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Asked: 2026-06-12T08:37:35+00:00

I am having trouble with the strtotime() in my code to separate date. When

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I am having trouble with the strtotime() in my code to separate date. When i use “/” the format becomes mm-dd-yyyy and when i use”-” the format becomes dd-mm-yyyy. I am trying to use both “/” and “-” when the user inputs the date
I have used preg_macth to validate weather the user has given – or /
A big thanks to the guy who can help me with this.
My code is given below

<?php
$date1=$_GET["q1"];
$date2= $_GET["q2"];
// To check date format for From date   
function checkDateFormat1($date1)
{
//match the format of the date
    if( (preg_match(" /^(\d{1,2})\-(\d{1,2})\-(\d{4})$/", $date1,$parts)) || (preg_match(" /^(\d{1,2})\/(\d{1,2})\/(\d{4})$/", $date1,$parts)) )
{
    //check weather the date is valid of not
    //if(checkdate($parts[2],$parts[3],$parts[1]))
    if(checkdate($parts[2],$parts[1],$parts[3]))
    return true;
    else
    return false;
}
else
return false;
}

 // To check the format for To date         
 function checkDateFormat2($date2)
{

if((preg_match(" /^(\d{1,2})\-(\d{1,2})\-(\d{4})$/", $date2,$parts))||(preg_match(" /^(\d{1,2})\/(\d{1,2})\/(\d{4})$/", $date2,$parts)))
{
    //check weather the date is valid of not
    //if(checkdate($parts[2],$parts[3],$parts[1]))
    if(checkdate($parts[2],$parts[1],$parts[3]))
    return true;
    else
    return false;
}
else
return false;
 }                      

if ((checkDateFormat2($date2) && checkDateFormat1($date1))==1)
{
if ($date1==$date2)
{
    $days="1";
    echo $days;
    exit;
}
else
{   
    $difference =(strtotime($date2) - strtotime($date1));
    //calculate the number of days
    $days = round(((($difference/60)/60)/24), 0);
}
 }
 else
 {
     echo "Invalid Date Format"."<br>";
echo "Please make sure that your for date format is MM-DD-YYYY";

exit;
        }

  if ($days<0)
 {
echo "From date cannot be greater than to date";

}   
else
{
$days++;
echo $days;


}   
 ?>
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1 Answer

  1. Editorial Team

    It is working exactly like strToTime() is supposed to work. From the php manual:

    Note:

    Dates in the m/d/y or d-m-y formats are disambiguated by looking at the separator between the various components: if the separator is a slash (/), then the American m/d/y is assumed; whereas if the separator is a dash (-) or a dot (.), then the European d-m-y format is assumed.

    To avoid potential ambiguity, it’s best to use ISO 8601 (YYYY-MM-DD) dates or DateTime::createFromFormat() when possible.

    http://php.net/manual/en/function.strtotime.php

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