[Solved] Identify the error in this PHP function:function calculate($a = 10, $b) { return $a + $b; } — Ans: Default parameter cannot precede a non-default parameter. | PHP

PHP - Functions

Identify the error in this PHP function:

function calculate($a = 10, $b) {
  return $a + $b;
}

AFunction must return a string, not a number.

BFunction name is invalid.

CParameters must be separated by semicolons.

DDefault parameter cannot precede a non-default parameter.

Step-by-Step Solution

Solution:

Step 1: Check parameter order
Parameter with default ($a=10) comes before non-default ($b), which is invalid in PHP.
Step 2: Confirm PHP syntax rules
All parameters with defaults must be after parameters without defaults.
Final Answer:
Default parameter cannot precede a non-default parameter. -> Option D
Quick Check:
Parameter order rule violation = Error [OK]

Quick Trick: Default parameters must come after required ones [OK]

Common Mistakes:

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