[Solved] What is wrong with this error handler function?function handler($errno, $errstr) { echo "Error: $errstr"; return 1; } set_error_handler('handler'); | PHP

PHP - Error and Exception Handling

What is wrong with this error handler function?

function handler($errno, $errstr) {
  echo "Error: $errstr";
  return 1;
}
set_error_handler('handler');

Aset_error_handler requires a closure, not a named function.

BReturn value should be boolean, not integer.

CEchoing error message is not allowed in handler.

DFunction must accept four parameters.

Step-by-Step Solution

Solution:

Step 1: Check the return type expected from error handlers
Custom error handlers should return true or false (boolean), not integers.
Step 2: Validate other options
Accepting two parameters is allowed, echoing is allowed, and named functions are valid.
Final Answer:
Return value should be boolean, not integer. -> Option B
Quick Check:
Return boolean from error handler [OK]

Quick Trick: Return true or false from error handler, not numbers [OK]

Common Mistakes:

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