[Solved] What is wrong with this custom walker class code? class Custom_Walker extends Walker_Nav_Menu { function start_el($output, $item, $depth=0, $args=null, $id=0) { $output .= "" . $item->title . ""; } } | Wordpress

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What is wrong with this custom walker class code?

class Custom_Walker extends Walker_Nav_Menu {
  function start_el($output, $item, $depth=0, $args=null, $id=0) {
    $output .= "" . $item->title . "";
  }
}

AThe class should extend Walker_Page, not Walker_Nav_Menu

BThe method name should be end_el, not start_el

CThe $item parameter is missing

DThe $output parameter should be passed by reference

Step-by-Step Solution

Solution:

Step 1: Check method signature requirements
In Walker_Nav_Menu, start_el must accept &$output by reference to modify it properly.
Step 2: Identify the error in parameter passing
The code uses $output without & reference, so changes won't affect the original output string.
Final Answer:
The $output parameter should be passed by reference -> Option D
Quick Check:
$output must be & passed to modify output [OK]

Quick Trick: Remember $output needs & to update menu HTML [OK]

Common Mistakes:

Forgetting & on $output parameter
Mixing start_el with end_el method
Extending wrong walker class

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What is wrong with this custom walker class code?

Step 1: Check method signature requirements

Step 2: Identify the error in parameter passing

Final Answer:

Quick Check:

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