে চান..." required>
</div>

<div class="col-auto my-1">
<select name="lang" id="lang" class="custom-select mr-sm-2" required>
<option value="">-ভাষা সিলেক্ট-</option>
<option value="bn" <?php if (!(strcmp("bn", ((isset($_GET["lang"]))?$_GET["lang"]:"")))) {echo "selected=\"selected\"";} ?>>শুধু বাংলা</option>
<option value="en" <?php if (!(strcmp("en", ((isset($_GET["lang"]))?$_GET["lang"]:"")))) {echo "selected=\"selected\"";} ?>>English only</option>
<option value="ar" <?php if (!(strcmp("ar", ((isset($_GET["lang"]))?$_GET["lang"]:"")))) {echo "selected=\"selected\"";} ?>>العربية</option>
<option value="all"<?php if (!(strcmp("all", ((isset($_GET["lang"]))?$_GET["lang"]:"")))) {echo "selected=\"selected\"";} ?>>বাংলা/العربية</option>
</select>
</div>
<div class="col-auto my-1">
<div class="custom-control custom-checkbox mr-sm-2">
<input type="checkbox" class="custom-control-input" id="customControlAutosizing" name="exact" value="1" <?php if (!(strcmp(((isset($_GET["exact"]))?$_GET["exact"]:""),1))) {echo "checked=\"checked\"";} ?>>

<label class="custom-control-label" for="customControlAutosizing">হুবহু শব্দে</label>
</div>
</div>

<div class="col-auto my-1">

<script language="JavaScript">
function toggle(source) {
checkboxes = document.getElementsByName('book[]');
for(var i=0, n=checkboxes.length;i<n;i++) {
checkboxes[i].checked = source.checked;
}
}
</script>
<div class="form-check pl-3">
<input type="checkbox" onClick="toggle(this)" /><span class="text-danger"> সব বই সিলেক্ট করুন</span>
</div>
<div class="form-check">
<?php
$wa_startindex = 0;
while(!$booksList->atEnd()) {
$wa_startindex = $booksList->Index;
?>
<label class="form-check-label pl-3">
<input name="book[]" type="checkbox" class="form-check-input" value="<?php echo($booksList->getColumnVal("BookID")); ?>"><?php echo($booksList->getColumnVal("BookNameBD")); ?>
</label>


<?php
$booksList->moveNext();
}
$booksList->moveFirst(); //return RS to first record
unset($wa_startindex);
unset($wa_repeatcount);
?>
</div>
</div>


<div class="col mb-2 my-1">
<button type="submit" name="WADbSearch1" class="btn btn-dark btn-block"><i class="fas fa-search"></i> খুঁজুন</button>
</div>

</div>
</form>

I think this would work then:

<input name="book[]" type="checkbox" class="form-check-input" <?php echo(in_array($booksList->getColumnVal("BookID"),isset($_GET["book"])?$_GET["book"]:array())?"checked":""); ?> value="<?php echo($booksList->getColumnVal("BookID")); ?>"><?php echo($booksList->getColumnVal("BookNameBD")); ?>