从字符串中创建日期

I have some string like this.

$str = '14032017';

I want convert it to date format and show the result as 14-03-2017

I already try this but still didn't work :

<?php

$str = '14032017';
$strdate = strtotime($str);
$date = date('d-m-Y',$strdate);

echo $date;

?>

How could I to do that ?

Try this

$str = '14032017';
$date = DateTime::createFromFormat('dmY', $str);
if($date === false){
   echo 'Invalid Date';
}else{
   echo $date->format('d-m-Y');
}

You can use the DateTime Class for this. ( i assume that your str is in dmY format )

    $str = '14032017';
    $date = DateTime::createFromFormat('dmY', $str);
    echo $date->format('d/m/Y'); // Will print 14/03/2017

    $str = '14032017';

    $strdate = DateTime::createFromFormat('dmY',$str)->format('Y-m-d H:i:s');

Use the correct format in your string. for 14032017 = dmY for 14-03-2017 = d-m-Y etc ...