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<?php /** * Find substring starting in string, starting from some symbol(s) * @param string $haystack * @param string $needle * @return string */ function my_strstr(string $haystack, string $needle): string { for($i = 0; $i < strlen($haystack); $i++) { if($haystack[$i] == $needle[0]) { $eq = true; for($j = 0; $j < strlen($needle); $j++) { if($haystack[$i + $j] !== $needle[$j]) { $eq = false; break; } } if($eq) { return substr($haystack, $i); } } } } var_dump(my_strstr('asdfghend', 'fg')); // 'fghend';

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