How can storing birthdates as timestamps simplify sorting and querying in PHP?

Storing birthdates as timestamps in PHP simplifies sorting and querying because timestamps are numerical values that can be easily compared and sorted. This allows for efficient querying based on age or birthdate ranges without needing to convert dates to different formats for comparison. 

// Storing birthdates as timestamps
$birthdate1 = strtotime('1990-05-15');
$birthdate2 = strtotime('1985-12-25');

// Sorting birthdates in ascending order
$birthdates = [$birthdate1, $birthdate2];
sort($birthdates);

// Querying based on age range
$minAge = strtotime('-30 years');
$maxAge = strtotime('-20 years');

foreach ($birthdates as $birthdate) {
    if ($birthdate >= $minAge && $birthdate <= $maxAge) {
        echo date('Y-m-d', $birthdate) . " falls within the age range of 20-30 years.\n";
    }
}

Keywords

timestamps birthdates sorting querying PHP

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