Is it necessary to include an else branch when using mysql_errno() to handle errors in PHP, or can it be omitted?

When using mysql_errno() to handle errors in PHP, it is not necessary to include an else branch to handle the error. The mysql_errno() function returns the error number associated with the most recent MySQL operation, which can be used to determine if an error occurred. You can simply check if the error number is non-zero to handle errors appropriately. 

// Check if an error occurred
if (mysql_errno() != 0) {
    // Handle the error
    $errorNumber = mysql_errno();
    $errorMessage = mysql_error();
    echo "MySQL Error: $errorNumber - $errorMessage";
}

Keywords

mysql_errno error handling PHP else branch omission

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