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How can PHP documentation, such as the manual, be effectively used to troubleshoot coding issues?

Issue: If you are encountering an error in your PHP code and need to troubleshoot it, you can refer to the PHP documentation, such as the manual, to find information on the specific function or feature causing the problem. The manual provides detailed explanations, examples, and user-contributed notes that can help you understand the issue and find a solution. Code snippet:

php 
// Example code using the PHP manual to troubleshoot an issue
// In this case, we are using the array_map function incorrectly

// Incorrect usage of array_map
$array = [1, 2, 3];
$result = array_map('myFunction', $array); // myFunction is not defined

// Correct usage of array_map
function myFunction($value) {
    return $value * 2;
}

$array = [1, 2, 3];
$result = array_map('myFunction', $array);
print_r($result); // Output: Array ( [0] => 2 [1] => 4 [2] => 6 )

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