PHP Echo Line Breaks

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Use the PHP_EOL constant, which is automatically set to the correct line break for the operating system that the PHP script is running on.

Note that this constant is declared since PHP 5.0.2.

<?php
    echo "Line 1" . PHP_EOL . "Line 2";
?>

For backwards compatibility:

if (!defined('PHP_EOL')) {
    switch (strtoupper(substr(PHP_OS, 0, 3))) {
        // Windows
        case 'WIN':
            define('PHP_EOL', "\r\n");
            break;

        // Mac
        case 'DAR':
            define('PHP_EOL', "\r");
            break;

        // Unix
        default:
            define('PHP_EOL', "\n");
    }
}

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