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Detecting Valid Latitude and Longitude Pairs

  • asifrahman
     + 0 comments

    PHP solution:

    <?php
    $_fp = fopen("php://stdin", "r");
    $input = stream_get_contents($_fp);

    $lines = preg_split('/\R/', $input);
    // Remove first line
    array_shift($lines);

    $pattern = '/^\([\+\-]?(90(?:\.0+)?|[0-8]?\d(?:\.\d+)?),\s?[\+\-]?(180(?:\.0+)?|(?:1?[0-7]\d|0?\d?\d)(?:\.\d+)?)\)$/';
    foreach ($lines as $line) {
        // Check each line
        $result = preg_match($pattern, $line) ? 'Valid' : 'Invalid';
        echo $result . PHP_EOL;
    }
?>