What will be the output of this PHP code?

medium📝 Predict Output Q4 of 15

PHP - Functions

$a = 10;
function test() {
  global $a;
  $a = 20;
}
test();
echo $a;

A10

BError

C20

DNothing

Step-by-Step Solution

Solution:

Step 1: Analyze global keyword effect
Inside test(), global $a; links to the global variable $a.
Step 2: Variable modification
Assigning $a = 20; changes the global $a value to 20.
Final Answer:
20 -> Option C
Quick Check:
global modifies global variable = 20 [OK]

Quick Trick: global lets function change global variable value [OK]

Common Mistakes:

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