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+--- Thread: Checkbox checked value with foreach 2 arrays of different size (/showthread.php?tid=67534)
Checkbox checked value with foreach 2 arrays of different size - rubens - 03-06-2017
Hi guys.
I need to know how I can do the code below in a better way, because although it works fine for what I need, the code does not look good / organized.
Explanation of the code:
. $list => an array of data coming from a database table with 2 fields (Id and name)
. $sess_temp = an array containing some values (strings and arrays). This array was created by function $this->session->set_tempdata()
Values of the variable $sess_temp:
PHP Code:
array(
'type'=> 1,
'step1' => array(SOME DATA HERE),
'step2' => array(SOME DATA HERE),
'step3' => array(SOME DATA HERE),
'step4' => array(checkbox values here) // Like: array(0 => checkboxId1, 1 => checkboxId10)
);
//if user checked some checkboxes(like checkbox value 1/3/15/50), then step4 will be
'step4' => array(
'0' => '1',
'1' => '3',
'2' => '15',
'3' => '50'
)
Values of the variable $list:
PHP Code:
array(
array('id' => 1, 'name' => 'List item 1'),
array('id' => 2, 'name' => 'List item 2'),
array('id' => 3, 'name' => 'List item 3'),
array('id' => 4, 'name' => 'List item 4'),
array('id' => 5, 'name' => 'List item 5'),
//...continue with more data
);
// id == int(11) PRIMARY auto increment
// name == varchar(232)
PHP Code:
if(isset($sess_temp['step4'])){
//Foreach step4 array to get checkbox checked values
foreach($sess_temp['step4'] as $key => $value){
$sess[$value] = $value;
}
}
//Foreach array $list from database
foreach ($list as $lt){
//Add checked attr if ID of current item match with the array stored in $sess_temp['step4']
if(isset($sess[$lt['id']]) == $lt['id']){
$ck = 'checked';
}else{
$ck='';
}
echo '<li class="checkbox">
<label>
<input type="checkbox" name="lists[]" value="'.$lt['id'].'" '.set_checkbox('lists', $lt['id']).' '.$ck.' />
'.$lt['name'].'
</label>
</li>';
}
This code will print this:
PHP Code:
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="1" checked>Item name 1 here</label></li> //Checked attr, like above mentioned
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="2">Item name 2 here</label></li>
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="3" checked>Item name 3 here</label></li> //Checked attr, like above mentioned
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="4">Item name 4 here</label></li>
<!-- CONTINUE -->
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="15" checked>Item name 5 here</label></li> //Checked attr, like above mentioned
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="16">Item name 16 here</label></li>
<!-- CONTINUE -->
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="49">Item name 49 here</label></li>
<li class="checkbox"><label><input type="checkbox" name="lists[]" value="50" checked>Item name 50 here</label></li> //Checked attr, like above mentioned
Thanks guys
RE: Checkbox checked value with foreach 2 arrays of different size - Wouter60 - 03-06-2017
In your 3rd code-block, you have 2 foreach ... loops.
Forget the first one.
In the second one:
PHP Code:
$ck = in_array($sess_temp['step4'],$lt['id']) ? 'checked' : NULL;
The step4 array is an associative array, but you don't do anything with the $key, so you don't really need that.
The rest of the code seems OK to me.
RE: Checkbox checked value with foreach 2 arrays of different size - rubens - 03-06-2017
(03-06-2017, 11:56 AM)Wouter60 Wrote: In your 3rd code-block, you have 2 foreach ... loops.
Forget the first one.
In the second one:
This single line of code can "calculate" the correct value for $ck. It checks if the $lt['id'] value is in the $sess_temp['step4'] array.PHP Code:$ck = in_array($sess_temp['step4'],$lt['id']) ? 'checked' : NULL;
The step4 array is an associative array, but you don't do anything with the $key, so you don't really need that.
The rest of the code seems OK to me.
Hi friend.
I just had to make two changes to make it perfect, see how it is now.
PHP Code:
foreach ($list as $lt){
$ck = @in_array($lt['id'],$sess_temp['step4']) ? 'checked' : NULL;
echo '<li class="checkbox">
<label>
<input type="checkbox" name="lists[]" value="'.$lt['id'].'" '.set_checkbox('lists', $lt['id']).' '.$ck.' />
'.$lt['name'].'
</label>
</li>';
}
I just had to invert the values of the in_array, because it was necessary to see if the second parameter was contained in the first, not the other way around.
I also had to add the @ so that it only returns "true" if the $sess_temp['step4'] is different from empty.
Thanks for your suggestion, it worked very well for what I was needing.