strtotime,Floor, Abs, Ceil Functions In PHP
strtotime():- This function converts and English text DateTime into a unique timestamp but we have to wrap the result using this date format date(‘Y-m-d’) to avoid the errors. For example
<?php
$date = '1 January 2020';
echo date('Y-m-d',strtotime($date));
?>
The output is 2020-01-01
floor():- This function returns a number down to its nearest integer. For example
<?php
echo floor(0.30).'<br>';
echo floor(3).'<br>';
echo floor(3.3).'<br>';
echo floor(-3.3).'<br>';
?>
The output will be like this----
0
3
3
-4
Ceil():- This function returns a number up to its nearest integer. For example:-
<?php
echo ceil(0.30).'<br>';
echo ceil(3).'<br>';
echo ceil(3.3).'<br>';
echo ceil(-3.3).'<br>';
?>
The output will be like this----
1
3
4
-3