循环生成多个选择 - 如何使用php记住每个选定选项上的发布数据

Question

I have this loop which generates selects:

$loops=7;    
//for($j=1;$j<=$loops;$j++){
foreach($_SESSION['product'] as $key=>$val){    
$quantity = 7;    
$selqty = '<div class="optchk"><select name="qty[]" class="qty">';    
for($i=1;$i<=$quantity;$i++){    
$selqty.='<option value="'.$i.'">'.$i.'</option>';    

}
$selqty.='</select></div>';
}
echo '<form method="post" action="" name="orderform">';    
echo $selqty;
echo '<input type="submit" name="order_submit" value="Send"></form>';

How to keep each selected option for all those 7 selects after form submit? Thank you

post looks like :

array(7) { 
[0]=> string(1) "2" 
[1]=> string(1) "3" 
[2]=> string(1) "4" 
[3]=> string(1) "4" 
[4]=> string(1) "2" 
[5]=> string(1) "3" 
[6]=> string(1) "4"
}

and I tried the following :

<?php if($_POST['qty'] =$i) $selected= 'selected=selected';
$selqty.='<option '.$selected.' value="'.$i.'">'.$i.'</option>';
?>    

but it is wrong

Answer 1

As you are using action = "" you can check the values of qty[] and select the corresponding value for each select. Here is a working code:

$loops=7; 
$selqty = "";
$j = 0;
foreach($_SESSION['product'] as $key=>$val)
{    
    $j++;
$quantity = 7;    
$selqty .= '<div class="optchk"><select name="qty[]" class="qty">';    
for($i=1;$i<=$quantity;$i++)
{    
    $selected = "";
    if(isset($_POST['qty']) && $i == $_POST['qty'][$j-1])
        $selected = "selected";

    $selqty.='<option value="'.$i.'"'.$selected.'>'.$i.'</option>';    
}
$selqty.='</select></div>';
}
echo '<form method="post" action="" name="orderform">';    
echo $selqty;
echo '<input type="submit" name="order_submit" value="Send"></form>';

I also recommend you to get used to using double quotes when inserting php variables into strings:

You can use

$selqty.="<option value='$i' $selected> $i </option>";

insetad of

$selqty.='<option value="'.$i.'"'.$selected.'>'.$i.'</option>';

Which I think is easier to read and understand.