What are common issues when sorting dates in SQL queries and how can they be resolved in PHP?

Issue: Common issues when sorting dates in SQL queries include incorrect date formats, timezones not being considered, and null values causing unexpected results. To resolve these issues in PHP, you can use the strtotime function to convert dates into a Unix timestamp before sorting, ensure all dates are in the same timezone, and handle null values appropriately. PHP Code Snippet: 

// Assuming $result is the result set from the SQL query
// Convert dates to Unix timestamp for sorting
usort($result, function($a, $b) {
    return strtotime($a['date']) - strtotime($b['date']);
});

// Ensure all dates are in the same timezone
date_default_timezone_set('UTC');

// Handle null values by assigning a default date
foreach ($result as $row) {
    if ($row['date'] == null) {
        $row['date'] = '1970-01-01'; // or any other default date
    }
}

// Now $result is sorted by date and all dates are in the same timezone

Keywords

SQL queries date sorting PHP datetime functions sorting errors

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