hello
I have checkbox to display the months .Is good in the insert form But in the update form I want the months that have been checked in the insert form ,have checked in the update form
i used this code to dispaly check boc
<input type="checkbox" name="months[]" id="months" value="<?php echo $key; ?>" >
any help?
You need to add some code to see if the box was already checked, if it was add the checked=“checked” attribute the input. 
I know that,but how ? can you help me?
You need to emulate something similar to:-
<?php
$checked = array(
'bar'
);
$boxes = array(
'foo',
'bar'
);
foreach($boxes as $box){
printf(
'<input type="checkbox" %s name="%s" />' . PHP_EOL,
in_array($box, $checked) ? 'checked="checked"' : '',
$box
);
}
/*
<input type="checkbox" name="foo" />
<input type="checkbox" checked="checked" name="bar" />
*/