PHP Calculate Age

PHP calculate age

This works fine.

<?php
  //date in mm/dd/yyyy format; or it can be in other formats as well
  $birthDate = "12/17/1983";
  //explode the date to get month, day and year
  $birthDate = explode("/", $birthDate);
  //get age from date or birthdate
  $age = (date("md", date("U", mktime(0, 0, 0, $birthDate[0], $birthDate[1], $birthDate[2]))) > date("md")
    ? ((date("Y") - $birthDate[2]) - 1)
    : (date("Y") - $birthDate[2]));
  echo "Age is:" . $age;
?>

Calculate age based on date of birth

PHP ^{>= 5.3.0}

# object oriented
$from = new DateTime('1970-02-01');
$to   = new DateTime('today');
echo $from->diff($to)->y;

# procedural
echo date_diff(date_create('1970-02-01'), date_create('today'))->y;

demo

^{functions: date_create(), date_diff()}

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MySQL ^{>= 5.0.0}

SELECT TIMESTAMPDIFF(YEAR, '1970-02-01', CURDATE()) AS age

demo

^{functions: TIMESTAMPDIFF(), CURDATE()}

PHP: How to calculate person age in months

Using PHP's DateInterval (available from 5.3.0), that's pretty easy:

$birthday = new DateTime('1990-10-13');
$diff = $birthday->diff(new DateTime());
$months = $diff->format('%m') + 12 * $diff->format('%y');

Now $months will contain the number of months I've lived.

Calculate age with PHP in YYYY MM DD format

Always be careful with date notation (ie. order of years, months and days).

This is working (original code adapted):

<?php
$birthDate = "1984-05-21";

$birthDate = explode("-", $birthDate);

$age = (date("md", date("U", mktime(0, 0, 0, $birthDate[2], $birthDate[1], $birthDate[0]))) > date("md") ? ((date("Y")-$birthDate[0])-1):(date("Y")-$birthDate[0]));
echo "Age is: ".$age;
?>

Calculate age in a list with Laravel

age calculation by using Laravel carbon.

use Carbon\Carbon;

$dateOfBirth = '1994-07-02';
$years = Carbon::parse($dateOfBirth)->age;

As per your code.

@if(!empty($pets))
    @foreach($pets as $pet)
        {{ Carbon::parse($pet->date_birth)->age ?? 0 }} years
    @endforeach
@endif

PHP calculate age with DateTime::diff

than, use ajax instead.... this is really some quick and dirty solution...so you should adapt and improve this..

//getBirtday.php
<?php

$age = "";
$data = $_POST['birthday'];
if(!empty($data)){
    $birthday = $data['year'].'-'.$data['month'].'-'.$data['date'];
    $biday = new DateTime($birthday);
    $today = new DateTime();
    $diff = $today->diff($biday);
    $age = $diff->y;
}
echo $age;
?>


//test.php (get sure your jquery is loaded....)

<script>
$(document).ready(function(){

    $('#year').on("change", function(){

        birthday["date"] = $("#day").val();
        birthday["month"] = $("#month").val();
        birthday["year"] = $("#year").val();

        $.ajax({               
               url: 'getBirthday.php',
               method: "POST",
               data: {birthday:birthday},
               error: function(error) {
                    alert("ERROR"+error);
               },              
               success: function(data) {
                   $("#age").val(data);
               }
        });     
    });     
});

</script>


</p> <p>AGE :</label> <input type="text" name="age" id="age" value="<?=$age?>" readonly></p>

<form name="form1" method="post" action="#">    
    BDAY:<?php
    echo "<select name='date' id='day'>";
    echo "<option selected='selected'>date</option>";
    for($a=1; $a<=31; $a+=1)
    {
        echo"<option value=$a> $a </option>";
    }
    echo "</select>";

    echo "<select name='month' id='month'>";
    echo "<option selected='selected'>month</option>";
    $month=array(1=> "Januari",2 => "Februari", 3=> "Maret", 4=> "April", 5=> "Mei", 6=> "Juni", 7=>"Juli", 8=> "Agustus", 9=> "September", 10=>"Oktober",11=>"November",12=>"Desember");
    for($c=0; $c<count($month); $c++)
    {
        echo "<option value=$c> $month[$c] </option>";
    }
    echo "</select>";

    $now=date('Y');
    echo "<select name='year' id='year'>";
    echo "<option selected='selected'>year</option>";
    for ($a=1990;$a<=$now;$a++)
    {
        echo "<option value='$a'>$a</option>";
    }
    echo "</select>";
    ?>

</form>

How to calculate the age of a person using variables like: year, month, day in PHP

You can use this for age calculation:

$today = new DateTime("now");
$birthdate = new DateTime("$year-$month-$day");
$age = $today->diff($birthdate)->y;

Update:

So the whole code with some cleanup will be like:

<?php
    $name = $_POST['name'];
    $month = $_POST['month'];
    $day = $_POST['day'];
    $year = $_POST['year'];
    $today = new DateTime("now");
    $birthdate = new DateTime("$year-$month-$day");
    $age = $today->diff($birthdate)->y;
    $nos = $_POST['nos'];
    $gender = $_POST['gender'];
    $loa = $_POST['loa'];
?>
<div style ='font:21px Arial,tahoma,sans-serif;color:#7a1ac4'>
    <b>`Name:`</b>
    <?php echo $name; ?>
</div>;
<div style ='font:21px Arial,tahoma,sans-serif;color:#7a1ac4'>
    <b>`Birth Date:`</b>
    <?php echo $birthdate->format('Y-m-d'); ?>
</div>;
<div style ='font:21px Arial,tahoma,sans-serif;color:#7a1ac4'>
    <b>`Age:`</b> aprox.
    <?php echo $age; ?>
</div>;
<div style ='font:21px Arial,tahoma,sans-serif;color:#7a1ac4'>
    <b>`Name of School:`</b>
    <?php echo $nos; ?>
</div>;
<div style ='font:21px Arial,tahoma,sans-serif;color:#7a1ac4'>
    <b>`Gender:`</b>
    <?php echo $gender; ?>
</div>;
<div style ='font:21px Arial,tahoma,sans-serif;color:#7a1ac4'>
    <b>`Level of Academics:`</b>
    <?php echo $loa; ?>
</div>;

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