使用PHP时未加载图像位置

Question

I am trying to show the image location using PHP. The JS code below works for me. When I try to echo the JS code below it stops working. $dbid is the id of the car. I am able to import the car image which corresponds to the id of the car.

1) JS code

var CarImage = document.createElement('img');
CarImage.setAttribute('src', '<?php echo importCarImageLocation($dbid);?>');
document.body.appendChild(CarImage);

Result: The code works and the image is found and loaded.

2) Trying to echo the js code.

echo
"var CarImage = document.createElement('img');
CarImage.setAttribute('src', '<?php echo importCarImageLocation($dbid);?>');
document.body.appendChild(CarImage);";

Result:

Notice: Undefined variable: dbid in C:\xampp\htdocs\testing\test3.php on line 9

3) Using php solution of creating the elements and setting the attributes and echoing the image location

$dom = new DOMDocument('1.0');
$test = $dom->createElement("img");
$testattribute = $dom->createAttribute("src");
$testattribute->value = "<?php echo '/images/cars/1.jpg' ?>" ;
$test->appendChild($testattribute);
$dom->appendChild($test);
echo $dom->saveHTML();

Result: The element and the attributed are created, but the image location is not found. The browser is showing a broken image, which probably indicates that it cannot find the image.

4) Using my function of getting the image location as the source

$dom = new DOMDocument('1.0');
$test = $dom->createElement("img");
$testattribute = $dom->createAttribute("src");
$testattribute->value = "<?php echo importCarImageLocation($dbid);>" ;
$test->appendChild($testattribute);
$dom->appendChild($test);
echo $dom->saveHTML();

Result: Notice: Undefined variable: dbid in C:\xampp\htdocs\basel\testing\test3.php on line 12

5) Not echoing nor using my function of getting the image location

$dom = new DOMDocument('1.0');
$test = $dom->createElement("img");
$testattribute = $dom->createAttribute("src");
$testattribute->value = "images/cars/1.jpg" ;
$test->appendChild($testattribute);
$dom->appendChild($test);
echo $dom->saveHTML();

Result: The image is found and loaded

Can you tell me why number 2, 3 and 4 do not work.

I appreciate your time.

Answer 1

remove PHP tag from these lines from all $testattribute->value = "<?php echo '/images/cars/1.jpg' ?>" ; $testattribute->value = "<?php echo importCarImageLocation($dbid);>" ;