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<?php function longest_palendrome($string) { $words = explode(' ', $string); $longest = ''; foreach ($words as $word) { $letters = $reversed = str_split($word); array_reverse($reversed); if ($letters === implode('', $reversed) && strlen($word) > strlen($longest)) { $longest = $word; } } return $word; } 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
racecar
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: str_split() in /in/tNZGU on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: str_split() in /in/tNZGU on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: str_split() in /in/tNZGU on line 7
preferences:
228.27 ms | 401 KiB | 312 Q