What is the output of this PHP code?

medium📝 Predict Output Q4 of 15

PHP - Functions

function add($x, $y = 5) {
  return $x + $y;
}
echo add(10);

A15

B10

DError: Missing argument

Step-by-Step Solution

Solution:

Step 1: Identify default parameter usage
Function add has $y defaulting to 5 if not provided.
Step 2: Call add with one argument
Calling add(10) means $x=10, $y uses default 5, so sum is 15.
Final Answer:
15 -> Option A
Quick Check:
Default parameter used = 15 output [OK]

Quick Trick: Missing argument uses default value in calculation [OK]

Common Mistakes:

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