Simple format date parser for PHP (d-m-y or d-m-Y). [ Try out in sandbox: http://sandbox.onlinephpfunctions.com/code/b02657c7bfe827d7e3e20db231e07f3dd41de750 ]

simpleTwoFormatDateParser.php

<?php
    // This snippet does not validate dates. It's a simple parser for multiple CORRECT date formats.
    
    // Some date inputs in different formats. Only accepts d-m-y or d-m-Y formats.
    $dates = 
    array(
        '19-1-1992',
        '2/4/93',
        '14-1-72',
        '12-11-11',
        '25,8,1993',
        '8.8.92',
        '20 4 00',
    );
    
    // Use this variable if wanting to convert different formats to one common format.
    $commonFormat = 'd F Y';
    
    // String replace all separators for the date to hyphens.
    $hyphener = 
    array(
        '/', // Forward slash
        ',', // Comma
        '.', // Dot
        ' ' // Space
    );
    
    for ($i = 0; $i < count($dates); $i++) {
        $date = str_replace($hyphener, '-', $dates[$i]);
   
        // Exploding only to check if year is two digit or four.
        $explodedChecker = explode('-', $date);
        
        // Different parsing for different year digits.
        if (strlen($explodedChecker[2]) > 2) {
            $date = DateTime::createFromFormat('d-m-Y', $date);
        } else {
            $date = DateTime::createFromFormat('d-m-y', $date);
        }
        
        $date = $date->format($commonFormat);
      
        echo "Date ". ($i+1) .": " . $date . "\n";
    }
?>