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<?php function longest_palendrome($string) { $current = $longest = ''; foreach (str_split(strrev($string)) as $char) { if (strstr($current . $char, $string)) { $current .= $char; } elseif (!empty($current) && strlen($current) > strlen($longest)) { $longest = $current; } } return $longest; } echo longest_palendrome("i ama racecar");
Output for 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, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 4.4.5 - 4.4.9
<br /> <b>Fatal error</b>: Call to undefined function: str_split() in <b>/in/67AOW</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
<br /> <b>Fatal error</b>: Call to undefined function: str_split() in <b>/in/67AOW</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1
<br /> <b>Fatal error</b>: Call to undefined function: str_split() in <b>/in/67AOW</b> on line <b>5</b><br />
preferences:
223.75 ms | 401 KiB | 361 Q