<?php
$str = "racecar";
$pal = "";
for($a=0; $a<strlen($str); $a++)
{
for($z=0; $z<strlen($str); $z++)
$subs = substr($str, $a, $z);
if( $subs == strrev($subs) and strlen($subs) > strlen($pal) ) {
echo $a;
$pal = $subs;
}
}
echo $pal;
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- 6r
preferences:
215.1 ms | 405 KiB | 309 Q