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here i have a simple code which is response using ajax . in action page i have select box(for qty)(9 options)(size="1") . my code checks in database product qty so i want to display the qty(from database) "selected" . how can i use ternary operator
Here is my code
if (isset($_POST['getcart'])){
$cart_item_query = "SELECT * FROM cart";
$cart_item_run = mysqli_query($conn,$cart_item_query);
if (mysqli_num_rows($cart_item_run)>0){
$grand_total=0;
while($cart_row=mysqli_fetch_array($cart_item_run)){
$pro_id = $cart_row['product_id'];
$pro_qty = $cart_row['qty'];
$product_query = "SELECT * FROM products WHERE product_id = '$pro_id'";
$product_run = mysqli_query($conn, $product_query);
$product_row = mysqli_fetch_array($product_run);
$pro_name = $product_row['product_name'];
$pro_image = $product_row['product_image'];
$pro_sell_price = $product_row['sell_price'];
$total = $pro_sell_price*$pro_qty;
$grand_total =$grand_total+ $total;
echo "<div class='row'>
<div class='col-md-3 col-xs-3'><img src='img/$pro_image' alt='' width='50px'></div>
<div class='col-md-3 col-xs-3'><p>$pro_name</p><a href=''><p><i class='fa fa-trash' aria-hidden='true'></i> Remove</p></a></div>
<div class='col-md-2 col-xs-2'><select class='change_qty' size='1' style='width:50px;'>
<option class='qty' data-pro='$pro_id' value='1' ".$pro_qty==1?'selected':''.">1</option>
<option class='qty' data-pro='$pro_id' value='2' ".$pro_qty==2?'selected':''.">2</option>
<option class='qty' data-pro='$pro_id' value='3' ".$pro_qty==3?'selected':''.">3</option>
<option class='qty' data-pro='$pro_id' value='4' ".$pro_qty==4?'selected':''.">4</option>
<option class='qty' data-pro='$pro_id' value='5' ".$pro_qty==5?'selected':''.">5</option>
<option class='qty' data-pro='$pro_id' value='6' ".$pro_qty==6?'selected':''.">6</option>
<option class='qty' data-pro='$pro_id' value='7' ".$pro_qty==7?'selected':''.">7</option>
<option class='qty' data-pro='$pro_id' value='8' ".$pro_qty==8?'selected':''.">8</option>
<option class='qty' data-pro='$pro_id' value='9' ".$pro_qty==9?'selected':''.">9</option>
</select></div>
<div class='col-md-2 col-xs-2'><input data-pro='$pro_id' id = 'price- $pro_id' type='text' value='$pro_sell_price' disabled class='form-control dis-input price' ></div>
<div class='col-md-2 col-xs-2'><input id = 'total-$pro_id' data-pro='$pro_id' type='text' value='$total' disabled class='form-control dis-input total' ></div>
</div>
<hr>
";
}
}
}
?>
I dont know how to write correct code for this. i want to print "selected" there if my $pro_qty variable == 1. please help
here i have a simple code which is response using ajax . in action page i have select box(for qty)(9 options)(size="1") . my code checks in database product qty so i want to display the qty(from database) "selected" . how can i use ternary operator
Here is my code
if (isset($_POST['getcart'])){
$cart_item_query = "SELECT * FROM cart";
$cart_item_run = mysqli_query($conn,$cart_item_query);
if (mysqli_num_rows($cart_item_run)>0){
$grand_total=0;
while($cart_row=mysqli_fetch_array($cart_item_run)){
$pro_id = $cart_row['product_id'];
$pro_qty = $cart_row['qty'];
$product_query = "SELECT * FROM products WHERE product_id = '$pro_id'";
$product_run = mysqli_query($conn, $product_query);
$product_row = mysqli_fetch_array($product_run);
$pro_name = $product_row['product_name'];
$pro_image = $product_row['product_image'];
$pro_sell_price = $product_row['sell_price'];
$total = $pro_sell_price*$pro_qty;
$grand_total =$grand_total+ $total;
echo "<div class='row'>
<div class='col-md-3 col-xs-3'><img src='img/$pro_image' alt='' width='50px'></div>
<div class='col-md-3 col-xs-3'><p>$pro_name</p><a href=''><p><i class='fa fa-trash' aria-hidden='true'></i> Remove</p></a></div>
<div class='col-md-2 col-xs-2'><select class='change_qty' size='1' style='width:50px;'>
<option class='qty' data-pro='$pro_id' value='1' ".$pro_qty==1?'selected':''.">1</option>
<option class='qty' data-pro='$pro_id' value='2' ".$pro_qty==2?'selected':''.">2</option>
<option class='qty' data-pro='$pro_id' value='3' ".$pro_qty==3?'selected':''.">3</option>
<option class='qty' data-pro='$pro_id' value='4' ".$pro_qty==4?'selected':''.">4</option>
<option class='qty' data-pro='$pro_id' value='5' ".$pro_qty==5?'selected':''.">5</option>
<option class='qty' data-pro='$pro_id' value='6' ".$pro_qty==6?'selected':''.">6</option>
<option class='qty' data-pro='$pro_id' value='7' ".$pro_qty==7?'selected':''.">7</option>
<option class='qty' data-pro='$pro_id' value='8' ".$pro_qty==8?'selected':''.">8</option>
<option class='qty' data-pro='$pro_id' value='9' ".$pro_qty==9?'selected':''.">9</option>
</select></div>
<div class='col-md-2 col-xs-2'><input data-pro='$pro_id' id = 'price- $pro_id' type='text' value='$pro_sell_price' disabled class='form-control dis-input price' ></div>
<div class='col-md-2 col-xs-2'><input id = 'total-$pro_id' data-pro='$pro_id' type='text' value='$total' disabled class='form-control dis-input total' ></div>
</div>
<hr>
";
}
}
}
?>
I dont know how to write correct code for this. i want to print "selected" there if my $pro_qty variable == 1. please help
Share Improve this question edited Aug 23, 2017 at 18:09 Rakesh K asked Aug 23, 2017 at 16:51 Rakesh KRakesh K 1,3301 gold badge18 silver badges44 bronze badges 23- You don't write a ternary directly into the string – GrumpyCrouton Commented Aug 23, 2017 at 16:53
- @GrumpyCrouton Sir,then how can i solve this? – Rakesh K Commented Aug 23, 2017 at 16:54
-
Why did your variable switch from $qty to $pro_qty? What does
$pro_qtyactually equal? Try to echo it before that div – GrumpyCrouton Commented Aug 23, 2017 at 17:53 - no. i am fetching qty from database and saving it in $pro_qty variable – Rakesh K Commented Aug 23, 2017 at 17:57
-
I still need to know what
$pro_qtyequals. – GrumpyCrouton Commented Aug 23, 2017 at 18:03
2 Answers
Reset to default 8You don't write ternaries directly into the string, you need to insert it into the string sort of like a variable, like this:
echo "<option value='1' ".$qty == 1? 'selected' : ''." >1</option> ";
Notice how I broke the string with before the ternary with ", added a period to concatenate the ternary, ending with another period at the end of the ternary, and started the string again with another ".
You can find more detail about this at the PHP manual: String Operations
Alternatives
Seperate ternary from string
I usually use curly braces to concatenate strings into other strings, if your echo statement is surrounded by double quotes (not single quotes), you can use this method
I would have written this with the ternary seperate from the actual string, like this:
$selected = $qty == 1? 'selected' : '';
echo "<option value='1' {$selected}>1</option>";
OR you could drop the curly brackets, but I find this less readable, and harder to tell where variables are. The string also must be wrapped in double quotes.
$selected = $qty == 1? 'selected' : '';
echo "<option value='1' $selected>1</option>";
Using Commas
You can also do string separation by mas:
$selected = $qty == 1? 'selected' : '';
echo "<option value='1'", $selected, ">1</option>";
Alternatively,
echo "<option value='1'", $qty == 1? 'selected' : '', ">1</option>";
if($row['priority'] == '1'){
$selected = 'Selected';
} else {
$selected = '';
}
echo "<td><select id='priority' name='priority'>";
echo "<option value='0'>Low</option>";
echo "<option value='1' ".$selected.">High</option>";
echo "</select></td>";
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