<?php
$fp = fopen('yourfile.txt', 'r');
$fpr=fopen('result.txt','a');
while (!feof($fp))
{
$mytext = fgets($fp, 9);
echo $mytext."<br />";
$result = substr($mytext,-2,2);
if ($result<=60)
{
$result=$result+2;
$result=substr($mytext,1,5).$result;
echo $result."<br>";
fwrite($fpr, $result);
}
else
{
if ($result==58)
$result="00";
if ($result==59)
$result="01";
if ($result==60)
$result="02";
$result=substr($mytext,1,5).$result;
echo $result."<br>";
fwrite($fpr, $result);
}
}
?>